NYC CUSTODIAN ENGINEER EXAM
AND PRACTICE EXAM NEWEST 2026/
2027 TEST BANK| CUSTODIAN
ENGINEER (BOARD OF EDUCATION)
EXAM PREP QUESTIONS AND
CORRECT 100% VERIFIED ANSWERS
WITH RATIONALES GUARANTEED
PASS (GRADED A+)
Question 1
A boiler operating at higher-than-normal pressure should first be
checked for:
A. Low water level
B. Malfunctioning pressure controls
C. Dirty boiler tubes
D. Open condensate return valve
Answer: B. Malfunctioning pressure controls
Rationale: Pressure controls regulate boiler pressure. If they
fail or are improperly calibrated, excessive pressure can
develop, creating a safety hazard.
,Question 2
What is the primary purpose of a building management system
(BMS)?
A. Managing payroll records
B. Monitoring and controlling building systems
C. Scheduling custodial staff vacations
D. Tracking student attendance
Answer: B. Monitoring and controlling building systems
Rationale: A BMS integrates HVAC, lighting, alarms, and other
systems to improve efficiency, safety, and operational control.
Question 3
Which fire extinguisher is most appropriate for an energized
electrical fire?
A. Class A
B. Class B
C. Class C
D. Class K
Answer: C. Class C
Rationale: Class C extinguishers are specifically designed for
fires involving energized electrical equipment.
Question 4
,The primary purpose of preventive maintenance is to:
A. Increase emergency repairs
B. Reduce equipment lifespan
C. Prevent unexpected equipment failures
D. Eliminate all operating costs
Answer: C. Prevent unexpected equipment failures
Rationale: Preventive maintenance helps identify and correct
issues before they cause breakdowns, reducing downtime and
repair expenses.
Question 5
What instrument is commonly used to measure electrical
voltage?
A. Manometer
B. Hygrometer
C. Voltmeter
D. Tachometer
Answer: C. Voltmeter
Rationale: A voltmeter measures electrical potential difference
between two points in a circuit.
Question 6
, A clogged air filter in an HVAC system will most likely result
in:
A. Increased airflow
B. Reduced system efficiency
C. Lower energy consumption
D. Improved indoor air quality
Answer: B. Reduced system efficiency
Rationale: Restricted airflow forces HVAC equipment to work
harder, reducing efficiency and increasing energy use.
Question 7
Lockout/Tagout procedures are primarily intended to:
A. Reduce water consumption
B. Improve cleaning schedules
C. Prevent accidental equipment startup during servicing
D. Monitor employee attendance
Answer: C. Prevent accidental equipment startup during
servicing
Rationale: Lockout/Tagout protects workers by ensuring
machinery remains de-energized during maintenance activities.
Question 8
AND PRACTICE EXAM NEWEST 2026/
2027 TEST BANK| CUSTODIAN
ENGINEER (BOARD OF EDUCATION)
EXAM PREP QUESTIONS AND
CORRECT 100% VERIFIED ANSWERS
WITH RATIONALES GUARANTEED
PASS (GRADED A+)
Question 1
A boiler operating at higher-than-normal pressure should first be
checked for:
A. Low water level
B. Malfunctioning pressure controls
C. Dirty boiler tubes
D. Open condensate return valve
Answer: B. Malfunctioning pressure controls
Rationale: Pressure controls regulate boiler pressure. If they
fail or are improperly calibrated, excessive pressure can
develop, creating a safety hazard.
,Question 2
What is the primary purpose of a building management system
(BMS)?
A. Managing payroll records
B. Monitoring and controlling building systems
C. Scheduling custodial staff vacations
D. Tracking student attendance
Answer: B. Monitoring and controlling building systems
Rationale: A BMS integrates HVAC, lighting, alarms, and other
systems to improve efficiency, safety, and operational control.
Question 3
Which fire extinguisher is most appropriate for an energized
electrical fire?
A. Class A
B. Class B
C. Class C
D. Class K
Answer: C. Class C
Rationale: Class C extinguishers are specifically designed for
fires involving energized electrical equipment.
Question 4
,The primary purpose of preventive maintenance is to:
A. Increase emergency repairs
B. Reduce equipment lifespan
C. Prevent unexpected equipment failures
D. Eliminate all operating costs
Answer: C. Prevent unexpected equipment failures
Rationale: Preventive maintenance helps identify and correct
issues before they cause breakdowns, reducing downtime and
repair expenses.
Question 5
What instrument is commonly used to measure electrical
voltage?
A. Manometer
B. Hygrometer
C. Voltmeter
D. Tachometer
Answer: C. Voltmeter
Rationale: A voltmeter measures electrical potential difference
between two points in a circuit.
Question 6
, A clogged air filter in an HVAC system will most likely result
in:
A. Increased airflow
B. Reduced system efficiency
C. Lower energy consumption
D. Improved indoor air quality
Answer: B. Reduced system efficiency
Rationale: Restricted airflow forces HVAC equipment to work
harder, reducing efficiency and increasing energy use.
Question 7
Lockout/Tagout procedures are primarily intended to:
A. Reduce water consumption
B. Improve cleaning schedules
C. Prevent accidental equipment startup during servicing
D. Monitor employee attendance
Answer: C. Prevent accidental equipment startup during
servicing
Rationale: Lockout/Tagout protects workers by ensuring
machinery remains de-energized during maintenance activities.
Question 8
