CERTIFICATION EXAM QUESTIONS AND CORRECT
ANSWERS (VERIFIED ANSWERS) Q&A 2026
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1. What is the primary function of a power plant?
A. Store electricity
B. Generate electrical energy from fuel sources
C. Reduce voltage only
D. Convert electricity to heat
Rationale: Power plants convert various energy sources into
electricity.
Correct Answer: B
2. Which energy source is most commonly used in thermal
power plants?
A. Wind
B. Coal
C. Solar
D. Geothermal
Rationale: Coal is widely used in thermal steam generation.
Correct Answer: B
3. The main purpose of a generator is to:
A. Store energy
B. Convert mechanical energy to electrical energy
C. Increase pressure
,D. Reduce heat
Rationale: Generators use electromagnetic induction.
Correct Answer: B
4. What drives the turbine in a steam power plant?
A. Water directly
B. High-pressure steam
C. Electricity
D. Air pressure
Rationale: Steam energy rotates turbine blades.
Correct Answer: B
5. Which cycle is commonly used in steam power plants?
A. Carnot cycle
B. Rankine cycle
C. Otto cycle
D. Brayton cycle
Rationale: Rankine cycle is standard for steam plants.
Correct Answer: B
6. Electrical power is measured in:
A. Joules
B. Watts
C. Newtons
D. Volts
Rationale: Watt is the SI unit of power.
Correct Answer: B
7. Frequency of AC power in most US systems is:
A. 25 Hz
, B. 40 Hz
C. 50 Hz
D. 60 Hz
Rationale: Standard grid frequency is 60 Hz.
Correct Answer: D
8. A boiler primarily converts:
A. Steam to water
B. Water to steam
C. Heat to electricity
D. Electricity to heat
Rationale: Boilers produce steam from water.
Correct Answer: B
9. The function of a condenser is to:
A. Heat steam
B. Convert steam to water
C. Increase pressure
D. Generate electricity
Rationale: Condensers cool steam back to liquid.
Correct Answer: B
10. What is the main fuel in nuclear power plants?
A. Uranium
B. Coal
C. Gasoline
D. Diesel
Rationale: Uranium undergoes fission to release energy.
Correct Answer: A