NYC Custodian Engineer (Board Of
Education) Exam Practice Questions And
Correct Answers (Verified Answers) Plus
Rationales
1. The primary responsibility of a NYC Custodian Engineer is to:
A. Teach vocational classes
B. Supervise cafeteria operations
C. Operate and maintain school buildings and building systems
D. Manage student transportation
Answer: C
Rationale: The Custodian Engineer is responsible for the overall operation,
maintenance, and safety of school facilities and mechanical systems.
2. Which fuel is most commonly used in NYC public school boiler
systems?
A. Natural gas
B. Coal
C. Fuel oil
D. Propane
Answer: C
,Rationale: Many NYC school boilers traditionally operate on fuel oil,
although some have dual-fuel capability.
3. A boiler safety valve is designed to:
A. Increase steam pressure
B. Regulate water temperature
C. Relieve excess pressure
D. Measure fuel consumption
Answer: C
Rationale: Safety valves automatically release pressure to prevent boiler
explosions.
4. The purpose of a boiler blowdown is to:
A. Clean burner nozzles
B. Reduce fuel usage
C. Remove sediment and impurities
D. Increase steam production
Answer: C
Rationale: Blowdown removes sludge and dissolved solids that accumulate
in the boiler.
5. What instrument is used to measure steam pressure?
A. Thermometer
B. Water gauge
, C. Pressure gauge
D. Manometer
Answer: C
Rationale: Pressure gauges indicate the operating pressure within steam
systems.
6. In an HVAC system, the primary function of a chiller is to:
A. Heat air
B. Filter dust
C. Remove heat from water
D. Increase humidity
Answer: C
Rationale: Chillers cool water that is circulated for air conditioning.
7. Which fire extinguisher is best for electrical fires?
A. Class A
B. Class B
C. Class C
D. Class D
Answer: C
Rationale: Class C extinguishers are designed for energized electrical
equipment.
8. What is the main purpose of preventive maintenance?
, A. Repair damaged equipment
B. Reduce staff
C. Prevent equipment failure
D. Increase building age
Answer: C
Rationale: Preventive maintenance minimizes breakdowns and extends
equipment life.
9. A malfunctioning steam trap will most likely cause:
A. Higher lighting costs
B. Reduced heating efficiency
C. Improved air quality
D. Electrical overload
Answer: B
Rationale: Faulty steam traps waste steam and reduce heating system
efficiency.
10. Which device prevents backflow in plumbing systems?
A. Gate valve
B. Globe valve
C. Backflow preventer
D. Pressure reducer
Answer: C
Rationale: Backflow preventers protect potable water from contamination.
Education) Exam Practice Questions And
Correct Answers (Verified Answers) Plus
Rationales
1. The primary responsibility of a NYC Custodian Engineer is to:
A. Teach vocational classes
B. Supervise cafeteria operations
C. Operate and maintain school buildings and building systems
D. Manage student transportation
Answer: C
Rationale: The Custodian Engineer is responsible for the overall operation,
maintenance, and safety of school facilities and mechanical systems.
2. Which fuel is most commonly used in NYC public school boiler
systems?
A. Natural gas
B. Coal
C. Fuel oil
D. Propane
Answer: C
,Rationale: Many NYC school boilers traditionally operate on fuel oil,
although some have dual-fuel capability.
3. A boiler safety valve is designed to:
A. Increase steam pressure
B. Regulate water temperature
C. Relieve excess pressure
D. Measure fuel consumption
Answer: C
Rationale: Safety valves automatically release pressure to prevent boiler
explosions.
4. The purpose of a boiler blowdown is to:
A. Clean burner nozzles
B. Reduce fuel usage
C. Remove sediment and impurities
D. Increase steam production
Answer: C
Rationale: Blowdown removes sludge and dissolved solids that accumulate
in the boiler.
5. What instrument is used to measure steam pressure?
A. Thermometer
B. Water gauge
, C. Pressure gauge
D. Manometer
Answer: C
Rationale: Pressure gauges indicate the operating pressure within steam
systems.
6. In an HVAC system, the primary function of a chiller is to:
A. Heat air
B. Filter dust
C. Remove heat from water
D. Increase humidity
Answer: C
Rationale: Chillers cool water that is circulated for air conditioning.
7. Which fire extinguisher is best for electrical fires?
A. Class A
B. Class B
C. Class C
D. Class D
Answer: C
Rationale: Class C extinguishers are designed for energized electrical
equipment.
8. What is the main purpose of preventive maintenance?
, A. Repair damaged equipment
B. Reduce staff
C. Prevent equipment failure
D. Increase building age
Answer: C
Rationale: Preventive maintenance minimizes breakdowns and extends
equipment life.
9. A malfunctioning steam trap will most likely cause:
A. Higher lighting costs
B. Reduced heating efficiency
C. Improved air quality
D. Electrical overload
Answer: B
Rationale: Faulty steam traps waste steam and reduce heating system
efficiency.
10. Which device prevents backflow in plumbing systems?
A. Gate valve
B. Globe valve
C. Backflow preventer
D. Pressure reducer
Answer: C
Rationale: Backflow preventers protect potable water from contamination.
