250+ TOP MCQs on Steam Power Plant and Answers

Power Plant Engineering Multiple Choice Questions on “Steam Power Plant”.

1. Which of these is a ‘fissile fuel’?
a) Thorium
b) Carbon
c) Potassium
d) Graphite
Answer: a
Clarification: A fissile fuel is one that is based on a sustained chain reaction with neutrons of any energy.

2. Which of these is a ‘working fluid’ in liquid phase?
a) Water
b) Steam
c) Mercury
d) Oxygen
Answer: a
Clarification: The working fluid is water in liquid phase & steam in gas phase.

3. Which of these is an output of a ‘Furnace’?
a) Fuel gas
b) Air
c) Flue gases
d) Water Vapor
Answer: c
Clarification: A furnace takes in a Fuel gas, Air & Water Vapour while it gives off Flue Gases.

4. What kind of energy output is obtained from a ‘Steam Power Plant’?
a) Heat energy
b) Sound energy
c) Electricity
d) Thermal energy
Answer: c
Clarification: A ‘Steam Power Plant’ is used primarily for electricity generation.

5. What kind of a process does a ‘Steam Power Plant’ undergoes?
a) Adiabatic
b) Cyclic
c) Irreversible
d) Expansion
Answer: b
Clarification: As the internal energy change in the ‘Steam Power Plant’ is ZERO. Hence, the entire plant obeys a Cyclic Process.

6. Water that is fed back to the boiler by the pump is called?
a) Adsorbate
b) Absorbate
c) Condenset
d) Condensate
Answer: d
Clarification: The water feedback is from condenser & its called condensate.

7. The net change in internal energy in a steam power plant is?
a) Positive
b) Negative
c) Zero
d) None of the mentioned
Answer: c
Clarification: As the steam power plant is based on a cyclic process. A cyclic process has a net change in internal energy=0.

8. The product of efficiency & heat transferred to the working fluid is?
a) Net temperature change
b) Net work done
c) Net enthalpy change
d) None of the mentioned
Answer: b
Clarification: The formula of efficiency of a steam power plant is,
Efficiency = net work done/net heat transferred

9. What are the components of a Steam Power Plant?
a) Evaporator, Condenser, Boiler, Expansion valve
b) Evaporator, Condenser, Boiler, Turbine
c) Boiler, Turbine, Condenser, Pump
d) Boiler, Turbine, Pump, Expansion valve
Answer: c
Clarification: A Steam Power Plant has the sequence,
Boiler, Turbine, Condenser, Pump.

10. Shaft work is fed to __________ for getting an electrical output.
a) Motor
b) Generator
c) Rotor
d) Accelerator
Answer: b
Clarification: The flow in a Steam Power Plant follows the sequence,
Source-Shaft-Generator.