1. | The carbon percentage in diesel oil is nearly |
A. | 52% |
B. | 66% |
C. | 100% |
D. | 86% |
E. | 74% |
Answer» D. 86% |
2. | Which of the following power plant can be easily started from cold conditions? |
A. | Nuclear power plant |
B. | Thermal power plant |
C. | Diesel engine power plant |
D. | Any of the above |
E. | None of the above |
Answer» C. Diesel engine power plant |
3. | 100 MW Dhurva reactor is basically a |
A. | research reactor |
B. | power generation unit |
C. | recycling unit |
D. | None of the above |
E. | None of the above |
Answer» A. research reactor |
4. | Which of the following plant is suitable for peak load? |
A. | Diesel engine plant |
B. | Steam power plant |
C. | Nuclear power plant |
D. | Hydro-electric power plant |
E. | All of the above |
Answer» A. Diesel engine plant |
5. | Gas turbines are widely used in |
A. | Power generation |
B. | Aircraft |
C. | Pumping stations |
D. | Ship |
E. | Locomotive |
Answer» B. Aircraft |
6. | The alternators for a steam power plant usually run at |
A. | 3000 rpm |
B. | 1500 rpm |
C. | 1200 rpm |
D. | 30,000 rpm |
E. | 750 rpm |
Answer» A. 3000 rpm |
7. | Producer gas mainly contains |
A. | carbon dioxide and steam |
B. | carbon monoxide and nitrogen |
C. | methane, ethane and butane |
D. | hydrocarbons |
E. | None of the above |
Answer» B. carbon monoxide and nitrogen |
8. | Which of the following equipment is installed in power plants to reduce air pollution due to smoke? |
A. | Desuperheaters |
B. | Electrostaric precipitators |
C. | Reheaters |
D. | Air filters |
E. | None of the above |
Answer» B. Electrostaric precipitators |
9. | The flicker effect of fluorescent lamps is more pronounced at |
A. | Lower frequencies |
B. | Higher frequencies |
C. | Lower voltage |
D. | Higher voltages |
E. | None of the above |
Answer» E. None of the above |
10. | Geologists believe that below the earth’s crust, the molten mass exists in the form of |
A. | magma |
B. | vent |
C. | hot cell |
D. | liquation |
E. | None of the above |
Answer» A. magma |
11. | Return to earth of the oxides of sulphur and nitrogen occurs in the form of |
A. | acid rain |
B. | acid show |
C. | acid fog |
D. | any of the above |
E. | None of the above |
Answer» D. any of the above |
12. | ASTM coal classification is based on |
A. | proximate analysis |
B. | ultimate analysis |
C. | orsat analysis |
D. | None of the above |
E. | None of the above |
Answer» A. proximate analysis |
13. | The phenomenon of physical adhesion of molecules to the surfaces of solids without chemical reaction is known as |
A. | dredging |
B. | coking |
C. | adsorption |
D. | liquation |
E. | None of the above |
Answer» C. adsorption |
14. | When a conductor is suspended between two supports at the same level it taken the shape of |
A. | Parabola |
B. | Semi-circle |
C. | Cycloid |
D. | Epicycloid |
E. | Catenary |
Answer» E. Catenary |
15. | Which of the following plant can be conveniently located close to be load centre? |
A. | Nuclear power plant |
B. | Hydro-electric power plant |
C. | Diesel engine power plant |
D. | Steam power plant |
E. | All of the above |
Answer» C. Diesel engine power plant |
16. | Fluidized bed combustion helps to reduce |
A. | boiler size |
B. | pollution |
C. | both (A) and (B) above |
E. | None of the above |
Answer» C. both (A) and (B) above |
17. | Electrostatic precipitators are most effective on |
A. | carbon dioxide |
B. | nitrogen |
C. | coarse dust |
D. | fine dust |
E. | None of the above |
Answer» D. fine dust |
18. | A 660 V cable is known as |
A. | Extra high tension cable |
B. | High tension cable |
C. | Super tension cable |
D. | Low tension cable |
E. | Extra super voltage cable |
Answer» D. Low tension cable |
19. | Which of the following public sector unit is engaged in the manufacture of thermal power plants? |
A. | Department of science and technology |
B. | National Thermal Power Corporation Ltd |
C. | Heavy Engineering Corporation Ltd |
D. | Bharat Heavy Electricals Ltd |
E. | Coal India Ltd |
Answer» D. Bharat Heavy Electricals Ltd |
20. | A layer of fibrous material like jute or hessian type provided over metallic sheath on a cable is known as |
A. | Armouring |
B. | Bedding |
C. | Laying |
D. | Cover |
E. | None of the above |
Answer» B. Bedding |
21. | In a long transmission line, the effect of |
A. | resistance and capacitance is taken into account but effect of inductance is neglected |
B. | resistance, capacitance and inductance is taken into account |
C. | capacitance and inductance is taken into account but effect of resistance is neglected |
D. | resistance, capacitance and inductance is neglected |
E. | resistance and inductance is taken into account but effect of capacitance is neglected |
Answer» B. resistance, capacitance and inductance is taken into account |
22. | Which of the following short-circuit is the most dangerous? |
A. | Line to line short circuit |
B. | Dead short circuit |
C. | Line to ground short circuit |
D. | Line to line and ground short circuit |
E. | None of the above |
Answer» B. Dead short circuit |
23. | Transient disturbances are due to |
A. | switching operations |
B. | load variations |
C. | faults |
D. | Any of the above |
E. | None of the above |
Answer» D. Any of the above |
24. | Which of the following power plant will give least running cost of the production of electrical power? |
A. | Nuclear power plant |
B. | Gas turbine power plant |
C. | Diesel engine power plant |
D. | Steam power plant |
E. | All will have nearly same running cost |
Answer» A. Nuclear power plant |
26. | In a steam turbine cycle the lowest pressure occurs in | |||
A. | Turbine inlet | |||
B. | Super-heater | |||
C. | Super-heater exit | |||
D. | Boiler | |||
E. | Condenser | |||
Answer» E. Condenser | ||||
27. | Which of the following is not a high pressure boiler? |
A. | Loeffler |
B. | Lancashire coiler |
C. | Velox boiler |
D. | La Mont boiler |
E. | None of the above |
Answer» B. Lancashire coiler |
28. | TNT |
A. | thermonuclear thorium |
B. | total neutron transition |
C. | thermal neutron treatment |
D. | trinitrotoluene |
E. | None of the above |
Answer» D. trinitrotoluene |
29. | All of the following are heavy metals EXCEPT |
A. | Mercury |
B. | Sodium |
C. | Chromium |
D. | Cadmium |
E. | None of the above |
Answer» B. Sodium |
30. | The characteristic impedance of transmission line depends upon |
A. | shape of the conductor |
B. | surface treatment of the conductor |
C. | geometrical configuration of the conductor |
D. | conductivity of the material |
E. | None of the above |
Answer» C. geometrical configuration of the conductor |
31. | A relay for protective system should have |
A. | High speed operation |
B. | High sensitivity |
C. | Selectivity |
D. | Reliability |
E. | All of the above |
Answer» E. All of the above |
32. | Beaufort scale is used to measure |
A. | beta and gamma radiations |
B. | wind speed |
C. | insulation |
D. | depth of sea |
E. | None of the above |
Answer» B. wind speed |
33. | If K be the volume of conductor for two wire dc system, then for the same voltage the volume of conductor for 3 wire dc system for supplying the same load will be |
A. | 0.25 K |
B. | 2 K |
C. | 1.25 K |
D. | 0.3125 K |
E. | 5 K |
Answer» D. 0.3125 K |
34. | The problem of ash handling does not exist in case of —— fired boilers. |
A. | Lignite |
B. | Pulverised fuel |
C. | Peat |
D. | Gas |
E. | None of the above |
Answer» D. Gas |
35. | One BTU is the amount of energy required to raise the temperature of |
A. | One gram of water through 1?F |
B. | One pound of water through 1?F |
C. | One kilogram of water through ?F |
D. | One pound of water through 1?C |
E. | One gram of water through 1?C |
Answer» B. One pound of water through 1?F |
36. | Which of the following material has the best conductivity? |
A. | Cadmium copper |
B. | Aluminium |
C. | Copper |
D. | 5.71 |
E. | ACSR |
Answer» C. Copper |
37. | The voltage of a 2 wire de system is raised from 200 V to 400 V. For the same power transmitted over the same distance and for the same power loss, the saving in conductor copper will be |
A. | 75% |
B. | 60% |
C. | 25% |
D. | 40% |
E. | 50% |
Answer» A. 75% |
38. | Coal rank classifies coal according to its |
A. | carbon percentage |
B. | ash content |
C. | degree of metamorphism |
D. | density |
E. | None of the above |
Answer» C. degree of metamorphism |
39. | The capacity of generators being installed in super-thermal power plant is |
A. | 220 MW |
B. | 400 MW |
C. | 100 MW |
D. | 200 MW |
E. | 500 MW |
Answer» E. 500 MW |
40. | The disadvantage of renewable sources of energy is |
A. | lack of dependability |
B. | availability in low energy densities |
C. | intermittency |
D. | All of the above |
E. | None of the above |
Answer» D. All of the above |
41. | Local winds are caused by |
A. | differential heating of land and water |
B. | differential heating of plains and mountains |
C. | any of the above |
E. | None of the above |
Answer» C. any of the above |
42. | Corona usually occurs when the electrostatic stress in the air around the conductor exceeds |
A. | 32 kV (maximum values)/cm |
B. | 22 kV (maximum value)/cm |
C. | 11 kV (rms value)/cm |
D. | 6.6 kV (rms value)/cm |
E. | None of the above |
Answer» A. 32 kV (maximum values)/cm |
43. | Exosphere is the space beyond the earth’s atmosphere. It begins at a height of about |
A. | 100 km |
B. | 220 km |
C. | 400 km |
D. | 1000 km |
E. | None of the above |
Answer» D. 1000 km |
44. | Which of the following power plant can be installed within the shortest possible time? |
A. | Gas turbine power plant |
B. | Hydro-electric power plant |
C. | Steam power plant |
D. | Nuclear power plant |
E. | Diesel engine power plant |
Answer» E. Diesel engine power plant |
45. | Hopkinson demand rate curve is a |
A. | one part tariff |
B. | two part tariff |
C. | three part tariff |
D. | four part tariff |
E. | None of the above |
Answer» B. two part tariff |
46. | API gravity is expressed in terms of |
A. | gm/cc |
B. | dimensionless numbers |
C. | degrees |
D. | None of the above |
E. | None of the above |
Answer» C. degrees |
47. | Which of the following is not the standard rating of GLS lamps in India? |
A. | 100 W |
B. | 50 W |
C. | 25 W |
D. | 60 W |
E. | 40 W |
Answer» B. 50 W |
48. | Thermal neutrons are |
A. | exceptionally fast neutrons |
B. | fast neutrons |
C. | moderately fast neutrons |
D. | slow neutrons |
E. | None of the above |
Answer» D. slow neutrons |
49. | Which of the following place is associated with thermal power plants? |
A. | Obra |
B. | Tarapur |
C. | Agra |
D. | DVC |
E. | Bhakra |
Answer» A. Obra |
51. | Illuminating gas is | |||
A. | blast furnace gas | |||
B. | coal and carburretted water gas | |||
C. | methane gas | |||
D. | light petroleum gas | |||
E. | None of the above | |||
Answer» B. coal and carburretted water gas | ||||
52. | Deuterium oxide is used in nuclear reactors as |
A. | fuel |
B. | moderator |
C. | shield |
D. | regulator |
E. | None of the above |
Answer» B. moderator |
53. | The advantage of dc transmission system over ac transmission system is |
A. | dc system it economical |
B. | there is no skin effect in dc system |
C. | corona limits are highest for dc circuits as compared to ac circuits |
D. | All of the above |
E. | None of the above |
Answer» D. All of the above |
54. | In a medium transmission line the effect of |
A. | resistance and inductance is negligible but effect of capacitance is taken into account |
B. | resistance is negligible |
C. | capacitance is negligible |
D. | inductance is negligible |
E. | resistance, capacitance and inductance is taken into account |
Answer» E. resistance, capacitance and inductance is taken into account |
55. | The presence of CO2 and H2O in the atmosphere results in absorption of |
A. | short wave ultraviolet radiations |
B. | visible wavelengths of spectrum |
C. | long wave infrared radiations |
D. | all of the above |
E. | None of the above |
Answer» C. long wave infrared radiations |
56. | The calorific value of natural gas is expected to be around |
A. | 2000 kcal/m3 |
B. | 500 kcal/m3 |
C. | 1500 kcal/m3 |
D. | 2500 kcal/m3 |
E. | 25000 kcal/m3 |
Answer» B. 500 kcal/m3 |
57. | The name DVC is associated with which type of power generation? |
A. | Gas turbine |
B. | Hydro-electric |
C. | Thermal |
D. | Diesel engine |
E. | Nuclear |
Answer» B. Hydro-electric |
58. | Which of the following gas is sometimes filled in filament lamps? |
A. | Hydrogen |
B. | Helium |
C. | Argon |
D. | Ozone |
E. | Oxygen |
Answer» C. Argon |
59. | The heating value of coal largely depends on |
A. | Sulphur content |
B. | Volatile matter |
C. | Moisture content |
D. | Size of coal particles |
E. | Carbon content |
Answer» E. Carbon content |
60. | Pulverised coal is |
A. | Non-smoking coal |
B. | Coal free from as content |
C. | Coal which burns for long time |
D. | Coal free from sulphur |
E. | Coal broken into fine pieces |
Answer» E. Coal broken into fine pieces |
61. | The skin effect of a conductor will reduce as |
A. | the diameter increases |
B. | the frequency increases |
C. | the permeability of conductor material increases |
D. | the resistivity of conductor material increases |
E. | None of the above |
Answer» D. the resistivity of conductor material increases |
62. | The calorific value of diesel oil is expected to be around |
A. | 21000 kcal/kg |
B. | 5000 kcal/kg |
C. | 16000 kcal/kg |
D. | 1000 kcal/kg |
E. | 11000 kcal/kg |
Answer» E. 11000 kcal/kg |
63. | The expected life of wooden poles is |
A. | 1 year |
B. | 5 years |
C. | 15 years |
D. | 50 years |
E. | None of the above |
Answer» C. 15 years |
64. | The average cost of power per kWh for domestic consumers in India is |
A. | 10 to 15 paise |
B. | 20 to 30 paise |
C. | 30 to 45 paise |
D. | 50 to 65 paise |
E. | None of the above |
Answer» D. 50 to 65 paise |
65. | Betz law finds application in |
A. | MHD systems |
B. | Solar cells |
C. | Geothermal power plants |
D. | Wind mills |
E. | None of the above |
Answer» D. Wind mills |
66. | When a 66 kV transmission line passes over a residential building, the minimum vertical clearance from the roof of the building must be |
A. | 4 metres |
B. | 7.5 metres |
C. | 10 metres |
D. | 15 metres |
E. | None of the above |
Answer» A. 4 metres |
67. | The highest voltage at which the power is transmitted in India is |
A. | 33 kV |
B. | 66 kV |
C. | 132 kV |
D. | 400 kV |
E. | 220 kV |
Answer» D. 400 kV |
68. | Activated carbon is used for |
A. | absorption of gases |
B. | paints and varnishes as colouring agent |
C. | purification of water |
D. | production of carbon steels |
E. | None of the above |
Answer» A. absorption of gases |
69. | In any transmission line, which two generalised constants are equal? |
A. | A and B |
B. | A and C |
C. | A and D |
D. | B and C |
E. | C and D |
Answer» C. A and D |
70. | In case of oil fired boiler, the excess air is usually |
A. | 1 to 2 percent |
B. | 5 to 12 percent |
C. | 20 to 25 percent |
D. | 75 to 125 percent |
E. | None of the above |
Answer» B. 5 to 12 percent |
71. | Watt second is the unit of |
A. | Force |
B. | Momentum |
C. | Power |
D. | Energy |
E. | None of the above |
Answer» D. Energy |
72. | A metallic sheath is provided on cable |
A. | to protect against moisture, gases and other damaging liquids |
B. | to protect from mechanical damage due to rubbing |
C. | to protect against sparking |
D. | to avoid damage to the cable during laying |
E. | All of the above |
Answer» A. to protect against moisture, gases and other damaging liquids |
73. | The efficiency of a thermal power plant improves with |
A. | Larger quantity of water used |
B. | Lower load on the plant |
C. | Increased quantity of coal burnt |
D. | Use of high pressure steam |
E. | All of the above |
Answer» D. Use of high pressure steam |
74. | Which of the following is the advantage of de transmission? |
A. | Absence of line inductance and capacitance problems |
B. | No skin effects |
C. | For the same working voltage the potential stress on the insulation is less |
D. | No stability problems |
E. | All of the above |
Answer» E. All of the above |
76. | Which of the following is a natural solid fuel? | |||
A. | Pulverised coal | |||
B. | Wood charcoal | |||
C. | Bituminous coal | |||
D. | Coking coal | |||
E. | None of the above | |||
Answer» C. Bituminous coal | ||||
77. | The power factor of a 3 phase induction motor near full load is expected to be around |
A. | 0.5 leading |
B. | 0.5 lagging |
C. | 0.1 lagging |
D. | 0.8 lagging |
E. | 0.8 leading |
Answer» D. 0.8 lagging |
78. | When geothermal energy is available in the form of saline water, power is developed using |
A. | flashed – steam system |
B. | binary – cycle system |
C. | total flow system |
D. | any of the above |
E. | None of the above |
Answer» D. any of the above |
79. | If an engine has spark plugs, it can be safely concluded that it is |
A. | a two stroke engine |
B. | a air cooled engine |
C. | not a diesel engine |
D. | a four stroke engine |
E. | a water cooled engine |
Answer» C. not a diesel engine |
80. | No moving parts are required in |
A. | MHD generator |
B. | Tidal power plant |
C. | Thermionic conversion |
D. | OTEC power plant |
E. | None of the above |
Answer» C. Thermionic conversion |
81. | The work of installation and commissioning of power plants in India is generally undertaken by |
A. | NHPC Ltd |
B. | Steel Authority of India |
C. | NTPC Ltd. |
D. | Coal Authority of India |
E. | HAL |
Answer» C. NTPC Ltd. |
82. | When the reactive component is small |
A. | the phase angle will be small and p.f. will be leading |
B. | the phase angle will be large and p.f. will be high |
C. | the phase angle will be small and p.f. will be unity |
D. | the phase angle will be small and p.f. will be high |
E. | the phase angle will be large and p.f. will be low |
Answer» D. the phase angle will be small and p.f. will be high |
83. | Which of the following colour has wavelength between green and red colour? |
A. | Yellow |
B. | Blue |
C. | Violet |
D. | All of the above |
E. | None of the above |
Answer» A. Yellow |
84. | Which of the following statement is correct? |
A. | Wind pressure reduces corona effects |
B. | Ice on conductors improves power factor |
C. | Wind pressure is taken to act in a direction at right angles to that for ice |
D. | Wind pressure and ice on conductors together improve regulation of power transmitted |
E. | None of the above |
Answer» C. Wind pressure is taken to act in a direction at right angles to that for ice |
85. | An Orsat apparatus gives |
A. | volumetric analysis |
B. | gravimetric analysis |
C. | approximate analysis |
D. | only presence of constituents |
E. | None of the above |
Answer» A. volumetric analysis |
86. | The specific gravity of copper is |
A. | 8.9 |
B. | 16.9 |
C. | 13.9 |
D. | 2.9 |
E. | 5.9 |
Answer» E. 5.9 |
87. | Conductors for high voltage transmission lines are suspended from towers |
A. | to reduce clearance from ground |
B. | to increase clearance from ground |
C. | to reduce wind and snow loads |
D. | to take care of extension in length during summer |
E. | None of the above |
Answer» D. to take care of extension in length during summer |
88. | Economiser in a steam power plant is used |
A. | To preheat air |
B. | To preheat feed water |
C. | To superheat steam |
D. | None of the above |
E. | None of the above |
Answer» B. To preheat feed water |
89. | A pin type insulator is generally used upto |
A. | 66 kV |
B. | 132 kV |
C. | 33 kV |
D. | 1.1 kV |
E. | 11 kV |
Answer» C. 33 kV |
90. | Naphtha is a volatile colourless product obtained from |
A. | methyl alcohol |
B. | vinyl acetate |
C. | sugar cane |
D. | petroleum |
E. | None of the above |
Answer» D. petroleum |
91. | A 66 kV transmission line carrying power to a distance of 120 kilometre will be termed as |
A. | Short transmission line |
B. | Very short transmission line |
C. | Long transmission line |
D. | Medium transmission line |
E. | Tiny transmission line |
Answer» D. Medium transmission line |
92. | Solar cells are made of |
A. | silicon |
B. | germanium |
C. | silver |
D. | aluminium |
E. | None of the above |
Answer» A. silicon |
93. | In case the supply frequency is reduced from 50 Hz to 1 Hz which method of heating will be least affected? |
A. | Resistance heating |
B. | Dielectric heating |
C. | Induction heating |
D. | All of the above |
E. | None of the above |
Answer» A. Resistance heating |
94. | Bottoming cycle in case of combined cycle power geneation is normally |
A. | Gas turbine cycle |
B. | Steam cycle |
C. | any of the above |
D. | None of the above |
E. | None of the above |
Answer» B. Steam cycle |
95. | The major disadvantage with solar cells for power generation is |
A. | lack of availability |
B. | large area requirement |
C. | variable power |
D. | high cost |
E. | None of the above |
Answer» D. high cost |
96. | Earth coal is |
A. | lignite |
B. | coal dust |
C. | black earth |
D. | wet coal |
E. | None of the above |
Answer» A. lignite |
97. | Barytes concrete is generally used in |
A. | nuclear power plants |
B. | construction of dams |
C. | foundations for heavy equipment |
D. | construction of cooling towers |
E. | None of the above |
Answer» A. nuclear power plants |
98. | The disadvantage of using solar evergy for power production is |
A. | Requirements of large area for harnessing solar energy |
B. | Energy available during day time only |
C. | Energy not available during cloudy weather |
D. | Initial cost is high |
E. | All of the above |
Answer» E. All of the above |
99. | Chain gate stokers cannot be used for |
A. | coal lumps |
B. | low ash content coals |
C. | high ash content coals |
D. | None of the above |
E. | None of the above |
Answer» C. high ash content coals |
101. | Sweet gas is free of | ||
A. | crabon dioxide | ||
B. | carbon monoxide | ||
C. | nitrogen | ||
D. | hydrogen sulphide | ||
E. | None of the above | ||
Answer» D. hydrogen sulphide | |||
102. | Maximum horse power of a steam locomotive is |
A. | 2500 |
B. | 5000 |
C. | 500 |
D. | 1500 |
E. | 100 |
Answer» D. 1500 |
103. | Pressure cables are used for |
A. | Low power factors |
B. | High current ratings |
C. | High KVA |
D. | High kW |
E. | Higher voltages |
Answer» E. Higher voltages |
104. | HRC fuses provide best protection against |
A. | Short circuits |
B. | Ligntning |
C. | Sparking |
D. | Fire |
E. | All of the above |
Answer» A. Short circuits |
105. | The fact that a conductor carries more current on the surface as compared to core is known as |
A. | skin effect |
B. | corona |
C. | permeability |
D. | unsymmetrical fault |
E. | None of the above |
Answer» A. skin effect |
106. | Diesel engine fuels are rated by |
A. | HUCR |
B. | Cetane number |
C. | Octane number |
D. | Calorific value |
E. | CFR number |
Answer» B. Cetane number |
107. | Which of the following area is preferred for solar thermal electric power plants? |
A. | Mountain tops |
B. | Hot arid zones |
C. | Coastal areas |
D. | High rainfall zones |
E. | None of the above |
Answer» B. Hot arid zones |
108. | The wavelength of green colour is nearly |
A. | 4000 A |
B. | 5500 A |
C. | 2500 A |
D. | 1000 A |
E. | 7500 A |
Answer» B. 5500 A |
109. | A module is a |
A. | newly installed solar cell |
B. | series – parallel arrangement of solar cells |
C. | a series of solar cells when not used for power generation |
D. | None of the above |
E. | None of the above |
Answer» B. series – parallel arrangement of solar cells |
110. | Lighite is |
A. | pure carbon |
B. | high calorific value coal |
C. | low calorific value coal |
D. | a vergetable origin liquid fuel |
E. | None of the above |
Answer» C. low calorific value coal |
111. | The disadvantage of transmission lines as compared to cables is |
A. | exposure to lightning |
B. | exposure to atmospheric hazards likes smoke, ice, etc. |
C. | inductive interference between power and communication circuits |
D. | All of the above |
E. | None of the above |
Answer» D. All of the above |
112. | During storm the live conductor of public electric supply breaks of down and touches the earth. The consequence will be |
A. | supply voltage will drop |
B. | supply voltage will increase |
C. | current will flow to earth |
D. | no current will flow in the conductor |
E. | None of the above |
Answer» C. current will flow to earth |
113. | Photovoltaic solar energy conversion system makes use of |
A. | fuel cells |
B. | solar cells |
C. | solar ponds |
D. | None of the above |
E. | None of the above |
Answer» B. solar cells |
114. | A photovoltaic cell converts |
A. | heat energy into mechanical energy |
B. | chemical energy into electrical energy |
C. | solar energy into electrical energy |
D. | electrical energy into chemical energy |
E. | None of the above |
Answer» C. solar energy into electrical energy |
115. | The average load factor of thermal power plants in India is |
A. | 80 to 95% |
B. | 50 to 60% |
C. | 100% |
D. | 20 to 30% |
E. | 35 to 40% |
Answer» B. 50 to 60% |
116. | The bundling of conductors is done primarily to |
A. | reduce reactance |
B. | increase reactance |
C. | increase radio interference |
D. | reduce radio interference |
E. | None of the above |
Answer» A. reduce reactance |
117. | Excess air requirement is more in case of |
A. | chain grate stokers |
B. | pulverized fuel burning |
C. | oil firing |
D. | gas firing |
E. | None of the above |
Answer» A. chain grate stokers |
118. | Which of the following is heavy oil? |
A. | Gasoline |
B. | Kerosene oil |
C. | Diesel oil |
D. | Bunker oil |
E. | None of the above |
Answer» D. Bunker oil |
119. | Hyperon has mass |
A. | greater than that of a proton and less than that of a deuteron |
B. | less than that of a proton and more than that of a deutron |
C. | more than that of a proton as well as deutron |
D. | less than that of a proton as well as deutron |
E. | None of the above |
Answer» A. greater than that of a proton and less than that of a deuteron |
120. | A ship is powered by |
A. | Steam turbine |
B. | Diesel turbine |
C. | Steam turbines, diesel engines, hydraulic turbines or nuclear reactors |
D. | Steam turbines, diesel engines hydraulic turbines |
E. | Steam turbines or diesel engines |
Answer» E. Steam turbines or diesel engines |
121. | A gas turbine works on |
A. | Regenerative cycle |
B. | Dual cycle |
C. | Brayton cycle |
D. | Rankine cycle |
E. | Carnot cycle |
Answer» C. Brayton cycle |
122. | Maximum permissible span for wooden poles is |
A. | 60 metres |
B. | 160 metres |
C. | 250 metres |
D. | 500 metres |
E. | None of the above |
Answer» A. 60 metres |
123. | Which of the following process is used for the production of alcohol? |
A. | Distillation |
B. | Destructive distillation |
C. | Cracking |
D. | Fermentation |
E. | None of the above |
Answer» D. Fermentation |
124. | The effect of corona is |
A. | increased energy loss |
B. | increased reactance |
C. | increased inductance |
D. | increased susceptance |
E. | None of the above |
Answer» A. increased energy loss |
126. | Grade of the coal is the same as | |||
A. | ultimate analysis | |||
B. | proximate analysis | |||
C. | orsat analysis | |||
D. | rank | |||
E. | None of the above | |||
Answer» D. rank | ||||
127. | Winds caused by greater solar heating of the earth’s surface near the equator than near the northern or southern poles, are known as |
A. | local winds |
B. | equatorial winds |
C. | planetary winds |
D. | trade winds |
E. | None of the above |
Answer» C. planetary winds |
128. | One barrel is nearly |
A. | 0.96 cubic metre |
B. | 0.44 cubic metre |
C. | 0.16 cubic metre |
D. | 0.013 cubic metre |
E. | None of the above |
Answer» C. 0.16 cubic metre |
129. | Solid or liquid particles of microscopic size which are suspended in air or another gas from what is known as |
A. | aerosol |
B. | hyperon |
C. | geognosy |
D. | eluvium |
E. | None of the above |
Answer» A. aerosol |
130. | The live storage of coal in power plant means |
A. | Purified coal |
B. | Storage of coal sufficient to meet hour demand for the plant. |
C. | Coal ready for combustion |
D. | Coal in transit |
E. | Preheated coal |
Answer» B. Storage of coal sufficient to meet hour demand for the plant. |
131. | Under no load conditions the current in a transmission line is due to |
A. | corona effects |
B. | capacitance of the line |
C. | back flow from earth |
D. | spinning reserve |
E. | None of the above |
Answer» B. capacitance of the line |
132. | The maximum number of generators in a power plant must be |
A. | Two |
B. | Odd |
C. | One |
D. | Even |
E. | Three |
Answer» A. Two |
133. | The area under the load curve represents |
A. | System voltage |
B. | Average demand |
C. | Maximum demand |
D. | Energy consumed |
E. | Current |
Answer» D. Energy consumed |
134. | All of the following are electrical mechanical storage systems EXCEPT |
A. | pumped hydro system |
B. | torsion bar system |
C. | super conducting coils |
D. | kinetic flywheels |
E. | None of the above |
Answer» C. super conducting coils |
135. | Thermal storage of energy is possible in the form of |
A. | sensible heat |
B. | latent heat |
C. | chemical reaction |
D. | Any of the above |
E. | None of the above |
Answer» D. Any of the above |
136. | Out of the following which one is not a unconventional source of energy? |
A. | Magneto hydrodynamic generator |
B. | Nuclear energy |
C. | Wind power |
D. | Geothermal energy |
E. | Tidal power |
Answer» B. Nuclear energy |
137. | In which of the following state manufacturing unit of M/S Bharat Heavy Electricals Ltd. Is not located? |
A. | Rajasthan |
B. | Karnataka |
C. | Andhra Pardesh |
D. | U.P. |
E. | M.P. |
Answer» A. Rajasthan |
138. | The value of an equipment at the end of its useful life is known as |
A. | Useful value |
B. | Obsolescence value |
C. | Demand value |
D. | Scrap value |
E. | Replacement value |
Answer» D. Scrap value |
139. | The effect of electric shock on human body depends on |
A. | voltage |
B. | Current |
C. | Duration of contact |
D. | All of the above |
E. | None of the above |
Answer» D. All of the above |
140. | Which of the following will need the lower level of illumination? |
A. | Green rooms |
B. | Railway platform |
C. | Auditoriums |
D. | Hospital wards |
E. | Display |
Answer» B. Railway platform |
141. | The calorific value of coal gas is expected to be around |
A. | 1500 kcal/m3 |
B. | 500 kcal/m3 |
C. | 2500 kcal/m3 |
D. | 7500 kcal/m3 |
E. | 5000 kcal/m3 |
Answer» D. 7500 kcal/m3 |
142. | A super-thermal power station has |
A. | total generating capacity of over 2000 MW |
B. | generating units running at above the critical steam |
C. | steam generated at critical pressure |
D. | unity power factor |
E. | None of the above |
Answer» A. total generating capacity of over 2000 MW |
143. | A jet aircraft is powered by |
A. | Batteries |
B. | Petrol engines |
C. | Solar cells |
D. | Gas turbine |
E. | Diesel engines |
Answer» D. Gas turbine |
144. | pF number refers to |
A. | acidic/alkaline water |
B. | energy with which water is held in the soil |
C. | decomposition of molecules caused by the absorption of light |
D. | smog produced by the action of sunlight on the pollutants |
E. | None of the above |
Answer» B. energy with which water is held in the soil |
145. | All of the following plants are suitable for peak load EXCEPT |
A. | Gas turbine plant |
B. | Pumped storage plant |
C. | Diesel engine plant |
D. | Nuclear power plant |
E. | All of the above |
Answer» D. Nuclear power plant |
146. | One calorie is the same as |
A. | 4.18 joules |
B. | 4.11 watts |
C. | 1 dyne |
D. | 1 dyne-sec |
E. | 1 watt |
Answer» A. 4.18 joules |
147. | Liquids lighter than water (such as petroleum oils) have API gravities numerically |
A. | less than 1.0 |
B. | greater than 1.0 |
C. | greater than 10 |
D. | around 100 |
E. | None of the above |
Answer» A. less than 1.0 |
148. | Most of the thermal power plants in India are using |
A. | bagasse as fuel |
B. | lignite as fuel |
C. | pulverized fuel |
D. | peat as fuel |
E. | None of the above |
Answer» C. pulverized fuel |
149. | The percentage of carbon in anthracite is generally |
A. | more than 90% |
B. | around 75% |
C. | between 50% and 70% |
D. | below 50% |
E. | None of the above |
Answer» A. more than 90% |
151. | Death is almost certain when the current through human body is | |||
A. | 100 milli-amperes | |||
B. | 10 micro-amperes | |||
C. | 25 micro-amperes | |||
D. | 100 micro-amperes | |||
E. | 10 milli-amperes | |||
Answer» A. 100 milli-amperes | ||||
152. | API gravity of water is taken as |
A. | zero |
B. | 1 |
C. | 10 |
D. | 100 |
E. | None of the above |
Answer» B. 1 |
153. | Which of the following power plant can generate power at unpredictable or uncontrolled times? |
A. | Wind power plant |
B. | Tidal power plant |
C. | Solar power plant |
D. | All of the above |
E. | None of the above |
Answer» D. All of the above |
154. | Turnaround efficiency of pumped hydro schemes seldom exceeds |
A. | 10% |
B. | 15% |
C. | 25% |
D. | 65% |
E. | None of the above |
Answer» D. 65% |
155. | Standby losses are least in case of |
A. | Gas turbine power plant |
B. | Diesel engine power plant |
C. | Hydro-electric power plant |
D. | Steam power plant |
E. | Nuclear power plant |
Answer» C. Hydro-electric power plant |
156. | Approximately how many kg of air are required for the combustion of one kg of diesel oil? |
A. | 15 kg |
B. | 25 kg |
C. | 1 kg |
D. | 35 kg |
E. | 5 kg |
Answer» A. 15 kg |
157. | Which of the following variety of coal will have highest ash content |
A. | Grade I steam coal |
B. | Bituminous coal |
C. | Coking coal |
D. | Bengal coal |
E. | Lignite |
Answer» E. Lignite |
158. | The effect of wind pressure is more predominant on |
A. | transmission lines |
B. | neutral wires |
C. | insulators |
D. | supporting towers |
E. | None of the above |
Answer» D. supporting towers |
159. | Argillaceous rocks have |
A. | high clay content |
B. | high moisture content |
C. | low moisture content |
D. | low mineral content |
E. | None of the above |
Answer» A. high clay content |
160. | Beaufort scale is graded from 0 to |
A. | 10 |
B. | 12 |
C. | 22 |
D. | 100 |
E. | None of the above |
Answer» B. 12 |
161. | In hydrothermal source of geothermal energy |
A. | hot water or steam is available |
B. | hot gases are available |
C. | molten lava is available |
D. | none of the above |
E. | None of the above |
Answer» A. hot water or steam is available |
162. | Presence of ozone as a result of corona is harmful because |
A. | it gives bad odour |
B. | it corrodes the material |
C. | it transfers energy to the ground |
D. | it reduces power factor |
E. | None of the above |
Answer» B. it corrodes the material |
163. | The source of energy for satellite is |
A. | battery |
B. | solar cell |
C. | cryogenic storage |
D. | Any of the above |
E. | None of the above |
Answer» B. solar cell |
164. | Which type of power plant will be preferred for a location in Bihar? |
A. | Nuclear power plant |
B. | Hydro-electric power plant |
C. | Thermal power plant |
D. | Solar power plant |
E. | None of the above |
Answer» C. Thermal power plant |
165. | Petrothermal systems are composed of hot dry rock with |
A. | no underground water |
B. | large underground water |
C. | petrochemicals |
D. | dense gases |
E. | None of the above |
Answer» A. no underground water |
166. | The tax imposed on power supplied to consumers is known as |
A. | excise duty |
B. | sales tax |
C. | toll tax |
D. | electricity duty |
E. | None of the above |
Answer» D. electricity duty |
167. | The maximum theoretical efficiencies of solar cells could be around |
A. | 99% |
B. | 60% |
C. | 48% |
D. | 1% |
E. | None of the above |
Answer» C. 48% |
168. | Heavy water production plants in India are located at all the following places EXCEPT |
A. | Nangal |
B. | Bombay |
C. | Baroda |
D. | Tuticorin |
E. | None of the above |
Answer» B. Bombay |
169. | Presence of sand in geopressured water is likely to cause problems of |
A. | erosion |
B. | heat exchange |
C. | water circulation |
D. | All of the above |
E. | None of the above |
Answer» D. All of the above |
170. | Highly skilled manpower is needed for the maintendance of which of the following power plants? |
A. | Steam power plant |
B. | Diesel engine power plant |
C. | Nuclear power plant |
D. | Gas turbine power plant |
E. | Hydro-electric power plant |
Answer» C. Nuclear power plant |
171. | The power loss in an overhead transmission line is mainly due to |
A. | Line resistance |
B. | Line inductance |
C. | Heat loss |
D. | Magnetic loss |
E. | All of the above |
Answer» A. Line resistance |
172. | Benefication process is mainly used for |
A. | coals |
B. | oils |
C. | nuclides |
D. | minerals |
E. | None of the above |
Answer» A. coals |
173. | For a 66 kV transmission line having span of 200 metres between towers, the approximate sag will be |
A. | 0.02 m |
B. | 0.2 m |
C. | 2 m |
D. | 20 m |
E. | None of the above |
Answer» C. 2 m |
174. | Which of following converts thermal energy to kinetic energy? |
A. | Thermocouple |
B. | Storage battery |
C. | Fuel cell |
D. | Rocket |
E. | None of the above |
Answer» D. Rocket |
176. | First aid for an electric shock victim is | |||
A. | Pouring water on body | |||
B. | Artificial respiration | |||
C. | Massage | |||
D. | Bandage | |||
E. | Rubbing the skin | |||
Answer» B. Artificial respiration | ||||
177. | A turbocharger is a part of |
A. | Thermal power plant |
B. | Nuclear power plant |
C. | Diesel engine power plant |
D. | Gas turbine power plant |
E. | Hydro-electric power plant |
Answer» C. Diesel engine power plant |
178. | Capacity factor and load factor become identical when |
A. | peak load is equal to the capacity of the plant |
B. | average load is half the capacity of the plant |
C. | average load is same as peak load |
D. | group diversity factor is equal to peak diversity factor |
E. | None of the above |
Answer» A. peak load is equal to the capacity of the plant |
179. | The insulation material for a cable should have |
A. | High dielectric strength |
B. | High inechanical strength |
C. | Non-inflammability |
D. | Low cost |
E. | All of the above |
Answer» E. All of the above |
180. | Marsh gas is |
A. | a mixture of gaseous hydrocarbons produced from coal or oil |
B. | a hy-product of blast furnace |
C. | low calorific value gas containing carbon monoxide and steam |
D. | same as methane |
E. | None of the above |
Answer» D. same as methane |
181. | The main advantage of ac transmission system over dc transmission system is |
A. | easy transmission |
B. | less insulation problems |
C. | less problems of instability |
D. | less losses in transmission over long distances |
E. | None of the above |
Answer» D. less losses in transmission over long distances |
182. | In geopressured systems, when brine is available as the source of energy, the power is generated using |
A. | heat exhangers |
B. | exhaust calorimeters |
C. | economisers |
D. | steam traps |
E. | None of the above |
Answer» A. heat exhangers |
183. | Stability of a system is least affected by |
A. | reactance of line |
B. | losses |
C. | reactance of generator |
D. | output forque |
E. | None of the above |
Answer» B. losses |
184. | Steam pressure of super-thermal power plant is |
A. | 15 kg/cm2 |
B. | 200 kg/cm2 |
C. | 100 kg/cm2 |
D. | 170 kg/cm2 |
E. | 50 kg/cm2 |
Answer» D. 170 kg/cm2 |
185. | While top surface of an overfeed stoker consists of |
A. | coal dust, ash |
B. | ash, coal dust |
C. | green coal, incandescent coke |
D. | incandescent coke, green coal |
E. | None of the above |
Answer» C. green coal, incandescent coke |
186. | The minimum clearance of low and medium transmission lines from ground across streets is |
A. | 2 metres |
B. | 4 metres |
C. | 6 metres |
D. | 8 metres |
E. | None of the above |
Answer» C. 6 metres |
187. | The minimum demand on a power station is 10 MW. If the annular load factor is 40%, total evergy generated per year will be |
A. | 35.04 x 108 kWh |
B. | 35.04 x 107 kWh |
C. | 35.04 x 106 kWh |
D. | 35.04 x 105 kWh |
E. | None of the above |
Answer» C. 35.04 x 106 kWh |
188. | Spot the odd one out |
A. | Colloidal fuel |
B. | Acid sludge |
C. | Tar |
D. | Bark |
E. | None of the above |
Answer» D. Bark |
189. | Ebb current is |
A. | the same as eddy current |
B. | the movement of the tidal current away from shore or down a tidal stream |
C. | the removal by screen of undesirable fine materials from broken ore |
D. | none of the above |
E. | None of the above |
Answer» B. the movement of the tidal current away from shore or down a tidal stream |
190. | The area under load curve divided by maximum demand represents |
A. | Load factor |
B. | Diversity factor |
C. | Connected load |
D. | Average load |
E. | None of the above |
Answer» E. None of the above |
191. | Which of the following enters the super heater of a boiler? |
A. | Wet steam |
B. | Superheated steam |
C. | Hot water |
D. | Dry steam |
E. | Cold water |
Answer» D. Dry steam |
192. | In a diesel engine the governor controls |
A. | fuel volume |
B. | fuel temperature |
C. | fuel flow rate |
D. | fuel pressure |
E. | None of the above |
Answer» C. fuel flow rate |
193. | Which arrangement of poles is used for the installation of transformers and circuit breakers? |
A. | I type |
B. | J type |
C. | H type |
D. | L type |
E. | None of the above |
Answer» C. H type |
194. | Single peak in the load curve means |
A. | unity load factor |
B. | high load factor |
C. | 0.5 load factor |
D. | low load factor |
E. | None of the above |
Answer» D. low load factor |
195. | Of all the different types of conventional power plants, technological advancements are maximum in |
A. | thermal power plants |
B. | hydro-power plants |
C. | gas turbine power plants |
D. | nuclear power plants |
E. | None of the above |
Answer» D. nuclear power plants |
196. | Heliochemical process is the process by which |
A. | solar energy is utilized through photosynthesis |
B. | neutron energy is converted into thermal energy |
C. | geothermal energy is converted into electrical energy |
D. | wind energy is converted into electrical energy |
E. | None of the above |
Answer» A. solar energy is utilized through photosynthesis |
197. | The cost of fuel is least in case of |
A. | Steam power plant |
B. | Nuclear power plant |
C. | Gas turbine power plants |
D. | Diesel engine power plant |
E. | Hydro-electric power plant |
Answer» E. Hydro-electric power plant |
198. | Due to burning of one kg of pure carbon with a minimum quantity of air required, the percentage of carbondioxide in the exhaust gases would be |
A. | 11.50% |
B. | 58% |
C. | 29% |
D. | 10% |
E. | 100% |
Answer» C. 29% |
199. | Sour crude |
A. | is corrosive when heated |
B. | evolves significant amounts of hydrogen sulphide on distillation |
C. | produces light fraction which require sweetening |
D. | All of the above |
E. | None of the above |
Answer» D. All of the above |
201. | Which of the following relation is incorrect? | ||
A. | Capacity factor = Utilization factor x Load factor | ||
B. | Load factor x Maximum load = Average load | ||
C. | Demand factor x Connected load = Maximum demand | ||
D. | None of the above | ||
E. | None of the above | ||
Answer» D. None of the above | |||
202. | The useful life of static capacitor can be expected to be |
A. | 6 to 8 months |
B. | 50 to 100 years |
C. | 1 to 2 years |
D. | 8 to 10 years |
E. | 2 to 3 months |
Answer» D. 8 to 10 years |
203. | The fixed cost of a power plant depends on |
A. | Installed capacity |
B. | Demand factor |
C. | Diversity factor |
D. | Average demand |
E. | All of the above |
Answer» A. Installed capacity |
204. | In the geysers steam is continuously vented through fissures in the ground. These vents are called |
A. | vent holes |
B. | dot holes |
C. | fumaroles |
D. | sunspots |
E. | None of the above |
Answer» C. fumaroles |
205. | One kilowatt hour is nearly equal to |
A. | 3400 B.T.U. |
B. | 3.4 B.T.U. |
C. | 340 B.T.U. |
D. | 34 B.T.U. |
E. | 34000 B.T.U. |
Answer» A. 3400 B.T.U. |
206. | Total load transmitted through a 3-phase transmission line is 10,000 kW at 0.8 power factor lagging. The I2 R losses are 900 kW. The efficiency of transmission line is |
A. | 60% |
B. | 90% |
C. | 95% |
D. | 99% |
E. | None of the above |
Answer» B. 90% |
207. | A draft tube is a part of which power plants? |
A. | Diesel engine power plant |
B. | Gas turbine power plant |
C. | Steam power plant |
D. | Hydro-electric power plant |
E. | All of the above |
Answer» D. Hydro-electric power plant |
208. | Material generally used for bus bars is |
A. | cast iron |
B. | tungsten |
C. | Stainless steel |
D. | copper |
E. | None of the above |
Answer» D. copper |
209. | The calorific value of which of the following files is expected to be nearly equal? |
A. | Coal gas and lignite coal |
B. | Natural gas and coal gas |
C. | Anthracite coal and lignite |
D. | Petrol and diesel oil |
E. | None of the above |
Answer» D. Petrol and diesel oil |
210. | The critical pressure water is |
A. | 100 kg/cm2 |
B. | More than 200 kg/cm2 |
C. | Less than 200 kg/cm2 |
D. | 1 atm |
E. | 150 kg/cm2 |
Answer» B. More than 200 kg/cm2 |
211. | Cleat is |
A. | main joint in a coal seam along which it breaks most easily |
B. | floor of a coal seam |
C. | carbon and sulphur compound |
D. | crude oil containing low percentage of sulphur |
E. | None of the above |
Answer» A. main joint in a coal seam along which it breaks most easily |
212. | The disadvantage of constant voltage transmission is |
A. | short circuit current of the system is increased |
B. | low power factor in heavy loads |
C. | large conductor area is required for same power transmission |
D. | All of the above |
E. | None of the above |
Answer» A. short circuit current of the system is increased |
213. | Which of the following is a petroleum fuel? |
A. | Benzol |
B. | Methyl alcohol |
C. | Ethyl alcohol |
D. | Naphta |
E. | None of the above |
Answer» D. Naphta |
214. | Baryon is one of the class of heavy elementary particles that includes |
A. | hyperons |
B. | neutrons |
C. | protons |
D. | All of the above |
E. | None of the above |
Answer» D. All of the above |
215. | A single unit of 50 MW is generally not available with which type of power plant? |
A. | Diesel engine power plant |
B. | Gas turbine power plant |
C. | Steam power plant |
D. | Nuclear power plant |
E. | Hydro-electric power plant |
Answer» A. Diesel engine power plant |
216. | In the areas where snowfall is frequent, under worst conditions, the thickness of ice on a conductor is |
A. | 1.25 cm |
B. | 2.75 cm |
C. | 4.75 cm |
D. | 6.25 cm |
E. | None of the above |
Answer» A. 1.25 cm |
217. | Most of the generators in thermal power plants run at |
A. | 15000 rpm |
B. | 3000 rpm |
C. | 750 rpm |
D. | 1000 rpm |
E. | 1500 rpm |
Answer» B. 3000 rpm |
218. | Which of the following state in India is relatively rich in coal deposits? |
A. | Kerala |
B. | Andhra Pradesh |
C. | U.P. |
D. | Rajasthan |
E. | Bihar |
Answer» E. Bihar |
219. | Corona effect can be detected by |
A. | hissing sound |
B. | faint luminous glow of bluish colour |
C. | presence of ozone detected by odour |
D. | all of the above |
E. | None of the above |
Answer» D. all of the above |
220. | Least overall efficiency can be expected in which type of power plant? |
A. | Gas turbine power plant |
B. | Steam power plant |
C. | Hydro-electric power plant |
D. | Diesel engine power plant |
E. | Nuclear power plant |
Answer» B. Steam power plant |
221. | Which of the following engine has the highest air-fuel ratio? |
A. | Petrol engine |
B. | All above has got nearly same air fuel ratio |
C. | Gas turbine |
D. | Gas engine |
E. | Diesel engine |
Answer» C. Gas turbine |
222. | Visible spectrum of light has wavelength in the range |
A. | 4000 to 7000 A |
B. | 100 to 400 A |
C. | 40,000 to 70,000 A |
D. | 14,000 to 17,000 A |
E. | 10 to 40 A |
Answer» A. 4000 to 7000 A |
223. | Which of the following equipment is not installed in a substation? |
A. | Exciters |
B. | Series capacitors |
C. | Shunt reactors |
D. | Voltage transformers |
E. | None of the above |
Answer» A. Exciters |
224. | Which of the following equipment has power factor closer to unity |
A. | GLS lamp |
B. | Single phase capacitor motor |
C. | Induction motor |
D. | Fluorescent lamp |
E. | Carbon arc lamp |
Answer» A. GLS lamp |
226. | Power factor is expected to be highest in case of | ||
A. | Carbon arc lamp | ||
B. | Tube lights | ||
C. | Sodium lamps | ||
D. | GLS lamp | ||
E. | Mercury vapour lamp | ||
Answer» D. GLS lamp | |||
227. | Low grade fuels have |
A. | Low moisture constant |
B. | Low ash content |
C. | Low calorific value |
D. | Low sulphur content |
E. | All of the above |
Answer» C. Low calorific value |
228. | The protection against lightning is provided by |
A. | Earthing screen |
B. | Overhead ground wires |
C. | Lightning arresters |
D. | Surge diverters |
E. | Any of the above |
Answer» E. Any of the above |
229. | Barn is |
A. | spent fuel from a nuclear reactor |
B. | a unit of area |
C. | an electronic instrument for rapid counting of radiations |
D. | a coal that does not form coke |
E. | None of the above |
Answer» B. a unit of area |
230. | The major share of power in India is provided by which of the following type of power plant? |
A. | Gas turbine power plants |
B. | Hydro-electric power plant |
C. | Diesel engine power plant |
D. | Nuclear power plant |
E. | Steam power plant |
Answer» E. Steam power plant |
231. | Batteries used for electrical energy storage are |
A. | Leclanche cells |
B. | Edison cells |
C. | Lead acid cells |
D. | Any of the above |
E. | None of the above |
Answer» C. Lead acid cells |
232. | Which of the following converts electrical energy to radiant heat? |
A. | Solat cell |
B. | Storage battery |
C. | Wankel engine |
D. | Incandescent lamp |
E. | None of the above |
Answer» D. Incandescent lamp |
233. | The most economic voltage for transmitting given power over a known distance by overhead transmission lines is approximately |
A. | 0.6 kV/km |
B. | 1.6 kV/km |
C. | 2.6 kV/km |
D. | 3.6 kV/km |
E. | None of the above |
Answer» A. 0.6 kV/km |
234. | Steel poles for transmission lines need protection against |
A. | termites |
B. | borer |
C. | corrosion |
D. | All of the above |
E. | None of the above |
Answer» C. corrosion |
235. | Integrated demand is |
A. | the demand averaged over a specified period |
B. | the joint-demand of several consumers |
C. | supplementary demand of various consumers |
D. | None of the above |
E. | None of the above |
Answer» A. the demand averaged over a specified period |
236. | Osmotic energy conversion involves energy production from |
A. | low boiling point liquids |
B. | low vapour pressure liquids |
C. | miscible liquids |
D. | salt water |
E. | None of the above |
Answer» D. salt water |
237. | Pin insulators are normally used upto voltages of about |
A. | 100 kV |
B. | 66 kV |
C. | 33 kV |
D. | 25 kV |
E. | None of the above |
Answer» D. 25 kV |
238. | A generating station is to supply four regions of loads with peak demands of 10 MW, 15 MW, 20 MW and 30 MW. If the diversity factor is 1.5 the maximum demand on the station is |
A. | 30 MW |
B. | 60 MW |
C. | 70 MW |
D. | 50 MW |
E. | 45 MW |
Answer» D. 50 MW |
239. | The power supplied to domestic consumers is at 220 volts. This represents |
A. | Peak value of voltage |
B. | Mean value of voltage |
C. | rms value of voltage |
D. | Any of the above |
E. | None of the above |
Answer» C. rms value of voltage |
240. | Diversity factor has direct effect on the |
A. | fixed |
B. | variable |
C. | fixed and variable |
E. | None of the above |
Answer» A. fixed |
241. | Gas turbine power plants are being established at all of the following places EXCEPT |
A. | Kawas |
B. | Anta |
C. | Auraiya |
D. | Jagdishpur |
E. | None of the above |
Answer» D. Jagdishpur |
242. | Which of the following gives nearly monochromatic light? |
A. | Sodium vapour lamp |
B. | GLS lamp |
C. | Fluurescent tube |
D. | Mercury vapour lamp |
E. | None of the above |
Answer» A. Sodium vapour lamp |
243. | The permissible pH value of water of boilers is |
A. | Less than 14 |
B. | 1 |
C. | Slightly more than 7 |
D. | 7 |
E. | 5 |
Answer» C. Slightly more than 7 |
244. | For a power plant, the cost of labour is considered as |
A. | fixed |
B. | variable |
C. | progressive, non-progressive |
D. | major, minor |
E. | None of the above |
Answer» B. variable |
245. | For extinguishing electrical fires |
A. | Carbondioxide fire extinguisher should be used |
B. | Rubber pieces should be thrown |
C. | Water should be sprinkled |
D. | Carbon tetrachloride fire extinguisher should be used |
E. | Conductors should be erthed |
Answer» D. Carbon tetrachloride fire extinguisher should be used |
246. | Skin effect results in |
A. | reduced effective resistance but increased effective internal reactance of the conductor |
B. | increased effective resistance but reduced effective internal reactance of the conductor |
C. | reduced effective resistance as well as effective internal reactance |
D. | increased effective resistance as well as effective internal reactance |
E. | None of the above |
Answer» B. increased effective resistance but reduced effective internal reactance of the conductor |
247. | Which of the following contributes to the improvement of efficiency of Rankine cycle in a thermal power plant? |
A. | Use of high pressures |
B. | Reheating of steam at some intermediate stage |
C. | Regeneration |
D. | All of the above |
E. | None of the above |
Answer» D. All of the above |
248. | Which of the following disadvantages occurs due to low power factor? |
A. | Greater conductor size |
B. | Poor voltage regulation |
C. | Large copper losses |
D. | Large KVA rating of transformers |
E. | All of the above |
Answer» E. All of the above |
249. | Which of the following statement is incorrect? |
A. | As the temperature rises the tension in the transmission line decreases |
B. | As the temperature rises the sag in transmission lines reduces |
C. | Tension and sag in transmission lines are complementary to each other |
E. | None of the above |
Answer» C. Tension and sag in transmission lines are complementary to each other |
251. | In pumped storage plant | |||
A. | Power is produced by pumps | |||
B. | Water is stored by pumping to high pressures | |||
C. | Water is recirculated through turbines | |||
D. | Downstream water is pumped upstream during off-load periods | |||
E. | Pressure accumulators are used | |||
Answer» D. Downstream water is pumped upstream during off-load periods | ||||
252. | The effect of corona can be reduced by |
A. | Increasing the conductor size and reducing the spacing between the conductors |
B. | Increasing the conductor size and also by increasing the spacing between the conductors |
C. | Reducing the conductor size and increasing the spacing between conductors |
D. | Reducing the conductor size as well as spacing between the conductors |
E. | None of the above |
Answer» B. Increasing the conductor size and also by increasing the spacing between the conductors |
253. | Which of the following fuel consists almost entirely of fixed carbon and ash? |
A. | Lignite |
B. | peat |
C. | wood charcoal |
D. | coke |
E. | None of the above |
Answer» D. coke |
254. | ACSR conductor implies |
A. | All conductors surface treated and realigned |
B. | Anode current sinusoidally run |
C. | Anodised core smoothly run |
D. | Aluminium conductor steel reinforced |
E. | None of the above |
Answer» D. Aluminium conductor steel reinforced |
255. | Turnaround efficiency of battery energy storage system is around |
A. | 75 percent |
B. | 50 percent |
C. | 25 percent |
D. | 10 percent |
E. | None of the above |
Answer» A. 75 percent |
256. | Coal broken into angular fragments is known as |
A. | coal briquettes |
B. | coal breccia |
C. | coal bank |
D. | coal auger |
E. | None of the above |
Answer» B. coal breccia |
257. | A graphical representation of discharge and time is known as |
A. | Load duration curve |
B. | Monograph |
C. | Hydrograph |
D. | Load curve |
E. | Hectograph |
Answer» C. Hydrograph |
258. | Pulverized coal is fed to the boiler through |
A. | stokers |
B. | retorts |
C. | fans |
D. | burners |
E. | None of the above |
Answer» D. burners |
259. | In solar thermal conversion systems the solar heat is transferred to |
A. | water – steam |
B. | liquid metals |
C. | molten salts |
D. | any of the above |
E. | None of the above |
Answer» D. any of the above |
260. | Fixed carbon in case of bituminous coals is less than |
A. | 70% |
B. | 50% |
C. | 35% |
D. | 15% |
E. | None of the above |
Answer» A. 70% |
261. | Existence of which gs in atmosphere causes green house effect? |
A. | Carbon dioxide |
B. | Hydrogen sulphide |
C. | Nitrogen |
D. | Hydrogen |
E. | None of the above |
Answer» A. Carbon dioxide |
262. | In a diesel engine, the consumption of diesel oil per BHP per hour is nearly |
A. | 10 grams |
B. | 200 grams |
C. | 1250 grams |
D. | 100 grams |
E. | 850 grams |
Answer» B. 200 grams |
263. | First geothermal energy plant in India was tried at |
A. | Himachal Pradesh |
B. | Rajasthan |
C. | Bihar |
D. | Kerala |
E. | None of the above |
Answer» A. Himachal Pradesh |
264. | The formula for Cetane is |
A. | C6H15 |
B. | C10H24 |
C. | C10H12 |
D. | C16H34 |
E. | C12H32 |
Answer» D. C16H34 |
265. | The vacuum inside a incandescent lamp is of the order of |
A. | 10-5 mm Hg |
B. | 10-2 mm Hg |
C. | 10-4 mm Hg |
D. | 10-3 mm Hg |
E. | 10-6 mm Hg |
Answer» C. 10-4 mm Hg |
266. | Humacite is the name associated with |
A. | lignites |
B. | radioactive minerals |
C. | bitumins |
D. | refrigerants |
E. | None of the above |
Answer» C. bitumins |
267. | Tidal energy plant in India is being located at |
A. | Kerala |
B. | Gujarat |
C. | Orissa |
D. | Tamil Nadu |
E. | None of the above |
Answer» B. Gujarat |
268. | When pulverised fuel is not used the equipment used for feeding coal to the boiler is |
A. | Stoker |
B. | Regenerator |
C. | Heater |
D. | Burner |
E. | Feed pump |
Answer» A. Stoker |
269. | In case the characteristic impedance of the line is equal to the load impedance |
A. | all the energy will pass to the earth |
B. | all the energy will be lost in transmission losses |
C. | the system will resonatc badly |
D. | all the energy sent will be absorbed by the load |
E. | None of the above |
Answer» D. all the energy sent will be absorbed by the load |
270. | The specific gravity of aluminium is |
A. | 3.71 |
B. | 5.71 |
C. | 1.71 |
D. | 2.71 |
E. | 4.71 |
Answer» D. 2.71 |
271. | The illumination level in the houses is usually in the range |
A. | 400 to 650 lumens/m2 |
B. | 2500 to 3000 lumens/m2 |
C. | 1200 to 1600 lumens/m2 |
D. | 100 to 1400 lumens/m2 |
E. | 10 to 20 lumens/m2 |
Answer» D. 100 to 1400 lumens/m2 |
272. | For under water movement of a submarine the power is provided by |
A. | Tidal energy |
B. | Solar energy |
C. | Thermoionic converters |
D. | Geothermal energy |
E. | Batteries |
Answer» E. Batteries |
273. | For constant voltage transmission, the drop is compensated by installing |
A. | synchronous motors |
B. | capacitors |
C. | inductors |
D. | All of the above |
E. | None of the above |
Answer» A. synchronous motors |
274. | The total power of a wind stream is proportional to |
A. | velocity of stream |
B. | (velocity of stream)2 |
C. | (velocity of stream)3 |
E. | None of the above |
Answer» C. (velocity of stream)3 |
276. | The string efficiency in an ac system is | |||
A. | 100% | |||
B. | Zero | |||
C. | 50% | |||
D. | 25% | |||
E. | 70.70% | |||
Answer» A. 100% | ||||
277. | In a thermal power plant, among the variable costs, fuel accounts for nearly |
A. | 20 to 25 percent of total cost |
B. | 30 to 50 percent of total cost |
C. | 75 to 80 percent of total cost |
D. | 90 to 98 percent of total cost |
E. | None of the above |
Answer» C. 75 to 80 percent of total cost |
278. | Alternating current power is transmitted at high voltages |
A. | to safeguard against pilferage |
B. | to minimise transmission losses |
C. | to reduce cost of generation |
D. | to make the system reliable |
E. | None of the above |
Answer» B. to minimise transmission losses |
279. | For low head and high discharge the hydraulic turbine preferred is |
A. | Jonval turbine |
B. | Francis turbine |
C. | Kaplan turbine |
D. | Fourneyron turbine |
E. | Pelton wheel |
Answer» C. Kaplan turbine |
280. | The initial cost of an equipment is Rs. 20 lakhs and depreciated cost after ten years is Rs. 15 lakhs. The useful life of the equipment is |
A. | 5 years |
B. | 15 years |
C. | 20 years |
D. | Cannot be determined on the basis of the information provided |
E. | 10 years |
Answer» D. Cannot be determined on the basis of the information provided |
281. | The output of a solar cell is of the order of |
A. | 0.1 W |
B. | 0.5 W |
C. | 1 W |
D. | 5 W |
E. | None of the above |
Answer» B. 0.5 W |
282. | Radio carbon has half life of |
A. | 17 years |
B. | 117 years |
C. | 557 years |
D. | 5770 years |
E. | None of the above |
Answer» D. 5770 years |
283. | Candela is the unit of |
A. | Luminous flux |
B. | Luminous intensity |
C. | Wavelength |
D. | Brightness |
E. | None of the above |
Answer» B. Luminous intensity |
284. | Direct conversion of heat into electric power is possible through |
A. | batteries |
B. | fuel cells |
C. | thermionic converters |
D. | All of the above |
E. | None of the above |
Answer» C. thermionic converters |
285. | Bottoming cycle is common in |
A. | cement plants |
B. | sugar millls |
C. | paper mills |
D. | All of the above |
E. | None of the above |
Answer» A. cement plants |
286. | Which of the following domestic utility item consumes maximum power? |
A. | Ceiling fan |
B. | Exhaust fan |
C. | Cooking range |
D. | Refrigerator |
E. | Mixer grinder |
Answer» C. Cooking range |
287. | Compressed air is required generally in which of the following power plants? |
A. | Nuclear power plant |
B. | Hydro-electric power plant |
C. | Steam power plant |
D. | Diesel engine power plant |
E. | All of the above |
Answer» D. Diesel engine power plant |
288. | In steam power plants exhaust steam from turbine goes to |
A. | cooling tower |
B. | economiser |
C. | condenser |
D. | air preheater |
E. | None of the above |
Answer» C. condenser |
289. | Satellites are powered by |
A. | Batteries |
B. | Solar cells |
C. | Photo electric cells |
D. | Thermo-electric generators |
E. | Thermoionic converters |
Answer» B. Solar cells |
290. | The unit of luminous flux is |
A. | Steradian |
B. | Candela |
C. | Lumen |
D. | Lux |
E. | None of the above |
Answer» C. Lumen |
291. | Out of the following system of distribution, which system offers the best economy? |
A. | Direct current system |
B. | AC single phase system |
C. | AC 3 phase 3 wire system |
D. | AC 3 phase 4 wire system |
E. | None of the above |
Answer» A. Direct current system |
292. | Guard ring transmission line |
A. | improves power factor |
B. | reduces earth capacitance of the lowest unit |
C. | reduces transmission losses |
D. | improves regulation |
E. | None of the above |
Answer» B. reduces earth capacitance of the lowest unit |
293. | If the capacitance between two conductors of a 3 phse line is 4 |
A. | 2 |
B. | 4 |
C. | 8 |
D. | 12 |
E. | All of the above |
Answer» B. 4 |
294. | The calorific value of lignite is expected to be around |
A. | 10,000 kcal/kg |
B. | 5000 kcal/kg |
C. | 1000 kcal/kg |
D. | 1500 kcal/kg |
E. | 2500 kcal/kg |
Answer» B. 5000 kcal/kg |
295. | Metals approach superconductivity condition |
A. | at high temperatures |
B. | at melting point |
C. | near 0?C |
D. | near absolute zero |
E. | None of the above |
Answer» D. near absolute zero |
296. | Diesel locomotives in India are manufactured at |
A. | Varanasi |
B. | Ajmer |
C. | Parambur |
D. | Chitranjan |
E. | Bangalore |
Answer» A. Varanasi |
297. | Low utilization factor for a power plant indicates that |
A. | plant is under maintendance |
B. | plant is used for base load only |
C. | plant is used for standby purpose only |
D. | plant is used for peak load as well as base load |
E. | None of the above |
Answer» C. plant is used for standby purpose only |
298. | Which relay is used on transmission lines? |
A. | Thermal relay |
B. | Buchholz relay |
C. | MHO relay |
D. | Reactance relay |
E. | None of the above |
Answer» C. MHO relay |
299. | Which distribution system is more reliable? |
A. | Ring main system |
B. | Tree system |
C. | Radial system |
D. | All are equally reliable |
E. | None of the above |
Answer» A. Ring main system |
301. | When the power is to be transmitted over a distance of 580 km, the transmission voltage should be in the range | |||
A. | 33 kV – 66 kV | |||
B. | 66 kV – 100 kV | |||
C. | 110 kV – 150 kV | |||
D. | 150 kV – 200 kV | |||
E. | None of the above | |||
Answer» D. 150 kV – 200 kV | ||||
302. | Geothermal energy is |
A. | a renewable energy source |
B. | an alternative energy source |
C. | an inexhaustible energy source |
D. | any of the above |
E. | None of the above |
Answer» D. any of the above |
303. | In a power plant, if the system voltage is dropped by 10 percent, the load will drop by about |
A. | 1 percent |
B. | 5 percent |
C. | 10 percent |
D. | 20 percent |
E. | None of the above |
Answer» C. 10 percent |
304. | A micro hydel project has |
A. | low head availability |
B. | low power potential |
C. | low discharge |
D. | All of the above |
E. | None of the above |
Answer» D. All of the above |
305. | Which of the following needs to be filtered in a diesel engine? |
A. | Air and diesel oil only |
B. | Air only |
C. | Lubrecating oil only |
D. | Air, diesel oil and lubricating |
E. | Diesel oil only |
Answer» D. Air, diesel oil and lubricating |
306. | All of the following are hard coals EXCEPT |
A. | Authracite |
B. | Lignite |
C. | Bituminous |
D. | Semi-bituminous |
E. | None of the above |
Answer» B. Lignite |
307. | For transmission lines the standing wave ratio is the ratio of |
A. | maximum foltage to minimum voltage |
B. | maximum current to minimum voltage |
C. | peak voltage to rms voltage |
D. | maximum reactance to minimum reactance |
E. | None of the above |
Answer» A. maximum foltage to minimum voltage |
308. | Reflecting mirrors for solar energy are known as |
A. | diffusers |
B. | ponds |
C. | heliostats |
D. | mantle |
E. | None of the above |
Answer» C. heliostats |
309. | Litz wire, is used for intermediate frequencies to overcome |
A. | corona effect |
B. | skin effect |
C. | radio interference |
D. | All of the above |
E. | None of the above |
Answer» B. skin effect |
310. | The insulators for overhead lines are generally made of |
A. | Porcelain |
B. | Wood |
C. | Copper |
D. | Plastic |
E. | Aluminium |
Answer» A. Porcelain |
311. | Which type of conductors are used for transmitting bulk of power at high voltage? |
A. | ACSR |
B. | Copper |
C. | Cadmium copper |
D. | Galvanised steel |
E. | Any of the above |
Answer» A. ACSR |
312. | The major constituent of natural gas is |
A. | Hydrogen |
B. | Carbon monoxide |
C. | Ammonia |
D. | Methane |
E. | Acetylene |
Answer» D. Methane |
313. | Long distance electric trains take power on |
A. | 600 V dc |
B. | 25 kV single phase ac |
C. | 25 kV two phase ac |
D. | 1500 V dc |
E. | 25 kV three phase ac |
Answer» B. 25 kV single phase ac |
314. | Wind form of power generation are being established at |
A. | Kutch |
B. | Tuticorin |
C. | J & K |
D. | all above places |
E. | None of the above |
Answer» D. all above places |
315. | Which lamp is used for cinerma projectors |
A. | Carbon arc lamp |
B. | Nitrogen filled GLS lamp |
C. | Mercury vapour lamp |
D. | Sodium vapour lamp |
E. | Frosted GLS lamp |
Answer» A. Carbon arc lamp |
316. | A load curve is the relationship between load on power plant with the |
A. | average time |
B. | instantaneous time |
C. | time in chronological order |
D. | algebraic sum of times |
E. | None of the above |
Answer» C. time in chronological order |
317. | Heavy water is used in a nuclear power plant as a |
A. | Coolant |
B. | Reflector |
C. | Fuel |
D. | Shield |
E. | Moderator |
Answer» E. Moderator |
318. | The power factor of a three phase induction motor at no load will be |
A. | 0.5 to 0.6 leading |
B. | 0.5 to 0.6 lagging |
C. | 0.2 to 0.3 lagging |
D. | Zero |
E. | 0.2 to 0.3 leading |
Answer» C. 0.2 to 0.3 lagging |
319. | The power factor of a load of 100 kW is to be raised from 0.5 lagging to 0.9 lagging. The KVA rating of the capacitor will be |
A. | 12.5 |
B. | 212.5 |
C. | 25 |
D. | 125 |
E. | 75 |
Answer» D. 125 |
320. | One kilowatt hour is equal to |
A. | 86,000 calories |
B. | 8600 calories |
C. | 860,000 calories |
D. | 8600,000 calories |
E. | 86,000,000 calories |
Answer» C. 860,000 calories |
321. | 1 kilowatt hour is the same as |
A. | 1000 joules |
B. | 1000 watt-sec |
C. | 3600 watt-hours |
D. | 3600,000 watt-sec |
E. | 1 joule |
Answer» D. 3600,000 watt-sec |
322. | A 11 kV transmission line carries power to a distance of 30 kilometres. This will be termed as |
A. | Short transmission line |
B. | Medium transmission line |
C. | Long transmission line |
D. | Very long transmission line |
E. | None of the above |
Answer» A. Short transmission line |
323. | The dielectric strength of rubber is about |
A. | 3 kV/mm |
B. | 30 kV/m |
C. | 30 kV/cm |
D. | None of the above |
E. | All of the above |
Answer» B. 30 kV/m |
324. | ACSR conductor having 7 steel strands surrounded by 25 aluminium conductors will be specified as |
A. | 7?25 |
B. | 7?32 |
C. | 25?7 |
D. | 25?32 |
E. | None of the above |
Answer» C. 25?7 |
326. | The chances of corona are maximum during | |||
A. | summer heat | |||
B. | winter | |||
C. | dry water | |||
D. | humid weather | |||
E. | None of the above | |||
Answer» D. humid weather | ||||
327. | The expected life of a GLS lamp is nearly |
A. | 50 hours |
B. | 10,000 hours |
C. | 5000 hours |
D. | 1000 hours |
E. | 100 hours |
Answer» D. 1000 hours |
328. | Neglecting losses in a transmission system, if the voltage is doubled for the same power transmission, the weight of conductor material required will be |
A. | four times |
B. | double |
C. | half |
D. | one-fourth |
E. | None of the above |
Answer» D. one-fourth |
329. | Skin effects is proportional to |
A. | diameter of conductor |
B. | (diameter of conductor) |
C. | (diameter of conductor)2 |
D. | (diameter of conductor)3 |
E. | None of the above |
Answer» C. (diameter of conductor)2 |
330. | The thickness of the layer of insulation on a cable depends on |
A. | KVA |
B. | kW |
C. | Power factor |
D. | Voltage |
E. | Current carrying capacity of conductor |
Answer» D. Voltage |
331. | Strain type insulators are used where the conductors are |
A. | dead ended |
B. | at intermediate anchor towers |
C. | any of the above |
D. | None of the above |
E. | None of the above |
Answer» C. any of the above |
332. | Coal used in power plants is also known as |
A. | Charcoal |
B. | Coke |
C. | Power coal |
D. | Steam coal |
E. | Soft coal |
Answer» D. Steam coal |
333. | The highest point on the load curve represents |
A. | Maximum time |
B. | Maximum demand |
C. | Maximum concrete load |
D. | KVA rating of generators |
E. | None of the above |
Answer» B. Maximum demand |
334. | The voltage of a single solar cell is |
A. | 0.5 V |
B. | 1 V |
C. | 1.1 V |
D. | 2.1 V |
E. | None of the above |
Answer» A. 0.5 V |
335. | High horse power diesel engines are usually started by |
A. | Batteries |
B. | Compressed air |
C. | Cranking |
D. | Self-starter or cranking |
E. | Self-starter |
Answer» B. Compressed air |
336. | In case of humic coals, hydrogen percentage varies from |
A. | 4 to 6 percent |
B. | 10 to 15 percent |
C. | 16 to 20 percent |
D. | 20 to 30 percent |
E. | None of the above |
Answer» A. 4 to 6 percent |
337. | Which of the following motor can operate on lagging as well as leading power factor? |
A. | Synchronous motor |
B. | Universal motor |
C. | Reluctance motor |
D. | Squirrel cage induction motor |
E. | Capacitor run motor |
Answer» A. Synchronous motor |
338. | A 200 MW generator will invariably be |
A. | Hydrogen cooled |
B. | Nitrogen cooled |
C. | Air cooled |
D. | Oxygen cooled |
E. | Pressurised air cooled |
Answer» A. Hydrogen cooled |
339. | Presence of non-condensable gases in geopressured water causes |
A. | corrosion of parts |
B. | pollution |
C. | flow problems |
D. | All of the above |
E. | None of the above |
Answer» D. All of the above |
340. | Which of the following place is not associated with nuclear power plants? |
A. | Narora |
B. | Kamalappakam |
C. | Tarapur |
D. | Kora |
E. | Bangalore |
Answer» E. Bangalore |
341. | Pearlite is |
A. | a low ash containing coal |
B. | same as lignite |
C. | an insulation material |
D. | none of the above |
E. | None of the above |
Answer» C. an insulation material |
342. | The term ‘critical’ is associated with which type of power plant? |
A. | Gas turbine power plant |
B. | Steam power plant |
C. | Hydro-electric power plant |
D. | Diesel engine power plant |
E. | Nuclear power plant |
Answer» E. Nuclear power plant |
343. | Reverse capacity of a plants is given by |
A. | Maximum demand – Average demand |
B. | Plant capacity – Maximum demand |
C. | Plant capacity – Average demand |
D. | Plant capacity x (1 – Load factor) |
E. | None of the above |
Answer» B. Plant capacity – Maximum demand |
344. | The standard wattage of 4 feet fluorescent tube is |
A. | 500 W |
B. | 250 W |
C. | 10 W |
D. | 40 W |
E. | 100 W |
Answer» D. 40 W |
345. | Standed conductors are used for transmitting power at high voltages because of |
A. | increased tensile strength |
B. | low cost |
C. | case in handling |
D. | low wind resistance |
E. | None of the above |
Answer» C. case in handling |
346. | In a transmission line if booster transformer is to be used, the preferred location will be |
A. | at the receiving end |
B. | at the sending end |
C. | at the intermediate point |
D. | anywhere in the line |
E. | None of the above |
Answer» C. at the intermediate point |
347. | For the same wattage, which of the following lamp is cheapest? |
A. | Fluorescent tube 2 ft. |
B. | GLS lamp |
C. | Fluorescent tube 4 ft. |
D. | Mercury vapour lamp |
E. | Sodium vapour lamp |
Answer» B. GLS lamp |
348. | One British thermal unit (BTU) is nearly equal to |
A. | 252 joules |
B. | 2106 joules |
C. | 243 joules |
D. | 1053 joules |
E. | 504 joules |
Answer» D. 1053 joules |
349. | At which of a following speed the generators for 3 phase, 50 Hz supply will not run? |
A. | 1200 rpm |
B. | 500 rpm |
C. | 250 rpm |
D. | 166? rpm |
E. | 750 rpm |
Answer» A. 1200 rpm |
351. | Which type of insulators are used on 132 kV transmission lines? | ||
A. | Pin type | ||
B. | Disc type | ||
C. | Shackle type | ||
D. | Pin and shackle type | ||
E. | None of the above | ||
Answer» B. Disc type | |||
352. | Gamma rays are |
A. | high energy, short wavelength electromagnetic radiation |
B. | high energy, long wavelength electromagnetic wavelength |
C. | low energy, long wavelength electromagnetic radiation |
D. | low energy, short wavelength electromagnetic radiation |
E. | None of the above |
Answer» A. high energy, short wavelength electromagnetic radiation |
353. | Baume’s scale measures |
A. | purity of water |
B. | radioactivity |
C. | specific gravity of liquids |
D. | specific gravity of gases |
E. | None of the above |
Answer» C. specific gravity of liquids |
354. | The depreciation rate for an equipment is generally decided in light of |
A. | Sales tax rules |
B. | Excise duty rules |
C. | Income tax rules |
D. | Electricity duty rules |
E. | None of the above |
Answer» C. Income tax rules |
355. | Which of the following is an advantage of using static capacitors of power factor improvement? |
A. | Low losses within the capacitors |
B. | No rotating parts |
C. | Can be easily installed |
D. | Can work under normal atmospheric conditions |
E. | All of the above |
Answer» E. All of the above |
356. | Skin effects depends upon |
A. | size of the conductor |
B. | frequency of the current |
C. | resistivity of the conductor |
D. | All of the above |
E. | None of the above |
Answer» D. All of the above |
357. | If a diesel engine has a turbochanger, it can be concluded that the engine is |
A. | Pressure lubricated |
B. | Double acting type |
C. | Air cooled type |
D. | Supercharged type |
E. | High speed type |
Answer» D. Supercharged type |
358. | Which of the following factor affects corona? |
A. | Atmospheric conditions |
B. | Conductor size |
C. | Spacing between conductors |
D. | Line voltage |
E. | All of the above |
Answer» E. All of the above |
359. | The function of steel wire in a ACSR conductor is |
A. | to take care of voltage surges |
B. | to prevent corona |
C. | to reduce inductance and hence improve power factor |
D. | to provide additional mechanical strength |
E. | None of the above |
Answer» D. to provide additional mechanical strength |
360. | Which of the following method can be used for heating wood? |
A. | Oil burner heating |
B. | Carbon arc heating |
C. | Tungsten arc heating |
D. | Resistance heating |
E. | Dielectric heating |
Answer» E. Dielectric heating |
361. | Sag is provided in overhead transmission lines so that |
A. | Repairs can be done easily |
B. | Corona can be reduced |
C. | Skia effect can be reduced |
D. | Safe tension is not exceeded |
E. | None of the above |
Answer» D. Safe tension is not exceeded |
362. | A chimney is not a part of which of the following type of power plant? |
A. | Steam power plant |
B. | Diesel engine power plant |
C. | Gas turbine power plant |
D. | Hydro-electric power plant |
E. | All of the above |
Answer» D. Hydro-electric power plant |
363. | Fixed carbon in case of biogas is around |
A. | 12.5 percent |
B. | 25 percent |
C. | 40 percent |
D. | 68 percent |
E. | None of the above |
Answer» A. 12.5 percent |
364. | the main cause of power loss in a transmission line is |
A. | Resistance |
B. | capacitance is negligible |
C. | Inductance |
D. | Both inductance and capacitance |
E. | None of the above |
Answer» A. Resistance |
365. | In hydrothermal systems when steam water and dissolved solids are available as source of energy, the entrained solids are removed by |
A. | filters |
B. | centrifugal separators |
C. | strainers |
D. | None of the above |
E. | None of the above |
Answer» B. centrifugal separators |
366. | Steel poles used for telephone lines are generally |
A. | painted |
B. | plated |
C. | galvanized |
D. | blackened |
E. | None of the above |
Answer» C. galvanized |
367. | Raniganj is famous for |
A. | Thorium deposits |
B. | Oil fields |
C. | LPG |
D. | Coal |
E. | None of the above |
Answer» D. Coal |
368. | The chemical composition of coal is given by |
A. | Proximate analysis |
B. | Ultimate analysis |
C. | Orsat analysis |
D. | All of the above |
E. | None of the above |
Answer» B. Ultimate analysis |
369. | If 3 MW power is to be transmitted over a distance of 30 km, the desirable transmission voltage will be |
A. | 11 kV |
B. | 33 kV |
C. | 66 kV |
D. | 132 kV |
E. | None of the above |
Answer» B. 33 kV |
370. | The power factor of a 3 phase induction motor will be least |
A. | at no load |
B. | at 80% load |
C. | at 25% load |
D. | at full load |
E. | at 5% load |
Answer» A. at no load |
371. | A 132 kV transmission line carrying power through a distance of 250 kilometers will be termed as |
A. | Very short transmission line |
B. | Short transmission line |
C. | Long transmission line |
D. | Trunk line |
E. | None of the above |
Answer» C. Long transmission line |
372. | In a hydroelectric plant a conduit-system for taking water from the intake work to the turbine is known as |
A. | Penstock |
B. | Dam |
C. | Reservoir |
D. | Surge tank |
E. | Flume |
Answer» A. Penstock |
373. | Most power generating units are conservatively rated. For short durations, these units can be easily overloaded by about |
A. | 1 to 2 percent |
B. | 10 to 15 percent |
C. | 25 to 30 percent |
D. | 40 to 50 percent |
E. | None of the above |
Answer» B. 10 to 15 percent |
374. | Therm is a unit of |
A. | radioactivity |
B. | heating value |
C. | wind speed |
D. | tidal wave |
E. | None of the above |
Answer» B. heating value |
376. | soot is virtually nothing but | |||
A. | ash | |||
B. | cinder | |||
C. | gas | |||
D. | carbon | |||
E. | None of the above | |||
Answer» D. carbon | ||||
377. | Which of the following is not needed in megneto hydrodynamic power plants? |
A. | Chimney |
B. | Combustor |
C. | Steam turbine |
D. | Fuel |
E. | None of the above |
Answer» C. Steam turbine |
378. | A four stroke petrol engine is designed to develop 35 BHP at 200 RPM. It has an indicated mean effective pressure of 20 kg/cm2, a stroke of 35 cm and a bore diameter of 20 cm. Using this data mechanical efficiency of the engine at the running condition given would be closest to |
A. | 50 percent |
B. | 60 percent |
C. | 70 percent |
D. | 80 percent |
E. | None of the above |
Answer» C. 70 percent |
379. | Particles having the same atomic number but different mass unmbers are called |
A. | Beta particles |
B. | Positrons |
C. | Isotopes |
D. | Ions |
E. | Decayed particles |
Answer» C. Isotopes |
380. | Careful handling of fuel is essential for which of the following power plant? |
A. | Hydro-electric power plant |
B. | Diesel engine power plant |
C. | Gas turbine power plant |
D. | Steam power plant |
E. | Nuclear power plant |
Answer» E. Nuclear power plant |
381. | High load factor can be expected in |
A. | power plants near load centre |
B. | slow speed power plants |
C. | multi-unit power plants |
D. | base load stations |
E. | None of the above |
Answer» D. base load stations |
382. | Flash generally results from |
A. | gas turbines |
B. | diesel engines |
C. | pulverized coal boilers |
D. | fluidized bed boilers |
E. | None of the above |
Answer» C. pulverized coal boilers |
383. | A load curve helps in deciding |
A. | size of the generating units |
B. | total installed capacity of the plant |
C. | operating schedule of the generating units |
D. | All of the above |
E. | None of the above |
Answer» D. All of the above |
384. | In any transmission line |
A. | ?BC = 1 – AD |
B. | AC – BD = -1 |
C. | AB = CD + 1 |
D. | AC = BD + 1 |
E. | AB – CD = -1 |
Answer» A. ?BC = 1 – AD |
385. | The device used to generate power utilising energy of wind is called |
A. | Air motor |
B. | Aerogenerator |
C. | Windmill |
D. | Wind generagor |
E. | None of the above |
Answer» C. Windmill |
386. | Pea coal is |
A. | anthracite coal, small in size |
B. | same as peat |
C. | low ash content lignite |
D. | none of the above |
E. | None of the above |
Answer» A. anthracite coal, small in size |
387. | Air curtains find applications in |
A. | air conditioned spaces |
B. | green houses |
C. | nuclear power plants |
D. | solar energy system |
E. | None of the above |
Answer» A. air conditioned spaces |
388. | A current of 10 milli-amperes through human body |
A. | will cause mild sensation |
B. | will affect muscle control |
C. | will affect breathing |
D. | will cause death |
E. | None of the above |
Answer» A. will cause mild sensation |
389. | A curve showing the variation of load on a power station with respect to time is known as |
A. | Flow chart |
B. | Performance curve |
C. | Load curve |
D. | Diversity factor |
E. | Load duration curve |
Answer» C. Load curve |
390. | Nagarjunsagar dam has been constructed on river |
A. | Kali |
B. | Krishna |
C. | Kaveri |
D. | Charnbal |
E. | Mahanadi |
Answer» B. Krishna |
391. | The location of which power plant is mainly decided by the geographical factors? |
A. | Diesel engine power plant |
B. | Hydro-electric power plant |
C. | Steam power plant |
D. | Nuclear power plant |
E. | Gas turbine power plant |
Answer» B. Hydro-electric power plant |
392. | In petrothermal systems of geothermal energy there is hot dry rock but no underground water. In such systems energy is obtained by |
A. | circulating compressed air |
B. | pumping water |
C. | creating water wells |
D. | None of the above |
E. | None of the above |
Answer» B. pumping water |
393. | A fast breeder reactor |
A. | operates with fast neutrons and produces less fissionable material than it consumes |
B. | operates with fast neutrons and produces more fissionable material than it consumes |
C. | operates with slow neutrons and produces less fissionable material than it consumes |
D. | operates with slow neutrons and produces more fissionable material than it consumes |
E. | None of the above |
Answer» B. operates with fast neutrons and produces more fissionable material than it consumes |
394. | The current down by the transmission line due to corona losses is |
A. | sinusoidal |
B. | square |
C. | non-sinusoidal |
E. | None of the above |
Answer» C. non-sinusoidal |
395. | In a transmission line following are the distributed parameters |
A. | resistance and inductance only |
B. | resistance, inductance and capacitance |
C. | resistance, inductance, capacitance and short conductance |
E. | None of the above |
Answer» C. resistance, inductance, capacitance and short conductance |
396. | The effect of ice deposition on conductor is |
A. | increased skin effect |
B. | reduced corona losses |
C. | increased weight |
D. | reduced sag |
E. | None of the above |
Answer» C. increased weight |
397. | Illumination due to moonlight is nearly |
A. | 18 lumens/meter2 |
B. | 300 lumens/meter2 |
C. | 0.3 lumen/meter2 |
D. | 1.8 lumens/meter2 |
E. | 30 lumens/meter2 |
Answer» C. 0.3 lumen/meter2 |
398. | Which of the following place is not associated with hydro-electric power plants? |
A. | Bhakra |
B. | Farakka |
C. | Koyana |
D. | Singrauli |
E. | Nagarjunsagar |
Answer» D. Singrauli |
399. | The speed of the primemover is controlled by |
A. | cam shaft |
B. | feed pump |
C. | regulator |
D. | governor |
E. | None of the above |
Answer» D. governor |
401. | Solar cells are made of | |||
A. | Sulphur | |||
B. | Silica | |||
C. | Antimony | |||
D. | Steel | |||
E. | Phosphorous | |||
Answer» B. Silica | ||||
402. | A tidal power plant is being installed in India near |
A. | Goa |
B. | Gulf of Cambay |
C. | Bay of Bengal |
D. | Cochin |
E. | Vishakhapatnam |
Answer» B. Gulf of Cambay |
403. | In case the height of transmission towers is increased |
A. | the line capacitance and inductance will not change |
B. | the line capacitance will increase but line inductance will increase |
C. | the line capacitance will decrease and line inductance will increase |
D. | the line capacitance will decrease but line inductance will remain unaltered |
E. | None of the above |
Answer» D. the line capacitance will decrease but line inductance will remain unaltered |
404. | Parr’s classification of coal is based on |
A. | proximate analysis |
B. | ultimate analysis |
C. | orsat analysis |
D. | none of above |
E. | None of the above |
Answer» A. proximate analysis |
405. | Water is fed to the boiler at |
A. | At 100 kg/cm2 |
B. | At pressure more than the steam pressure |
C. | Less than atmospheric pressure |
D. | Atmospheric pressure |
E. | Slightly more than atmospheric pressure |
Answer» B. At pressure more than the steam pressure |
406. | Which of the following location is not associated with super-thermal power plant? |
A. | Korba |
B. | Badarpur |
C. | Farakka |
D. | Rehand |
E. | None of the above |
Answer» B. Badarpur |
407. | Phase, advancers for power factor improvement are generally used for |
A. | Induction motors below 200 HP |
B. | Induction motors below 10 HP |
C. | Induction motors below 100 HP |
D. | Are lamps of high wattage |
E. | Transformers of 100 MVA and above |
Answer» A. Induction motors below 200 HP |
408. | The pressure of steam used in modern thermal power plants is upto |
A. | 100 kg/cm2 |
B. | 15 kg/cm2 |
C. | 250 kg/cm2 |
D. | 350 kg/cm2 |
E. | 170 kg/cm2 |
Answer» E. 170 kg/cm2 |
409. | In transmission system a feeder feeds power to |
A. | service mains |
B. | generating stations |
C. | distributors |
D. | All of the above |
E. | None of the above |
Answer» C. distributors |
410. | The average pH of the normal rainfall is usually |
A. | neutral |
B. | slightly acidic |
C. | slightly alkaline |
E. | None of the above |
Answer» B. slightly acidic |
411. | Sodium sulphur batteries use electrolyte consisting of |
A. | solid aluminium oxide |
B. | dilute sulphuric acid |
C. | brine |
D. | KOH |
E. | None of the above |
Answer» B. dilute sulphuric acid |
412. | Corona generally results in |
A. | Violet glow |
B. | Hissing noise |
C. | Production of ozone gas |
D. | All of the above |
E. | None of the above |
Answer» D. All of the above |
413. | Natural gas is obtained |
A. | as by-product from blast furnace |
B. | as by-product from petroleum refining |
C. | from earth’s surface usually along with crude |
D. | from ammonia |
E. | None of the above |
Answer» C. from earth’s surface usually along with crude |
414. | Which of the following cannot be the prime-mover for a generator of 120 MW capacity? |
A. | Steam turbine |
B. | Gas turbine |
C. | Kaplan turbine |
D. | Diesel engine |
E. | None of the above |
Answer» D. Diesel engine |
415. | Which of the following will need highest level of illumination? |
A. | Railway platforms |
B. | Foyer for cinema halls |
C. | Bed rooms |
D. | Hospital wards |
E. | Proof reading |
Answer» E. Proof reading |
416. | Quad is a mesure of |
A. | photosynthesis |
B. | wind power |
C. | radioactive decay |
D. | energy |
E. | None of the above |
Answer» D. energy |
417. | A Buchholz relay is used on |
A. | Transformer |
B. | Generators |
C. | Transmission lines |
D. | Cables |
E. | All of the above |
Answer» A. Transformer |
418. | The supply and distribution of electrical energy in states is controlled by |
A. | NTPC |
B. | Electricity Board |
C. | BHEL |
D. | Department of Industries |
E. | Department of Science and Technology |
Answer» B. Electricity Board |
419. | Pyrhelicometer measures |
A. | intensity of direct solar radiation |
B. | wind speed at an elevation |
C. | fission caused by thermal reutrons |
D. | total electromagnetic radiation cmitted by the sun |
E. | None of the above |
Answer» A. intensity of direct solar radiation |
420. | In any transmission line, the dimensions of constants B and C are |
A. | ohm and ohm |
B. | ohm and mho |
C. | mho and ohm |
D. | mho and mho |
E. | None of the above |
Answer» B. ohm and mho |
421. | By increasing sag in the suspended transmission line |
A. | Tension in the line decreases |
B. | Tension in the line increases |
C. | Current carrying capacity of conductor increases |
D. | Current carrying capacity of conductor decreases |
E. | None of the above |
Answer» A. Tension in the line decreases |
422. | As compared to copper, the conductivity of aluminium is nearly |
A. | 85% |
B. | 60% |
C. | 40% |
D. | 80% |
E. | 20% |
Answer» B. 60% |
423. | The equipment used for pulverising is known as |
A. | Stoker |
B. | Ball mill |
C. | Burner |
D. | Coke oven |
E. | Hopper |
Answer» B. Ball mill |
424. | The dimensions of generalised constants A and D are |
A. | ohms and mhos |
B. | mhos and ohms |
C. | mhos and mhos |
D. | Both are dimensionless |
E. | ohms and ohms |
Answer» D. Both are dimensionless |
426. | In high voltage transmission lines the top most conductor is | ||
A. | R-phase conductor | ||
B. | Y-phase conductor | ||
C. | B-phase conductor | ||
D. | Earth conductor | ||
E. | None of the above | ||
Answer» D. Earth conductor | |||
427. | A sodium graphite reactor uses |
A. | sodium as moderator and graphite as coolant |
B. | sodium as coolant and graphite as moderator |
C. | a mixture of sodium and graphite as coolant |
D. | a mixture of sodium and graphite as moderator |
E. | None of the above |
Answer» B. sodium as coolant and graphite as moderator |
428. | The material used for insulation on the cable is |
A. | Impregnated paper |
B. | Varnished cambric |
C. | Rubber mineral compound |
D. | Any of the above |
E. | None of the above |
Answer» D. Any of the above |
429. | Ekman spiral is an idealized mathematical description of |
A. | ocean temperature gradient |
B. | wind distribution in the planetary boundary layer |
C. | carbon dioxide percentage variation with elevation |
D. | radioactive decay of materials |
E. | None of the above |
Answer» B. wind distribution in the planetary boundary layer |
430. | In order to reduce skin effect at UHF |
A. | conductors are painted |
B. | conductors are anodised |
C. | copper tubes with silver plating are used |
D. | copper rods with silver plating are used |
E. | None of the above |
Answer» C. copper tubes with silver plating are used |
431. | Certain metals become super-conducting when cooled below |
A. | melting point |
B. | transition temperature |
C. | 0?K |
D. | 0?C |
E. | None of the above |
Answer» B. transition temperature |
432. | Which of the following material has high scrap value as compared to initial cost? |
A. | Copper |
B. | Aluminium |
C. | Steel |
D. | Cast iron |
E. | Wood |
Answer» A. Copper |
433. | Which plant has least pollution problem? |
A. | Steam power plant |
B. | Nuclear power plant |
C. | Gas turbine power plant |
D. | Hydro-electric power plant |
E. | Diesel engine power plant |
Answer» D. Hydro-electric power plant |
434. | In which power plant chimney is not needed? |
A. | Gas turbine power plant |
B. | Steam power plant |
C. | Hydro-electric power plant |
D. | All of the above |
E. | None of the above |
Answer» C. Hydro-electric power plant |
435. | Attemperation is |
A. | the process of reducing pollution through stack gases |
B. | the process of energy conservation by the use of economiser, etc. |
C. | preheating of water before admission to boiler |
D. | the reduction of steam temperature |
E. | None of the above |
Answer» D. the reduction of steam temperature |
436. | In ACSR conductors |
A. | varnish is the insulation used |
B. | bitumen is the insulation between aluminium and steel |
C. | no insulation is used between aluminium and steel |
D. | air acts as insulation medium between aluminium and steel |
E. | None of the above |
Answer» C. no insulation is used between aluminium and steel |
437. | The standard frequency of electric power supply in India is |
A. | 440 Hz |
B. | 50 Hz |
C. | 1 Hz |
D. | 60 Hz |
E. | 220 Hz |
Answer» B. 50 Hz |
438. | HBJ pipeline orginates from |
A. | Gujarat and ends in Bihar |
B. | Maharashtra and ends in Uttar Pradesh |
C. | Maharashtra and ends in Bihar |
D. | Gujarat and ends in Uttar Pradesh |
E. | None of the above |
Answer» D. Gujarat and ends in Uttar Pradesh |
439. | Which authority is directly concerned with generation and distribution of electricity? |
A. | Electricity Authority of India |
B. | Department of Science and Technology |
C. | Ministry of Power |
D. | State Electricity Boards |
E. | None of the above |
Answer» D. State Electricity Boards |
440. | An air preheater is an essential part of which of the following power plant? |
A. | Hydro-electric power plant |
B. | Nuclear power plant |
C. | Gas turbine power plant |
D. | Steam power plant |
E. | Diesel engine power plant |
Answer» D. Steam power plant |
441. | The compressor used in gas turbine is usually |
A. | Lobe type compressor |
B. | Multistage axial flow compressor |
C. | Multistage reciprocating compressor |
D. | Single stage reciprocating compressor |
E. | Screw compressor |
Answer» B. Multistage axial flow compressor |
442. | Hot template curves are the plot of |
A. | conductor sags and span lengths |
B. | temperature and ground clearance |
C. | temperature and humidity |
D. | conductor weight and sag |
E. | None of the above |
Answer» A. conductor sags and span lengths |
443. | In a steam locomotive the power is generated in |
A. | Double acting non-condensing steam engine |
B. | Single acting condensing steam engine |
C. | Single acting non-condensing steam engine |
D. | Double acting condensing steam engine |
E. | Steam turbine |
Answer» A. Double acting non-condensing steam engine |
444. | Which of the following domestic utility item consumes least power? |
A. | Electric iron |
B. | Toaster |
C. | Electric shaver |
D. | Desert cooler |
E. | Heat convector |
Answer» C. Electric shaver |
445. | Tidal energy source mainly makes use of |
A. | kinetic energy of water |
B. | potential energy of water |
C. | both kinetic as well as potential energy of water |
D. | None of the above |
E. | None of the above |
Answer» B. potential energy of water |
446. | The carbon percentage in diesel oil is nearly |
A. | 52% |
B. | 74% |
C. | 66% |
D. | 86% |
E. | 100% |
Answer» D. 86% |
447. | Gas turbines are widely used in |
A. | Power generation |
B. | Pumping stations |
C. | Aircraft |
D. | Ship |
E. | Locomotive |
Answer» C. Aircraft |
448. | The alternators for a steam power plant usually run at |
A. | 1200 rpm |
B. | 3000 rpm |
C. | 1500 rpm |
D. | 750 rpm |
E. | 30,000 rpm |
Answer» B. 3000 rpm |
449. | When a conductor is suspended between two supports at the same level it taken the shape of |
A. | Cycloid |
B. | Epicycloid |
C. | Parabola |
D. | Semi-circle |
E. | Catenary |
Answer» E. Catenary |
451. | Which of the following public sector unit is engaged in the manufacture of thermal power plants? | |||
A. | National Thermal Power Corporation Ltd | |||
B. | Department of science and technology | |||
C. | Bharat Heavy Electricals Ltd | |||
D. | Heavy Engineering Corporation Ltd | |||
E. | Coal India Ltd | |||
Answer» C. Bharat Heavy Electricals Ltd | ||||
452. | In a long transmission line, the effect of |
A. | resistance, capacitance and inductance is neglected |
B. | resistance and inductance is taken into account but effect of capacitance is neglected |
C. | capacitance and inductance is taken into account but effect of resistance is neglected |
D. | resistance, capacitance and inductance is taken into account |
E. | resistance and capacitance is taken into account but effect of inductance is neglected |
Answer» D. resistance, capacitance and inductance is taken into account |
453. | Which of the following power plant will give least running cost of the production of electrical power? |
A. | All will have nearly same running cost |
B. | Nuclear power plant |
C. | Gas turbine power plant |
D. | Diesel engine power plant |
E. | Steam power plant |
Answer» B. Nuclear power plant |
454. | In a steam turbine cycle the lowest pressure occurs in |
A. | Super-heater exit |
B. | Boiler |
C. | Condenser |
D. | Super-heater |
E. | Turbine inlet |
Answer» C. Condenser |
455. | If K be the volume of conductor for two wire dc system, then for the same voltage the volume of conductor for 3 wire dc system for supplying the same load will be |
A. | 2 K |
B. | 5 K |
C. | 1.25 K |
D. | 0.25 K |
E. | 0.3125 K |
Answer» E. 0.3125 K |
456. | One BTU is the amount of energy required to raise the temperature of |
A. | One gram of water through 1?C |
B. | One pound of water through 1?C |
C. | One gram of water through 1?F |
D. | One pound of water through 1?F |
E. | One kilogram of water through ?F |
Answer» D. One pound of water through 1?F |
457. | Which of the following material has the best conductivity? |
A. | ACSR |
B. | 5.71 |
C. | Cadmium copper |
D. | Copper |
E. | Aluminium |
Answer» D. Copper |
458. | The voltage of a 2 wire de system is raised from 200 V to 400 V. For the same power transmitted over the same distance and for the same power loss, the saving in conductor copper will be |
A. | 25% |
B. | 40% |
C. | 50% |
D. | 60% |
E. | 75% |
Answer» E. 75% |
459. | The capacity of generators being installed in super-thermal power plant is |
A. | 200 MW |
B. | 400 MW |
C. | 100 MW |
D. | 500 MW |
E. | 220 MW |
Answer» D. 500 MW |
460. | Which of the following power plant can be installed within the shortest possible time? |
A. | Steam power plant |
B. | Diesel engine power plant |
C. | Hydro-electric power plant |
D. | Gas turbine power plant |
E. | Nuclear power plant |
Answer» B. Diesel engine power plant |
461. | Which of the following is not the standard rating of GLS lamps in India? |
A. | 50 W |
B. | 60 W |
C. | 40 W |
D. | 100 W |
E. | 25 W |
Answer» A. 50 W |
462. | Which of the following place is associated with thermal power plants? |
A. | Agra |
B. | Tarapur |
C. | Bhakra |
D. | Obra |
E. | DVC |
Answer» D. Obra |
463. | In a medium transmission line the effect of |
A. | resistance and inductance is negligible but effect of capacitance is taken into account |
B. | capacitance is negligible |
C. | resistance, capacitance and inductance is taken into account |
D. | resistance is negligible |
E. | inductance is negligible |
Answer» C. resistance, capacitance and inductance is taken into account |
464. | The calorific value of natural gas is expected to be around |
A. | 2000 kcal/m3 |
B. | 1500 kcal/m3 |
C. | 25000 kcal/m3 |
D. | 500 kcal/m3 |
E. | 2500 kcal/m3 |
Answer» D. 500 kcal/m3 |
465. | The name DVC is associated with which type of power generation? |
A. | Nuclear |
B. | Hydro-electric |
C. | Thermal |
D. | Gas turbine |
E. | Diesel engine |
Answer» B. Hydro-electric |
466. | Which of the following gas is sometimes filled in filament lamps? |
A. | Argon |
B. | Ozone |
C. | Helium |
D. | Hydrogen |
E. | Oxygen |
Answer» A. Argon |
467. | The heating value of coal largely depends on |
A. | Volatile matter |
B. | Carbon content |
C. | Size of coal particles |
D. | Moisture content |
E. | Sulphur content |
Answer» B. Carbon content |
468. | Pulverised coal is |
A. | Coal free from as content |
B. | Coal which burns for long time |
C. | Coal free from sulphur |
D. | Coal broken into fine pieces |
E. | Non-smoking coal |
Answer» D. Coal broken into fine pieces |
469. | The calorific value of diesel oil is expected to be around |
A. | 1000 kcal/kg |
B. | 16000 kcal/kg |
C. | 21000 kcal/kg |
D. | 11000 kcal/kg |
E. | 5000 kcal/kg |
Answer» D. 11000 kcal/kg |
470. | The highest voltage at which the power is transmitted in India is |
A. | 400 kV |
B. | 66 kV |
C. | 33 kV |
D. | 220 kV |
E. | 132 kV |
Answer» A. 400 kV |
471. | In any transmission line, which two generalised constants are equal? |
A. | C and D |
B. | B and C |
C. | A and B |
D. | A and C |
E. | A and D |
Answer» E. A and D |
472. | The power factor of a 3 phase induction motor near full load is expected to be around |
A. | 0.8 lagging |
B. | 0.8 leading |
C. | 0.5 lagging |
D. | 0.5 leading |
E. | 0.1 lagging |
Answer» A. 0.8 lagging |
473. | If an engine has spark plugs, it can be safely concluded that it is |
A. | a four stroke engine |
B. | a air cooled engine |
C. | a water cooled engine |
D. | a two stroke engine |
E. | not a diesel engine |
Answer» E. not a diesel engine |
474. | The work of installation and commissioning of power plants in India is generally undertaken by |
A. | NTPC Ltd. |
B. | Coal Authority of India |
C. | Steel Authority of India |
D. | NHPC Ltd |
E. | HAL |
Answer» A. NTPC Ltd. |
476. | The specific gravity of copper is | ||
A. | 8.9 | ||
B. | 5.9 | ||
C. | 13.9 | ||
D. | 16.9 | ||
E. | 2.9 | ||
Answer» B. 5.9 | |||
477. | A pin type insulator is generally used upto |
A. | 11 kV |
B. | 132 kV |
C. | 66 kV |
D. | 33 kV |
E. | 1.1 kV |
Answer» D. 33 kV |
478. | A 66 kV transmission line carrying power to a distance of 120 kilometre will be termed as |
A. | Very short transmission line |
B. | Long transmission line |
C. | Medium transmission line |
D. | Tiny transmission line |
E. | Short transmission line |
Answer» C. Medium transmission line |
479. | Maximum horse power of a steam locomotive is |
A. | 2500 |
B. | 100 |
C. | 1500 |
D. | 5000 |
E. | 500 |
Answer» C. 1500 |
480. | Pressure cables are used for |
A. | Low power factors |
B. | Higher voltages |
C. | High kW |
D. | High KVA |
E. | High current ratings |
Answer» B. Higher voltages |
481. | Diesel engine fuels are rated by |
A. | Cetane number |
B. | HUCR |
C. | Octane number |
D. | CFR number |
E. | Calorific value |
Answer» A. Cetane number |
482. | The wavelength of green colour is nearly |
A. | 4000 A |
B. | 5500 A |
C. | 2500 A |
D. | 7500 A |
E. | 1000 A |
Answer» B. 5500 A |
483. | The average load factor of thermal power plants in India is |
A. | 35 to 40% |
B. | 50 to 60% |
C. | 80 to 95% |
D. | 100% |
E. | 20 to 30% |
Answer» B. 50 to 60% |
484. | A ship is powered by |
A. | Diesel turbine |
B. | Steam turbines, diesel engines, hydraulic turbines or nuclear reactors |
C. | Steam turbines, diesel engines hydraulic turbines |
D. | Steam turbine |
E. | Steam turbines or diesel engines |
Answer» E. Steam turbines or diesel engines |
485. | A gas turbine works on |
A. | Brayton cycle |
B. | Regenerative cycle |
C. | Carnot cycle |
D. | Rankine cycle |
E. | Dual cycle |
Answer» A. Brayton cycle |
486. | The live storage of coal in power plant means |
A. | Coal ready for combustion |
B. | Preheated coal |
C. | Coal in transit |
D. | Purified coal |
E. | Storage of coal sufficient to meet hour demand for the plant. |
Answer» E. Storage of coal sufficient to meet hour demand for the plant. |
487. | The maximum number of generators in a power plant must be |
A. | One |
B. | Even |
C. | Two |
D. | Odd |
E. | Three |
Answer» C. Two |
488. | The area under the load curve represents |
A. | Average demand |
B. | Maximum demand |
C. | System voltage |
D. | Energy consumed |
E. | Current |
Answer» D. Energy consumed |
489. | Out of the following which one is not a unconventional source of energy? |
A. | Geothermal energy |
B. | Tidal power |
C. | Wind power |
D. | Nuclear energy |
E. | Magneto hydrodynamic generator |
Answer» D. Nuclear energy |
490. | In which of the following state manufacturing unit of M/S Bharat Heavy Electricals Ltd. Is not located? |
A. | Rajasthan |
B. | Andhra Pardesh |
C. | U.P. |
D. | Karnataka |
E. | M.P. |
Answer» A. Rajasthan |
491. | The value of an equipment at the end of its useful life is known as |
A. | Scrap value |
B. | Obsolescence value |
C. | Demand value |
D. | Useful value |
E. | Replacement value |
Answer» A. Scrap value |
492. | Which of the following will need the lower level of illumination? |
A. | Hospital wards |
B. | Display |
C. | Railway platform |
D. | Auditoriums |
E. | Green rooms |
Answer» C. Railway platform |
493. | The calorific value of coal gas is expected to be around |
A. | 500 kcal/m3 |
B. | 1500 kcal/m3 |
C. | 2500 kcal/m3 |
D. | 7500 kcal/m3 |
E. | 5000 kcal/m3 |
Answer» D. 7500 kcal/m3 |
494. | A jet aircraft is powered by |
A. | Gas turbine |
B. | Solar cells |
C. | Batteries |
D. | Petrol engines |
E. | Diesel engines |
Answer» A. Gas turbine |
495. | One calorie is the same as |
A. | 4.18 joules |
B. | 1 dyne-sec |
C. | 1 watt |
D. | 1 dyne |
E. | 4.11 watts |
Answer» A. 4.18 joules |
496. | Death is almost certain when the current through human body is |
A. | 100 milli-amperes |
B. | 100 micro-amperes |
C. | 10 micro-amperes |
D. | 10 milli-amperes |
E. | 25 micro-amperes |
Answer» A. 100 milli-amperes |
497. | Standby losses are least in case of |
A. | Steam power plant |
B. | Nuclear power plant |
C. | Diesel engine power plant |
D. | Hydro-electric power plant |
E. | Gas turbine power plant |
Answer» D. Hydro-electric power plant |
498. | Approximately how many kg of air are required for the combustion of one kg of diesel oil? |
A. | 5 kg |
B. | 35 kg |
C. | 25 kg |
D. | 15 kg |
E. | 1 kg |
Answer» D. 15 kg |
499. | Which of the following variety of coal will have highest ash content |
A. | Bengal coal |
B. | Bituminous coal |
C. | Grade I steam coal |
D. | Lignite |
E. | Coking coal |
Answer» D. Lignite |
501. | A 3 phase 15 kW induction motor has a p.f. of 0.75 lagging. A bank of capacitor is connected in delta across the supply terminals and p.f. raised to 0.9 lagging. The KVAR rating of the capacitors connected in each phase will be nearly | ||
A. | 1 | ||
B. | 250 | ||
C. | 4 | ||
D. | 2 | ||
E. | 20 | ||
Answer» D. 2 | |||
502. | First aid for an electric shock victim is |
A. | Artificial respiration |
B. | Rubbing the skin |
C. | Pouring water on body |
D. | Bandage |
E. | Massage |
Answer» A. Artificial respiration |
503. | A turbocharger is a part of |
A. | Gas turbine power plant |
B. | Thermal power plant |
C. | Diesel engine power plant |
D. | Hydro-electric power plant |
E. | Nuclear power plant |
Answer» C. Diesel engine power plant |
504. | Steam pressure of super-thermal power plant is |
A. | 100 kg/cm2 |
B. | 50 kg/cm2 |
C. | 200 kg/cm2 |
D. | 15 kg/cm2 |
E. | 170 kg/cm2 |
Answer» E. 170 kg/cm2 |
505. | Which of the following enters the super heater of a boiler? |
A. | Wet steam |
B. | Cold water |
C. | Dry steam |
D. | Hot water |
E. | Superheated steam |
Answer» C. Dry steam |
506. | The cost of fuel is least in case of |
A. | Nuclear power plant |
B. | Diesel engine power plant |
C. | Gas turbine power plants |
D. | Steam power plant |
E. | Hydro-electric power plant |
Answer» E. Hydro-electric power plant |
507. | Due to burning of one kg of pure carbon with a minimum quantity of air required, the percentage of carbondioxide in the exhaust gases would be |
A. | 10% |
B. | 100% |
C. | 58% |
D. | 11.50% |
E. | 29% |
Answer» E. 29% |
508. | The useful life of static capacitor can be expected to be |
A. | 2 to 3 months |
B. | 8 to 10 years |
C. | 1 to 2 years |
D. | 6 to 8 months |
E. | 50 to 100 years |
Answer» B. 8 to 10 years |
509. | One kilowatt hour is nearly equal to |
A. | 3.4 B.T.U. |
B. | 34 B.T.U. |
C. | 34000 B.T.U. |
D. | 3400 B.T.U. |
E. | 340 B.T.U. |
Answer» D. 3400 B.T.U. |
510. | The critical pressure water is |
A. | Less than 200 kg/cm2 |
B. | 100 kg/cm2 |
C. | More than 200 kg/cm2 |
D. | 1 atm |
E. | 150 kg/cm2 |
Answer» C. More than 200 kg/cm2 |
511. | A single unit of 50 MW is generally not available with which type of power plant? |
A. | Nuclear power plant |
B. | Diesel engine power plant |
C. | Steam power plant |
D. | Hydro-electric power plant |
E. | Gas turbine power plant |
Answer» B. Diesel engine power plant |
512. | Most of the generators in thermal power plants run at |
A. | 1500 rpm |
B. | 3000 rpm |
C. | 15000 rpm |
D. | 750 rpm |
E. | 1000 rpm |
Answer» B. 3000 rpm |
513. | Which of the following state in India is relatively rich in coal deposits? |
A. | Rajasthan |
B. | Andhra Pradesh |
C. | Kerala |
D. | Bihar |
E. | U.P. |
Answer» D. Bihar |
514. | Least overall efficiency can be expected in which type of power plant? |
A. | Gas turbine power plant |
B. | Diesel engine power plant |
C. | Nuclear power plant |
D. | Steam power plant |
E. | Hydro-electric power plant |
Answer» D. Steam power plant |
515. | Which of the following engine has the highest air-fuel ratio? |
A. | Diesel engine |
B. | Petrol engine |
C. | Gas engine |
D. | Gas turbine |
E. | All above has got nearly same air fuel ratio |
Answer» D. Gas turbine |
516. | Visible spectrum of light has wavelength in the range |
A. | 10 to 40 A |
B. | 4000 to 7000 A |
C. | 14,000 to 17,000 A |
D. | 100 to 400 A |
E. | 40,000 to 70,000 A |
Answer» B. 4000 to 7000 A |
517. | Which of the following equipment has power factor closer to unity |
A. | Carbon arc lamp |
B. | Single phase capacitor motor |
C. | Fluorescent lamp |
D. | Induction motor |
E. | GLS lamp |
Answer» E. GLS lamp |
518. | Which of the following power plant has the highest cost per kW installed? |
A. | Nuclear power plant |
B. | Hydro-electric power |
C. | Diesel engine power plant |
D. | Steam power plant |
E. | Gas turbine power plant |
Answer» A. Nuclear power plant |
519. | Power factor is expected to be highest in case of |
A. | Tube lights |
B. | Carbon arc lamp |
C. | Sodium lamps |
D. | Mercury vapour lamp |
E. | GLS lamp |
Answer» E. GLS lamp |
520. | The major share of power in India is provided by which of the following type of power plant? |
A. | Gas turbine power plants |
B. | Nuclear power plant |
C. | Diesel engine power plant |
D. | Steam power plant |
E. | Hydro-electric power plant |
Answer» D. Steam power plant |
521. | A generating station is to supply four regions of loads with peak demands of 10 MW, 15 MW, 20 MW and 30 MW. If the diversity factor is 1.5 the maximum demand on the station is |
A. | 45 MW |
B. | 30 MW |
C. | 50 MW |
D. | 60 MW |
E. | 70 MW |
Answer» C. 50 MW |
522. | The permissible pH value of water of boilers is |
A. | 1 |
B. | Less than 14 |
C. | 7 |
D. | 5 |
E. | Slightly more than 7 |
Answer» E. Slightly more than 7 |
523. | For extinguishing electrical fires |
A. | Carbondioxide fire extinguisher should be used |
B. | Carbon tetrachloride fire extinguisher should be used |
C. | Rubber pieces should be thrown |
D. | Conductors should be erthed |
E. | Water should be sprinkled |
Answer» B. Carbon tetrachloride fire extinguisher should be used |
524. | In pumped storage plant |
A. | Water is recirculated through turbines |
B. | Downstream water is pumped upstream during off-load periods |
C. | Pressure accumulators are used |
D. | Power is produced by pumps |
E. | Water is stored by pumping to high pressures |
Answer» B. Downstream water is pumped upstream during off-load periods |
526. | In a diesel engine, the consumption of diesel oil per BHP per hour is nearly | ||
A. | 1250 grams | ||
B. | 10 grams | ||
C. | 100 grams | ||
D. | 850 grams | ||
E. | 200 grams | ||
Answer» E. 200 grams | |||
527. | The formula for Cetane is |
A. | C10H24 |
B. | C6H15 |
C. | C12H32 |
D. | C16H34 |
E. | C10H12 |
Answer» D. C16H34 |
528. | The vacuum inside a incandescent lamp is of the order of |
A. | 10-3 mm Hg |
B. | 10-2 mm Hg |
C. | 10-4 mm Hg |
D. | 10-5 mm Hg |
E. | 10-6 mm Hg |
Answer» C. 10-4 mm Hg |
529. | When pulverised fuel is not used the equipment used for feeding coal to the boiler is |
A. | Burner |
B. | Stoker |
C. | Heater |
D. | Regenerator |
E. | Feed pump |
Answer» B. Stoker |
530. | The specific gravity of aluminium is |
A. | 1.71 |
B. | 4.71 |
C. | 2.71 |
D. | 5.71 |
E. | 3.71 |
Answer» C. 2.71 |
531. | The illumination level in the houses is usually in the range |
A. | 2500 to 3000 lumens/m2 |
B. | 10 to 20 lumens/m2 |
C. | 1200 to 1600 lumens/m2 |
D. | 100 to 1400 lumens/m2 |
E. | 400 to 650 lumens/m2 |
Answer» D. 100 to 1400 lumens/m2 |
532. | For under water movement of a submarine the power is provided by |
A. | Batteries |
B. | Thermoionic converters |
C. | Solar energy |
D. | Geothermal energy |
E. | Tidal energy |
Answer» A. Batteries |
533. | Which of the following is considered to be superior quality coal for power plants? |
A. | Lignite |
B. | Coke |
C. | Pulverised coal |
D. | Peat |
E. | Bituminous coal |
Answer» E. Bituminous coal |
534. | The string efficiency in an ac system is |
A. | 100% |
B. | 70.70% |
C. | Zero |
D. | 50% |
E. | 25% |
Answer» A. 100% |
535. | For low head and high discharge the hydraulic turbine preferred is |
A. | Jonval turbine |
B. | Kaplan turbine |
C. | Fourneyron turbine |
D. | Pelton wheel |
E. | Francis turbine |
Answer» B. Kaplan turbine |
536. | The initial cost of an equipment is Rs. 20 lakhs and depreciated cost after ten years is Rs. 15 lakhs. The useful life of the equipment is |
A. | 15 years |
B. | 5 years |
C. | Cannot be determined on the basis of the information provided |
D. | 10 years |
E. | 20 years |
Answer» C. Cannot be determined on the basis of the information provided |
537. | Which of the following domestic utility item consumes maximum power? |
A. | Exhaust fan |
B. | Ceiling fan |
C. | Refrigerator |
D. | Cooking range |
E. | Mixer grinder |
Answer» D. Cooking range |
538. | Satellites are powered by |
A. | Batteries |
B. | Solar cells |
C. | Thermo-electric generators |
D. | Thermoionic converters |
E. | Photo electric cells |
Answer» B. Solar cells |
539. | The calorific value of lignite is expected to be around |
A. | 1000 kcal/kg |
B. | 2500 kcal/kg |
C. | 5000 kcal/kg |
D. | 10,000 kcal/kg |
E. | 1500 kcal/kg |
Answer» C. 5000 kcal/kg |
540. | Diesel locomotives in India are manufactured at |
A. | Ajmer |
B. | Varanasi |
C. | Chitranjan |
D. | Parambur |
E. | Bangalore |
Answer» B. Varanasi |
541. | Which of the following needs to be filtered in a diesel engine? |
A. | Diesel oil only |
B. | Lubrecating oil only |
C. | Air only |
D. | Air, diesel oil and lubricating |
E. | Air and diesel oil only |
Answer» D. Air, diesel oil and lubricating |
542. | The insulators for overhead lines are generally made of |
A. | Wood |
B. | Aluminium |
C. | Plastic |
D. | Copper |
E. | Porcelain |
Answer» E. Porcelain |
543. | The major constituent of natural gas is |
A. | Hydrogen |
B. | Methane |
C. | Acetylene |
D. | Carbon monoxide |
E. | Ammonia |
Answer» B. Methane |
544. | Long distance electric trains take power on |
A. | 25 kV three phase ac |
B. | 1500 V dc |
C. | 600 V dc |
D. | 25 kV single phase ac |
E. | 25 kV two phase ac |
Answer» D. 25 kV single phase ac |
545. | Which lamp is used for cinerma projectors |
A. | Carbon arc lamp |
B. | Frosted GLS lamp |
C. | Mercury vapour lamp |
D. | Sodium vapour lamp |
E. | Nitrogen filled GLS lamp |
Answer» A. Carbon arc lamp |
546. | Heavy water is used in a nuclear power plant as a |
A. | Fuel |
B. | Reflector |
C. | Moderator |
D. | Shield |
E. | Coolant |
Answer» C. Moderator |
547. | The power factor of a three phase induction motor at no load will be |
A. | 0.5 to 0.6 leading |
B. | 0.2 to 0.3 lagging |
C. | Zero |
D. | 0.2 to 0.3 leading |
E. | 0.5 to 0.6 lagging |
Answer» B. 0.2 to 0.3 lagging |
548. | The power factor of a load of 100 kW is to be raised from 0.5 lagging to 0.9 lagging. The KVA rating of the capacitor will be |
A. | 125 |
B. | 212.5 |
C. | 25 |
D. | 12.5 |
E. | 75 |
Answer» A. 125 |
549. | One kilowatt hour is equal to |
A. | 8600,000 calories |
B. | 86,000,000 calories |
C. | 860,000 calories |
D. | 86,000 calories |
E. | 8600 calories |
Answer» C. 860,000 calories |
551. | The expected life of a GLS lamp is nearly | |||
A. | 50 hours | |||
B. | 10,000 hours | |||
C. | 100 hours | |||
D. | 1000 hours | |||
E. | 5000 hours | |||
Answer» D. 1000 hours | ||||
552. | The thickness of the layer of insulation on a cable depends on |
A. | kW |
B. | KVA |
C. | Voltage |
D. | Current carrying capacity of conductor |
E. | Power factor |
Answer» C. Voltage |
553. | Coal used in power plants is also known as |
A. | Charcoal |
B. | Soft coal |
C. | Coke |
D. | Steam coal |
E. | Power coal |
Answer» D. Steam coal |
554. | High horse power diesel engines are usually started by |
A. | Batteries |
B. | Compressed air |
C. | Self-starter or cranking |
D. | Cranking |
E. | Self-starter |
Answer» B. Compressed air |
555. | Which of the following motor can operate on lagging as well as leading power factor? |
A. | Squirrel cage induction motor |
B. | Universal motor |
C. | Capacitor run motor |
D. | Synchronous motor |
E. | Reluctance motor |
Answer» D. Synchronous motor |
556. | A 200 MW generator will invariably be |
A. | Nitrogen cooled |
B. | Hydrogen cooled |
C. | Pressurised air cooled |
D. | Oxygen cooled |
E. | Air cooled |
Answer» B. Hydrogen cooled |
557. | Which of the following place is not associated with nuclear power plants? |
A. | Tarapur |
B. | Bangalore |
C. | Kamalappakam |
D. | Narora |
E. | Kora |
Answer» B. Bangalore |
558. | The term ‘critical’ is associated with which type of power plant? |
A. | Hydro-electric power plant |
B. | Nuclear power plant |
C. | Steam power plant |
D. | Gas turbine power plant |
E. | Diesel engine power plant |
Answer» B. Nuclear power plant |
559. | The standard wattage of 4 feet fluorescent tube is |
A. | 10 W |
B. | 100 W |
C. | 250 W |
D. | 500 W |
E. | 40 W |
Answer» E. 40 W |
560. | For the same wattage, which of the following lamp is cheapest? |
A. | Mercury vapour lamp |
B. | Fluorescent tube 4 ft. |
C. | Fluorescent tube 2 ft. |
D. | GLS lamp |
E. | Sodium vapour lamp |
Answer» D. GLS lamp |
561. | One British thermal unit (BTU) is nearly equal to |
A. | 1053 joules |
B. | 243 joules |
C. | 2106 joules |
D. | 252 joules |
E. | 504 joules |
Answer» A. 1053 joules |
562. | At which of a following speed the generators for 3 phase, 50 Hz supply will not run? |
A. | 166? rpm |
B. | 250 rpm |
C. | 750 rpm |
D. | 1200 rpm |
E. | 500 rpm |
Answer» D. 1200 rpm |
563. | The specific gravity of diesel oil is closer to |
A. | 1.35 |
B. | 0.84 |
C. | 1 |
D. | 0.35 |
E. | 2.7 |
Answer» B. 0.84 |
564. | If a diesel engine has a turbochanger, it can be concluded that the engine is |
A. | Supercharged type |
B. | Air cooled type |
C. | Double acting type |
D. | Pressure lubricated |
E. | High speed type |
Answer» A. Supercharged type |
565. | Which of the following method can be used for heating wood? |
A. | Oil burner heating |
B. | Tungsten arc heating |
C. | Resistance heating |
D. | Dielectric heating |
E. | Carbon arc heating |
Answer» D. Dielectric heating |
566. | In a hydroelectric plant a conduit-system for taking water from the intake work to the turbine is known as |
A. | Reservoir |
B. | Flume |
C. | Dam |
D. | Surge tank |
E. | Penstock |
Answer» E. Penstock |
567. | Particles having the same atomic number but different mass unmbers are called |
A. | Ions |
B. | Positrons |
C. | Isotopes |
D. | Decayed particles |
E. | Beta particles |
Answer» C. Isotopes |
568. | Careful handling of fuel is essential for which of the following power plant? |
A. | Gas turbine power plant |
B. | Steam power plant |
C. | Diesel engine power plant |
D. | Nuclear power plant |
E. | Hydro-electric power plant |
Answer» D. Nuclear power plant |
569. | In any transmission line |
A. | AC – BD = -1 |
B. | AC = BD + 1 |
C. | AB – CD = -1 |
D. | AB = CD + 1 |
E. | ?BC = 1 – AD |
Answer» E. ?BC = 1 – AD |
570. | A curve showing the variation of load on a power station with respect to time is known as |
A. | Load curve |
B. | Flow chart |
C. | Performance curve |
D. | Load duration curve |
E. | Diversity factor |
Answer» A. Load curve |
571. | Nagarjunsagar dam has been constructed on river |
A. | Charnbal |
B. | Krishna |
C. | Kali |
D. | Mahanadi |
E. | Kaveri |
Answer» B. Krishna |
572. | The location of which power plant is mainly decided by the geographical factors? |
A. | Diesel engine power plant |
B. | Nuclear power plant |
C. | Gas turbine power plant |
D. | Hydro-electric power plant |
E. | Steam power plant |
Answer» D. Hydro-electric power plant |
573. | Illumination due to moonlight is nearly |
A. | 1.8 lumens/meter2 |
B. | 0.3 lumen/meter2 |
C. | 18 lumens/meter2 |
D. | 300 lumens/meter2 |
E. | 30 lumens/meter2 |
Answer» B. 0.3 lumen/meter2 |
574. | Which of the following place is not associated with hydro-electric power plants? |
A. | Farakka |
B. | Singrauli |
C. | Koyana |
D. | Bhakra |
E. | Nagarjunsagar |
Answer» B. Singrauli |
576. | Solar cells are made of | |||
A. | Antimony | |||
B. | Phosphorous | |||
C. | Silica | |||
D. | Sulphur | |||
E. | Steel | |||
Answer» C. Silica | ||||
577. | A tidal power plant is being installed in India near |
A. | Bay of Bengal |
B. | Vishakhapatnam |
C. | Gulf of Cambay |
D. | Goa |
E. | Cochin |
Answer» C. Gulf of Cambay |
578. | Water is fed to the boiler at |
A. | Atmospheric pressure |
B. | At 100 kg/cm2 |
C. | Less than atmospheric pressure |
D. | Slightly more than atmospheric pressure |
E. | At pressure more than the steam pressure |
Answer» E. At pressure more than the steam pressure |
579. | Phase, advancers for power factor improvement are generally used for |
A. | Induction motors below 200 HP |
B. | Are lamps of high wattage |
C. | Transformers of 100 MVA and above |
D. | Induction motors below 10 HP |
E. | Induction motors below 100 HP |
Answer» A. Induction motors below 200 HP |
580. | The pressure of steam used in modern thermal power plants is upto |
A. | 100 kg/cm2 |
B. | 250 kg/cm2 |
C. | 350 kg/cm2 |
D. | 170 kg/cm2 |
E. | 15 kg/cm2 |
Answer» D. 170 kg/cm2 |
581. | The supply and distribution of electrical energy in states is controlled by |
A. | Department of Science and Technology |
B. | NTPC |
C. | Electricity Board |
D. | Department of Industries |
E. | BHEL |
Answer» C. Electricity Board |
582. | As compared to copper, the conductivity of aluminium is nearly |
A. | 60% |
B. | 40% |
C. | 80% |
D. | 20% |
E. | 85% |
Answer» A. 60% |
583. | The equipment used for pulverising is known as |
A. | Ball mill |
B. | Hopper |
C. | Coke oven |
D. | Stoker |
E. | Burner |
Answer» A. Ball mill |
584. | The dimensions of generalised constants A and D are |
A. | ohms and ohms |
B. | mhos and ohms |
C. | mhos and mhos |
D. | ohms and mhos |
E. | Both are dimensionless |
Answer» E. Both are dimensionless |
585. | Which of the following material has high scrap value as compared to initial cost? |
A. | Cast iron |
B. | Copper |
C. | Aluminium |
D. | Steel |
E. | Wood |
Answer» B. Copper |
586. | Which plant has least pollution problem? |
A. | Nuclear power plant |
B. | Hydro-electric power plant |
C. | Steam power plant |
D. | Diesel engine power plant |
E. | Gas turbine power plant |
Answer» B. Hydro-electric power plant |
587. | The standard frequency of electric power supply in India is |
A. | 1 Hz |
B. | 50 Hz |
C. | 220 Hz |
D. | 440 Hz |
E. | 60 Hz |
Answer» B. 50 Hz |
588. | An air preheater is an essential part of which of the following power plant? |
A. | Steam power plant |
B. | Hydro-electric power plant |
C. | Gas turbine power plant |
D. | Diesel engine power plant |
E. | Nuclear power plant |
Answer» A. Steam power plant |
589. | The compressor used in gas turbine is usually |
A. | Lobe type compressor |
B. | Multistage axial flow compressor |
C. | Screw compressor |
D. | Multistage reciprocating compressor |
E. | Single stage reciprocating compressor |
Answer» B. Multistage axial flow compressor |
590. | In a steam locomotive the power is generated in |
A. | Steam turbine |
B. | Single acting condensing steam engine |
C. | Double acting condensing steam engine |
D. | Double acting non-condensing steam engine |
E. | Single acting non-condensing steam engine |
Answer» D. Double acting non-condensing steam engine |
591. | Which of the following domestic utility item consumes least power? |
A. | Heat convector |
B. | Electric shaver |
C. | Electric iron |
D. | Desert cooler |
E. | Toaster |
Answer» B. Electric shaver |
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