NYC Health + Hospitals Power Plant
Operator Examination Practice Exam
2026 | 100 Questions & Answers with
Detailed Rationales | Complete Exam
Prep & Study Guide
1. What is the primary function of a power plant operator?
A. Designing new buildings
B. Operating and monitoring power generation equipment
C. Installing hospital plumbing fixtures
D. Performing medical procedures
Answer: Operating and monitoring power generation equipment
Rationale: Power plant operators are responsible for safely operating,
controlling, and monitoring boilers, turbines, generators, and related systems to
ensure reliable power production.
2. A boiler converts water into steam by using:
A. Electrical resistance only
B. Refrigerant pressure
,C. Heat energy from fuel combustion
D. Mechanical vibration
Answer: Heat energy from fuel combustion
Rationale: Boilers use heat from fuel or another energy source to convert water
into steam for heating or power generation.
3. The purpose of a boiler safety valve is to:
A. Increase steam pressure
B. Reduce fuel consumption
C. Prevent excessive pressure buildup
D. Improve water circulation
Answer: Prevent excessive pressure buildup
Rationale: Safety valves automatically release steam when pressure exceeds
safe operating limits, protecting personnel and equipment.
4. A centrifugal pump primarily converts:
A. Heat into electricity
B. Mechanical energy into fluid movement
C. Steam into fuel
D. Electricity into pressure only
Answer: Mechanical energy into fluid movement
Rationale: Pumps use mechanical energy from a motor to move liquids through
piping systems.
5. The instrument used to measure steam pressure is a:
,A. Thermometer
B. Flow meter
C. Pressure gauge
D. Hygrometer
Answer: Pressure gauge
Rationale: Pressure gauges display the internal pressure of steam, water, or
other systems.
6. The main purpose of a condenser in a steam system is to:
A. Increase steam temperature
B. Convert steam back into water
C. Increase boiler pressure
D. Remove fuel from the system
Answer: Convert steam back into water
Rationale: Condensers cool exhaust steam and return it to liquid form for reuse
in the boiler cycle.
7. A generator converts:
A. Electrical energy into heat
B. Mechanical energy into electrical energy
C. Chemical energy into water
D. Steam into fuel
Answer: Mechanical energy into electrical energy
Rationale: Generators use mechanical rotation to produce electrical power
through electromagnetic induction.
, 8. The device that controls steam flow is called a:
A. Filter
B. Valve
C. Bearing
D. Transformer
Answer: Valve
Rationale: Valves regulate, direct, or stop the flow of steam, water, and other
fluids.
9. Boiler feedwater should be treated to prevent:
A. Increased lighting
B. Scale and corrosion
C. Higher voltage
D. Excess air movement
Answer: Scale and corrosion
Rationale: Water impurities can create deposits and damage boiler components,
reducing efficiency and safety.
10.The purpose of a deaerator is to remove:
A. Fuel particles
B. Steam pressure
C. Dissolved oxygen from feedwater
D. Electrical current
Answer: Dissolved oxygen from feedwater
Rationale: Removing oxygen prevents corrosion inside boilers and steam piping.
Operator Examination Practice Exam
2026 | 100 Questions & Answers with
Detailed Rationales | Complete Exam
Prep & Study Guide
1. What is the primary function of a power plant operator?
A. Designing new buildings
B. Operating and monitoring power generation equipment
C. Installing hospital plumbing fixtures
D. Performing medical procedures
Answer: Operating and monitoring power generation equipment
Rationale: Power plant operators are responsible for safely operating,
controlling, and monitoring boilers, turbines, generators, and related systems to
ensure reliable power production.
2. A boiler converts water into steam by using:
A. Electrical resistance only
B. Refrigerant pressure
,C. Heat energy from fuel combustion
D. Mechanical vibration
Answer: Heat energy from fuel combustion
Rationale: Boilers use heat from fuel or another energy source to convert water
into steam for heating or power generation.
3. The purpose of a boiler safety valve is to:
A. Increase steam pressure
B. Reduce fuel consumption
C. Prevent excessive pressure buildup
D. Improve water circulation
Answer: Prevent excessive pressure buildup
Rationale: Safety valves automatically release steam when pressure exceeds
safe operating limits, protecting personnel and equipment.
4. A centrifugal pump primarily converts:
A. Heat into electricity
B. Mechanical energy into fluid movement
C. Steam into fuel
D. Electricity into pressure only
Answer: Mechanical energy into fluid movement
Rationale: Pumps use mechanical energy from a motor to move liquids through
piping systems.
5. The instrument used to measure steam pressure is a:
,A. Thermometer
B. Flow meter
C. Pressure gauge
D. Hygrometer
Answer: Pressure gauge
Rationale: Pressure gauges display the internal pressure of steam, water, or
other systems.
6. The main purpose of a condenser in a steam system is to:
A. Increase steam temperature
B. Convert steam back into water
C. Increase boiler pressure
D. Remove fuel from the system
Answer: Convert steam back into water
Rationale: Condensers cool exhaust steam and return it to liquid form for reuse
in the boiler cycle.
7. A generator converts:
A. Electrical energy into heat
B. Mechanical energy into electrical energy
C. Chemical energy into water
D. Steam into fuel
Answer: Mechanical energy into electrical energy
Rationale: Generators use mechanical rotation to produce electrical power
through electromagnetic induction.
, 8. The device that controls steam flow is called a:
A. Filter
B. Valve
C. Bearing
D. Transformer
Answer: Valve
Rationale: Valves regulate, direct, or stop the flow of steam, water, and other
fluids.
9. Boiler feedwater should be treated to prevent:
A. Increased lighting
B. Scale and corrosion
C. Higher voltage
D. Excess air movement
Answer: Scale and corrosion
Rationale: Water impurities can create deposits and damage boiler components,
reducing efficiency and safety.
10.The purpose of a deaerator is to remove:
A. Fuel particles
B. Steam pressure
C. Dissolved oxygen from feedwater
D. Electrical current
Answer: Dissolved oxygen from feedwater
Rationale: Removing oxygen prevents corrosion inside boilers and steam piping.
