Thermal Power Plant multiple choice questions
Thermal Power Plant
1. In reaction turbine,function of the draft tube is
a) To increase the flow rate
b) To reduce water hammer effect
c) To convert kinetic energy of water to potential energyby a gradual expansion in divergen part
d) None of the above
Answer: To reduce water hammer effect
2. A steam power station requires space
a) Equal to diesel power station
b) More than diesel power station
c) More than diesel power station
d) None of the above
Answer: More than diesel power station
3. ____________ requires more space
a) Nuclear power plant
b) Hydro-electric power plant
c) Tharmal power plant
d) Diesel power plant
Answer: Tharmal power plant
4. The major heat loss in a steam power station occurs in
a) Economiser
b) Spillways
c) Condenser
d) None of the above
Answer: Condenser
5. The height of chimney in a staem power plant is governed by
a) Flue gases quantity
b) The draught to be produced
c) Control of pollution
d) Corner of power plant
Answer: The draught to be produced
6. The draught produced by the chimney if due to the ____ difference between the column of hot gases inside the chimney and the cold air outside.
a) Temperature
b) Potential
c) Density
d) None of the above
Answer: Density
7. Which of the following station is least efficient
a) Nuclear power plant
b) Diesel power station
c) Thermal power station
d) None of the above
Answer: Thermal power station
8. Francis turbine is usually used for
a) High head
b) Low head
c) Mediam head
d) All of the above
Answer: Mediam head
9. The major heat loss in a staem power station occurs in
a) Heat chember
b) Penstock
c) Spillways
d) Condenser
Answer: Condenser
10. Standby loss is maximum in
a) Nuclear power plant
b) Hydro-electric power plant
c) Tharmal power plant
d) Diesel power plant
Answer: Tharmal power plant
11. Pelton turbine is suitable for high head and ________
a) High discharge
b) Low discharge
c) High and low discharge
d) None of the above
Answer: Low discharge
12. Pelton wheel turbine is used for minimum of the following heads
a) 20 m
b) 40 m
c) 120 m
d) 180 m and above
Answer: 180m and above
13. The path of flue gases in Thermal power plant is
a) Boiler – Economizer – Superheater– Air preheater
b) Boiler – Superheater – Air preheater – Economizer
c) Boiler – Air preheater – Superheater – Economizer
d) Boiler – Superheater – Economizer – Air preheater
Answer: Boiler – Superheater – Economizer – Air preheater
14. The following is the correct order of energy conversion in thermal power plants
a) Chemical energy – Mechanical energy – Electrical energy
b) Mechanical energy – Chemical energy – Electrical energy
c) Wind energy – Mechanical energy – Electrical energy
d) Heat energy – Electrical energy – Mechanical energy
Answer: Chemical energy – Mechanical energy – Electrical energy
15. In thermal power plant, turbine is placed
a) before boiler
b) in between boiler and generator
c) after generator
d) any of the above
Answer: in between boiler and generator
16. With the increase in _____ the efficiency obeys the ‘law of diminishing returns’
a) Pressure
b) Temperature
c) Volume
d) All of the above
Answer: Pressure
17. In thermal power plants, the dust of flue gases is trapped by
a) Precipitator
b) Economizer
c) Superheater
d) Air preheater
Answer: Precipitator
18. With the increase in _____ the efficiency obeys the ‘straight line law’
a) Pressure
b) Temperature
c) Volume
d) All of the above
Answer: Temperature
19. The following is not a component of Thermal power plant
a) Condenser
b) Cooling tower
c) Turbine
d) Fuel tank
Answer: Fuel tank
20. Fluid fuels are handled by
a) burners
b) stokers
c) both (a) and (b)
d) None of the above
Answer: both (a) and (b)
21. In the steam condensing power plants
a) The amount of energy extracted per kg of steam is increased
b) the steam, converted into water, can be re-circulated with the help of pump
c) Both (a) and (b)
d) None of the above
Answer: Both (a) and (b)
22. The most common method(s) used for burning of coal is (are)
a) Stroker firing
b) Pulverized fuel firing
c) both (a) and (b)
d) None of the above
Answer: both (a) and (b)
23. A Fluidised bed may be defined as the bed of ______ particles
a) Liquid
b) Solid
c) both (a) and (b)
d) None of the above
Answer: Solid
24. For steam boilers, the fuel(s) is (are) mainly
a) Bituminous coal
b) Fuel oil
c) Natural gas
d) All of the above
Answer: All of the above
25. The following is not a pulverized fuel burner.
a) Tangential burner
b) Turbulent burner
c) Cyclone burner
d) Radial burner
Answer: Radial burner
26. A ‘stroker’ is a power operated fuel ___ mechanism
a) Burning
b) Feeding
c) Handling
d) Storage
Answer: Feeding
27. In which of the following type of burner, liquid fuel is raised by capillary action?
a) Wick burners
b) Re-circulating burner
c) Rotating cup burner
d) All of the above
Answer: Wick burners
28. The spreader stroker, secondary air is supplied
a) through holes
b) through nozzles
c) from bottom side
d) any of the above
Answer: through nozzles
29. The following is (are) ash handling system(s)
a) Hydraulic system
b) Pneumatic system
c) Steam jet system
d) All of the above
Answer: All of the above
30. The major constituent of fly ash is
a) Silicon dioxide
b) Aluminium oxide
c) Calcium oxide
d) Magnesium oxide
Answer: Silicon dioxide
31. The following is dry type dust collectors
a) Spray type
b) Packed type
c) Impingement type
d) cyclone separator
Answer: cyclone separator
32. Rankine cycle efficiency in a good steam power station may be in the range between.
a) 15% - 20%
b) 35% - 40%
c) 50% - 60%
d) 90% - 95%
Answer: 35% - 40%
33. The thermal efficiency of a steam power station is
a) 38%
b) 28%
c) 40%
d) 45%
Answer: 28%
34. The cost of fuel transportation is maxmimun in
a) Hydro-electric power plant
b) Steam power plant
c) Nuclear power plant
d) 90% - 95%
Answer: Steam power plant
35. Francis,kaplan and propeller turbines fall under the category of
a) Impulse turbine
b) Reaction turbine
c) Impulse reaction combined
d) Axial flow
Answer: Reaction turbine
a) To increase the flow rate
b) To reduce water hammer effect
c) To convert kinetic energy of water to potential energyby a gradual expansion in divergen part
d) None of the above
Answer: To reduce water hammer effect
2. A steam power station requires space
a) Equal to diesel power station
b) More than diesel power station
c) More than diesel power station
d) None of the above
Answer: More than diesel power station
3. ____________ requires more space
a) Nuclear power plant
b) Hydro-electric power plant
c) Tharmal power plant
d) Diesel power plant
Answer: Tharmal power plant
4. The major heat loss in a steam power station occurs in
a) Economiser
b) Spillways
c) Condenser
d) None of the above
Answer: Condenser
5. The height of chimney in a staem power plant is governed by
a) Flue gases quantity
b) The draught to be produced
c) Control of pollution
d) Corner of power plant
Answer: The draught to be produced
6. The draught produced by the chimney if due to the ____ difference between the column of hot gases inside the chimney and the cold air outside.
a) Temperature
b) Potential
c) Density
d) None of the above
Answer: Density
7. Which of the following station is least efficient
a) Nuclear power plant
b) Diesel power station
c) Thermal power station
d) None of the above
Answer: Thermal power station
8. Francis turbine is usually used for
a) High head
b) Low head
c) Mediam head
d) All of the above
Answer: Mediam head
9. The major heat loss in a staem power station occurs in
a) Heat chember
b) Penstock
c) Spillways
d) Condenser
Answer: Condenser
10. Standby loss is maximum in
a) Nuclear power plant
b) Hydro-electric power plant
c) Tharmal power plant
d) Diesel power plant
Answer: Tharmal power plant
11. Pelton turbine is suitable for high head and ________
a) High discharge
b) Low discharge
c) High and low discharge
d) None of the above
Answer: Low discharge
12. Pelton wheel turbine is used for minimum of the following heads
a) 20 m
b) 40 m
c) 120 m
d) 180 m and above
Answer: 180m and above
13. The path of flue gases in Thermal power plant is
a) Boiler – Economizer – Superheater– Air preheater
b) Boiler – Superheater – Air preheater – Economizer
c) Boiler – Air preheater – Superheater – Economizer
d) Boiler – Superheater – Economizer – Air preheater
Answer: Boiler – Superheater – Economizer – Air preheater
14. The following is the correct order of energy conversion in thermal power plants
a) Chemical energy – Mechanical energy – Electrical energy
b) Mechanical energy – Chemical energy – Electrical energy
c) Wind energy – Mechanical energy – Electrical energy
d) Heat energy – Electrical energy – Mechanical energy
Answer: Chemical energy – Mechanical energy – Electrical energy
15. In thermal power plant, turbine is placed
a) before boiler
b) in between boiler and generator
c) after generator
d) any of the above
Answer: in between boiler and generator
16. With the increase in _____ the efficiency obeys the ‘law of diminishing returns’
a) Pressure
b) Temperature
c) Volume
d) All of the above
Answer: Pressure
17. In thermal power plants, the dust of flue gases is trapped by
a) Precipitator
b) Economizer
c) Superheater
d) Air preheater
Answer: Precipitator
18. With the increase in _____ the efficiency obeys the ‘straight line law’
a) Pressure
b) Temperature
c) Volume
d) All of the above
Answer: Temperature
19. The following is not a component of Thermal power plant
a) Condenser
b) Cooling tower
c) Turbine
d) Fuel tank
Answer: Fuel tank
20. Fluid fuels are handled by
a) burners
b) stokers
c) both (a) and (b)
d) None of the above
Answer: both (a) and (b)
21. In the steam condensing power plants
a) The amount of energy extracted per kg of steam is increased
b) the steam, converted into water, can be re-circulated with the help of pump
c) Both (a) and (b)
d) None of the above
Answer: Both (a) and (b)
22. The most common method(s) used for burning of coal is (are)
a) Stroker firing
b) Pulverized fuel firing
c) both (a) and (b)
d) None of the above
Answer: both (a) and (b)
23. A Fluidised bed may be defined as the bed of ______ particles
a) Liquid
b) Solid
c) both (a) and (b)
d) None of the above
Answer: Solid
24. For steam boilers, the fuel(s) is (are) mainly
a) Bituminous coal
b) Fuel oil
c) Natural gas
d) All of the above
Answer: All of the above
25. The following is not a pulverized fuel burner.
a) Tangential burner
b) Turbulent burner
c) Cyclone burner
d) Radial burner
Answer: Radial burner
26. A ‘stroker’ is a power operated fuel ___ mechanism
a) Burning
b) Feeding
c) Handling
d) Storage
Answer: Feeding
27. In which of the following type of burner, liquid fuel is raised by capillary action?
a) Wick burners
b) Re-circulating burner
c) Rotating cup burner
d) All of the above
Answer: Wick burners
28. The spreader stroker, secondary air is supplied
a) through holes
b) through nozzles
c) from bottom side
d) any of the above
Answer: through nozzles
29. The following is (are) ash handling system(s)
a) Hydraulic system
b) Pneumatic system
c) Steam jet system
d) All of the above
Answer: All of the above
30. The major constituent of fly ash is
a) Silicon dioxide
b) Aluminium oxide
c) Calcium oxide
d) Magnesium oxide
Answer: Silicon dioxide
31. The following is dry type dust collectors
a) Spray type
b) Packed type
c) Impingement type
d) cyclone separator
Answer: cyclone separator
32. Rankine cycle efficiency in a good steam power station may be in the range between.
a) 15% - 20%
b) 35% - 40%
c) 50% - 60%
d) 90% - 95%
Answer: 35% - 40%
33. The thermal efficiency of a steam power station is
a) 38%
b) 28%
c) 40%
d) 45%
Answer: 28%
34. The cost of fuel transportation is maxmimun in
a) Hydro-electric power plant
b) Steam power plant
c) Nuclear power plant
d) 90% - 95%
Answer: Steam power plant
35. Francis,kaplan and propeller turbines fall under the category of
a) Impulse turbine
b) Reaction turbine
c) Impulse reaction combined
d) Axial flow
Answer: Reaction turbine
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