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What is the main requirement of good coal burner?
b Explanation: Main requirement of good coal burner is complete combustion with production of uniform flame. Minimum operating and maintenance cost, simplicity in operation, attainment of proper design all are requirements of complete combustion.
b
See lessExplanation: Main requirement of good coal burner is complete combustion with
production of uniform flame. Minimum operating and maintenance cost, simplicity in
operation, attainment of proper design all are requirements of complete combustion.
In case of underfeed stokers fuel is supplied in the furnace _________
a Explanation: Mechanical stokers are of two types namely underfeed stokers and overfeed stokers. The two differ in manner of feeding of coal below or above the level at which primary air is admitted in the furnace. In case of underfeed stokers fuel is supplied into the furnace below the point of aiRead more
a
See lessExplanation: Mechanical stokers are of two types namely underfeed stokers and
overfeed stokers. The two differ in manner of feeding of coal below or above the level at
which primary air is admitted in the furnace. In case of underfeed stokers fuel is supplied
into the furnace below the point of air admission
Which of the following is not an advantage of stoker firing?
a Explanation: Stokers are the mechanical arrangement which is used to feed coals into the furnace. Due to the mechanical equipment combustion capacity increases with uniform feeding of coal of into furnace, also labour cost is reduced. Stoker firing requires installation of mechanical stoker hence,Read more
a
See lessExplanation: Stokers are the mechanical arrangement which is used to feed coals into
the furnace. Due to the mechanical equipment combustion capacity increases with
uniform feeding of coal of into furnace, also labour cost is reduced. Stoker firing requires
installation of mechanical stoker hence, capital investment requires.
What is the main drawback of liquid fuel in thermal power plant?
d Explanation: Handling and storing cost of oil fuels are less, load fluctuations can be made easily and few operations are needed. There is no disposal of ash. Superheaters are subjected to hard and adhesive oil slag which is often difficult to remove, but other heating surfaces are almost troubleRead more
d
See lessExplanation: Handling and storing cost of oil fuels are less, load fluctuations can be
made easily and few operations are needed. There is no disposal of ash. Superheaters
are subjected to hard and adhesive oil slag which is often difficult to remove, but other
heating surfaces are almost trouble free
Which of the following coal has highest moisture content?
d Explanation: Peat is the first stage in the process of transformation of buried vegetation into coal. It has about 60% to 90% moisture content and low carbon content (about 5% to 20%). Peat coal is not suitable for use in power plants
d
See lessExplanation: Peat is the first stage in the process of transformation of buried vegetation
into coal. It has about 60% to 90% moisture content and low carbon content (about 5%
to 20%). Peat coal is not suitable for use in power plants
The turbine in which steam enters the blade tip nearest the axis of the wheel and flows towards the circumference is called _____________
b Explanation: According to type of flow of steam the steam turbines used are of two types namely axial flow turbine and radial flow turbine. In axial flow turbine steam flows over the blades in a direction parallel to the axis of wheel. In radial flow turbine steam enters from blade tip near the axRead more
b
See lessExplanation: According to type of flow of steam the steam turbines used are of two types
namely axial flow turbine and radial flow turbine. In axial flow turbine steam flows over
the blades in a direction parallel to the axis of wheel. In radial flow turbine steam enters
from blade tip near the axis of wheel and flows towards the circumference.
.In condensing turbine what is the back pressure of the turbine?
d Explanation: According to the back pressure steam turbines are classified into condensing and non condensing turbines. Where there is no use of exhaust steam, turbine is built as a pure condensing type turbine. In condensing turbine steam is reduced in pressure down to a vacuum pressure which is iRead more
d
See lessExplanation: According to the back pressure steam turbines are classified into
condensing and non condensing turbines. Where there is no use of exhaust steam,
turbine is built as a pure condensing type turbine. In condensing turbine steam is
reduced in pressure down to a vacuum pressure which is in accordance with the cooling
water temperature
In condensing turbine what is the back pressure of the turbine?
d Explanation: According to the back pressure steam turbines are classified into condensing and non condensing turbines. Where there is no use of exhaust steam, turbine is built as a pure condensing type turbine. In condensing turbine steam is reduced in pressure down to a vacuum pressure which is iRead more
d
See lessExplanation: According to the back pressure steam turbines are classified into
condensing and non condensing turbines. Where there is no use of exhaust steam,
turbine is built as a pure condensing type turbine. In condensing turbine steam is
reduced in pressure down to a vacuum pressure which is in accordance with the cooling
water temperature
Which of the following is correct arrangement of different types of coals according to their increasing carbon content?
b Explanation: Coal is the most commonly used fuel in thermal power plant. Coal contain moisture, carbon, hydrogen, sulphur, Nitrogen, Oxygen and ash. Coals are classified according to their calorific value and carbon content.
b
See lessExplanation: Coal is the most commonly used fuel in thermal power plant. Coal contain
moisture, carbon, hydrogen, sulphur, Nitrogen, Oxygen and ash. Coals are classified
according to their calorific value and carbon content.
The turbine in which steam enters the blade tip nearest the axis of the wheel and flows towards the circumference is called _________
b Explanation: According to type of flow of steam the steam turbines used are of two types namely axial flow turbine and radial flow turbine. In axial flow turbine steam flows over the blades in a direction parallel to the axis of wheel. In radial flow turbine steam enters from blade tip near the axRead more
b
See lessExplanation: According to type of flow of steam the steam turbines used are of two types
namely axial flow turbine and radial flow turbine. In axial flow turbine steam flows over
the blades in a direction parallel to the axis of wheel. In radial flow turbine steam enters
from blade tip near the axis of wheel and flows towards the circumference.