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Which of the following is not an advantage of hydroelectric power plant?
c Explanation: Output of such plants is never constant. This is because of their dependency over flow rate of water in river which is seasonal. No fuel requirement low running cost and no standby losses are advantages of hydroelectric power plants.
c
See lessExplanation: Output of such plants is never constant. This is because of their
dependency over flow rate of water in river which is seasonal. No fuel requirement low
running cost and no standby losses are advantages of hydroelectric power plants.
Trash racks are built for ___________
b Explanation: Heavy solid materials flowing with water can damage the turbine blades if not stopped. Trash racks are closely spaced flat bars which provides narrow path from which such unwanted materials cannot pass.
b
See lessExplanation: Heavy solid materials flowing with water can damage the turbine blades if
not stopped. Trash racks are closely spaced flat bars which provides narrow path from
which such unwanted materials cannot pass.
Which element of hydroelectric power plant prevents the penstock from water hammer phenomenon?
d Explanation: Sudden increase in water pressure in penstock due to closing of gates is called water hammer. Surge tank is a tank at sufficient height , connected to penstock through riser pipe. It takes the rejected water and relives the penstock from excessive water hammer pressure
d
See lessExplanation: Sudden increase in water pressure in penstock due to closing of gates is
called water hammer. Surge tank is a tank at sufficient height , connected to penstock
through riser pipe. It takes the rejected water and relives the penstock from excessive
water hammer pressure
Which of the following is not an advantage of hydroelectric power plant?
c Explanation: Output of such plants is never constant. This is because of their dependency over flow rate of water in river which is seasonal. No fuel requirement low running cost and no standby losses are advantages of hydroelectric power plants.
c
See lessExplanation: Output of such plants is never constant. This is because of their
dependency over flow rate of water in river which is seasonal. No fuel requirement low
running cost and no standby losses are advantages of hydroelectric power plants.
Hydroelectric power plant is mainly located in ____________
c Explanation: In order to get sufficient head, hydroelectric power plants are constructed in hilly areas. In desert and flat areas sufficient water head cannot be obtained. Deltas are not suitable for this because of high sedimentation
c
See lessExplanation: In order to get sufficient head, hydroelectric power plants are constructed in
hilly areas. In desert and flat areas sufficient water head cannot be obtained. Deltas are
not suitable for this because of high sedimentation
The amount of electrical energy that can be generated by a hydroelectric power plant depends upon ___________
b Explanation: Potential energy of large quantity of stored water is used by hydroelectric power plant to generate electrical energy. Head of water is important to get kinetic energy from that potential energy. Efficiency of alternator represents that what percentage of input mechanical power it canRead more
b
See lessExplanation: Potential energy of large quantity of stored water is used by hydroelectric
power plant to generate electrical energy. Head of water is important to get kinetic
energy from that potential energy. Efficiency of alternator represents that what
percentage of input mechanical power it can convert into electrical power.
Which of the following is the correct equation for the electrical power generated by the hydroelectric power plant?
c Explanation: Rating of any power plant is expressed by its maximum output power. These are large quantities so rating is given in mega watts.The electrical power generated by this plant is proportional to specific weight of water(w), water head(H), generation efficiency(η), flow rate of water(Q) aRead more
c
See lessExplanation: Rating of any power plant is expressed by its maximum output power.
These are large quantities so rating is given in mega watts.The electrical power
generated by this plant is proportional to specific weight of water(w), water head(H),
generation efficiency(η), flow rate of water(Q) and acceleration due to gravity.
What of the below mentioned statements are incorrect as compared to the HVDC system?
d Explanation: Out of all the corona losses are less in HVDC system.
d
See lessExplanation: Out of all the corona losses are less in HVDC system.
Which of the following is like equivalent circuit of short transmission line?
b Explanation: Due to smaller distance and lower line voltage, the shunt capacitance effects are extremely small and also the shunt conductance effects are very low. So both of them are neglected and equivalent circuit contains only series inductance(L) and resistance(R).
b
See lessExplanation: Due to smaller distance and lower line voltage, the shunt capacitance
effects are extremely small and also the shunt conductance effects are very low. So both
of them are neglected and equivalent circuit contains only series inductance(L) and
resistance(R).
Which of the following is not a method for solution of medium transmission line?
b Explanation: Actual method used for solution of medium transmission lines are end condenser method, nominal-T method and nominal π method.
b
See lessExplanation: Actual method used for solution of medium transmission lines are end
condenser method, nominal-T method and nominal π method.