Here are 1000 MCQs on Power Plant Engineering (Chapterwise).
1. What is a power plant?
a) industrial facility that uses primary energy to generate electricity
b) industrial facility that uses secondary energy to generate mechanical energy
c) industrial facility that uses primary energy to generate mechanical energy
d) industrial facility that uses secondary energy to generate electricity
View Answer
Explanation: A power plant is an industrial facility that uses primary energy to generate electricity. To supply power to the electrical grid for society’s electrical needs, most power plants use one or more generators that convert mechanical energy into electrical energy.
2. Which of the following is a type of power plant?
a) Thermal power plant
b) Nuclear power plant
c) Hydropower plant
d) All of the mentioned
View Answer
Explanation: Power plants are broadly classified into three types depending on the type of fuel used. They are:
i) Thermal power plant
ii) Nuclear power plant
iii) Hydropower power plant
3. What is a hydropower plant?
a) Mechanical energy from the stagnant water currents
b) Electrical energy from the moving water currents
c) Potential energy from the water currents
d) Electrical energy from the moving water currents
View Answer
Explanation: A hydropower plant generates electrical energy from the moving water currents.
4. Which of the following is the cheapest plant in operation and maintenance?
a) Thermal power plant
b) Nuclear power plant
c) Hydropower plant
d) All of the mentioned
View Answer
Explanation: A hydropower plant is the cheapest plant in operation and maintenance.
5. Where was India’s first nuclear power plant was installed at?
a) Obninsk
b) Tarapur, Maharashtra
c) Boisar, Maharastra
d) None of the mentioned
View Answer
Explanation: India’s first nuclear power plant was installed at Tarapur, Maharashtra which consisted of two reactors, each generating around 150 MW of electricity.
6. Which of the following kind of energy output is obtained from a ‘Steam Power Plant’?
a) Electricity
b) Thermal energy
c) Sound energy
d) Heat energy
View Answer
Explanation: A ‘Steam Power Plant’ is used primarily for electricity generation.
7. Which of the following are the components of a Steam Power Plant?
a) Boiler, Turbine, Condenser, Pump
b) Boiler, Turbine, Pump, Expansion valve
c) Evaporator, Condenser, Boiler, Turbine
d) Evaporator, Condenser, Boiler, Expansion valve
View Answer
Explanation: A Steam Power Plant has the sequence,
Boiler, Turbine, Condenser, Pump.
8. Which of the following is also known as Coal used in power plant?
a) coke
b) soft coal
c) charcoal
d) steam coal
View Answer
Explanation: Because this coal is used to generate steam.
9. The net change in internal energy in a steam power plant is?
a) Zero
b) Positive
c) Negative
d) None of the mentioned
View Answer
Explanation: As the steam power plant is based on a cyclic process. A cyclic process has a net change in internal energy=0.
10. 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 intermediate stage
c) regeneration use of steam for heating Boiler feed water
d) all of the mentioned
View Answer
Explanation: The regenerative features effectively raise the nominal cycle heat input temperature, by reducing the addition of heat from the Boiler/fuel source at the relatively low feedwater temperatures that would exist without regenerative feedwater heating.
11. The overall efficiency of a power plant is given by __________
a) 3600/AP
b) 3600/NPHR
b) 3600/HHV
c) 3600/NTO
View Answer
Explanation: The overall efficiency of a power plant is given by ɳ = 3600/NPHR.
12. Which of the following is an important measure of performance in for a power plant?
a) NTO
b) HHV
c) AP
d) NPHR
View Answer
Explanation: NPHR- net plant heat rate is the most important measure of performance for power plant. AP-auxillary power NTO-net turbine output NTHR-net turbine heat rate.
13. Why is the deaerator not employed in water-cooled & moderated nuclear power plants?
a) due to regeneration
b) due to reheating
c) due to radioactivity release in degeneration
d) due to emissivity of degeneration
View Answer
Explanation: The deaerator is not employed in water-cooled & moderated nuclear power plants because of the radioactivity released in degeneration.
14. What is the maximum content of moisture allowed at the turbine exhaust in the steam power plant?
a) 15 %
b) 30 %
c) 40 %
d) 50 %
View Answer
Explanation: The maximum content of moisture allowed at the turbine exhaust in the steam power plant is 15 %.
15. The steam from steam generator of a nuclear power plant is best described as __________
a) saturated dry steam
b) saturated wet steam
c) supercritical steam
d) superheated steam
View Answer
Explanation: Steam contains moisture after coming out of boiler.
16. Efficiency of a power plant is more in summers or winters?
a) same in both
b) depends on the variation
c) summers
d) winters
View Answer
Explanation: In summers the heat loss is more so efficiency is less.
17. Steam Power Plants are more popular in electric power generation because ___________
a) Work output of turbine is equal to work input to the pump
b) Work output of turbine is very large than work input to the pump
c) Work output of turbine is very small than work input to the pump
d) None of the mentioned
View Answer
Explanation: In a Steam Power Plant, the positive difference of turbine work & pump work makes it useful in electricity generation.
18. Rankine cycle efficiency of a good Steam Power Plant may be in the range of?
a) 35 to 45%
b) 70 to 80%
c) 90 to 95%
d) 15 to 20%
View Answer
Explanation: Efficiency of Rankine cycle in actual working condition is found to be between 35 to 45%.
19. By superposing a high-temperature power plant as a topping unit to the steam plant, the energy conversion efficiency achieved is?
a) minimum
b) maximum
c) higher
d) lower
View Answer
Explanation: By superposing a high temperature power plant as a topping unit to the steam plant, the energy conversion efficiency achieved is higher from fuel to electricity.
20. In a typical layout of a 215MW reheat power plant, the feed in the boiler is at?
a) 250 degree Centigrade
b) 238 degree Centigrade
c) 280 degree Centigrade
d) 230 degree Centigrade
View Answer
Explanation: In a typical layout of a 215MW reheat power plant, the feed in the boiler is at 238 degree Centigrade.
21. Why deaerator is not used in water-cooled and moderated nuclear power plant?
a) not mechanically possible
b) not safe
c) not economical
d) radioactivity
View Answer
Explanation: deaerator is not used in water cooled and moderated nuclear power plant because of the concern regarding radioactivity release with deaeration.
22. The gas turbine power plant mainly uses which among the following fuels?
a) Kerosene oil and diesel oil and residual oil
b) Natural gas and liquid petroleum fuel
c) Coal and Peat
d) Gas oil
View Answer
Explanation: Natural gas and liquid petroleum fuel are among the two fuels used in a gas turbine.
23. Reflector in nuclear power plants __________ neutron leakage.
a) decreases
b) has no effect
c) increases
d) all of the mentioned
View Answer
Explanation: Reflector in nuclear power plants decreases neutron leakage.
24. What is the head of water available at turbine inlet in hydro-electric power plant called?
a) gross head
b) net head
c) tail race
d) head race
View Answer
Explanation: the head of water available at turbine inlet in hydro-electric power plant called Net Head.
25. What is the purpose of using open heaters in steam power plants?
a) feedwater deaeration
b) feedwater carbonisation
c) feedwater esterification
d) feedwater purification
View Answer
Explanation: In most steam power plants, closed heaters are more favored than open heaters & so are used primarily for the purpose of feedwater deaeration.
26. Which of these is not auxiliary equipment in a power plant?
a) Conveyors
b) Galvanisers
c) Fans
d) Crushers
View Answer
Explanation: The auxiliary equipment in a power plant are those equipment which are driven by the electricity taken from the generated power of the plant.
27. Which of the following is generally used as a moderator in nuclear power plants?
a) graphite
b) heavy water
c) concrete
d) graphite & concrete
View Answer
Explanation: A moderator generally used in nuclear power plants is made up of graphite & concrete.
28. Common size unit of a Steam Power Plant is?
a) 500 MW(e)
b) 150 MW(e)
c) 300 MW(e)
d) 30 MW(e)
View Answer
Explanation: The most common size steam power plant is of 500 MW(e). Further large size plants have been built, but aren’t found in common usage.
29. A moderator, in nuclear power plants, is a medium introduced into the fuel mass in order to __________
a) control the reaction
b) reduce the temperatur
c) extract heat from nuclear reaction
d) slow down the speed of fast moving neutrons
View Answer
Explanation: A moderator, in nuclear power plants, is a medium introduced into the fuel mass in order to slow down the speed of fast moving neutrons.
30. What % is the investment cost in Conventional steam power plant more than those in the combined cycle plants?
a) 40
b) 30
c) 60
d) 20
View Answer
Explanation: The investment cost in Conventional steam power plant is 30% more than those in the combined cycle plants.
31. The overall steam turbine generator arrangement of a power plant is designated as which of the following compound on the basis of shaft orientation?
a) tandem & cross
b) cross
c) tandem
d) none of the mentioned
View Answer
Explanation: The overall steam turbine generator arrangement of a power plant is designated as tandem or cross-compound on the basis of shaft orientation.
32. Air pollution in an MHD-steam power plant is caused due to the formation of which of the following compounds?
a) carbonates and bicarbonates
b) oxides and carbonates
c) chlorides and hydroxides
d) oxides and hydroxides
View Answer
Explanation: Oxides and hydroxides of seeding element formed cause air pollution.
33. Air-Preheater in a steam power plant _____________
a) Raises the temperature of the furnace gases
b) Recovers the heat from the flue gases leaving the economiser
c) Improves combustion rate
d) All of the mentioned
View Answer
Explanation: Air- preheater in a steam power plant recovers the heat from the flue gases leaving the economiser, improves combustion rate, raises temperature of the furnace gases, etc.
34. In which of the following power plants spray ponds are used to cool the warm water coming from the condenser?
a) Small power plants
b) Medium power plants
c) Both medium and large power plants
d) Large power plants
View Answer
Explanation: Spray ponds are used to cool the warm water coming from the condenser in small power plants.
35. Which of the following kind of a process does a ‘Steam Power Plant’ undergoes?
a) Cyclic
b) Irreversible
c) Expansion
d) Adiabatic
View Answer
Explanation: As the internal energy change in the ‘Steam Power Plant’ is ZERO. Hence, the entire plant obeys a Cyclic Process.
Chapterwise Multiple Choice Questions on Power Plant Engineering
- Analysis of Steam Engine
- Combined Cycle Power Generation
- Fuels & Combustion
- Nuclear Power Plants
- Hydroelectric Power Plant
- Diesel Engine & Gas Turbine Power Plants
- Combustion Mechanism, Equipment & Firing Methods
- Basic Thermodynamic Cycles
- Electricity Generation
- Steam Generation
- Magnetohydrodynamic Systems
- Solar Energy and Environmental Degradation
1. Power Plant Engineering MCQ on Analysis of Steam Engine
The section contains Power Plant Engineering multiple choice questions and answers on steam power plant and its efficiency, rankine and brayton cycle, mean temperature of heat, steam reheating, regeneration, feed water reheaters and deaerator.
2. Power Plant Engineering Multiple Choice Questions on Combined Cycle Power Generation
The section contains Power Plant Engineering questions and answers on binary vapour cycles, coupled cycles and gas turbine steam power plant.
3. Power Plant Engineering MCQ on Fuels & Combustion
The section contains Power Plant Engineering MCQs on fuel oil, coal-oil and coal-water, biomass, draught system and heat of combustion.
4. Multiple Choice Questions on Nuclear Power Plants
The section contains Power Plant Engineering multiple choice questions and answers on chemical and nuclear reactions, nuclear fission, chain reaction, radioactive decay and fission analysis.
5. MCQ on Hydroelectric Power Plant
The section contains Power Plant Engineering questions and answers on pelton wheel turbine, kaplan, francis and deriaz turbines.
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6. Multiple Choice Questions on Diesel Engine & Gas Turbine Power Plants
The section contains Power Plant Engineering MCQs on diesel engine basis, types and its applications and diesel engine analysis.
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7. Power Plant Engineering MCQ on Combustion Mechanism, Equipment & Firing Methods
The section contains Power Plant Engineering multiple choice questions and answers on pulverisation and gasifiers, kinetic and diffusion control and coal firing systems.
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8. Power Plant Engineering Multiple Choice Questions on Basic Thermodynamic Cycles
The section contains Power Plant Engineering questions and answers on combined cycle power generation and its advantages, brayton rankine combined plants.
9. Power Plant Engineering MCQ on Electricity Generation
The section contains Power Plant Engineering MCQs on steam turbine basis, turbine efficiency and blading, nozzels and its types, electricity generation.
10. Power Plant Engineering Multiple Choice Questions on Steam Generation
The section contains Power Plant Engineering multiple choice questions and answers on steam generators and its types, fire and water tube boilers, reheaters, air preheaters and steam purity.
11. Power Plant Engineering MCQ on Magnetohydrodynamic Systems
The section contains Power Plant Engineering questions and answers on magnetohydrodynamic plant basics and power generation.
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12. Power Plant Engineering Multiple Choice Questions on Solar Energy and Environmental Degradation
The section contains Power Plant Engineering MCQs on fuel cell, energy sources, environmental degradation and miscellaneous.
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Wish you the best in your endeavor to learn and master Power Plant!
