NYC DCAS PLANT MAINTAINER (HOSPITALS)
EXAM
2026–2027 | EXAM NO. 7070 | 210 ORIGINAL PRACTICE
QUESTIONS & ANSWERS
NYC Health + Hospitals • Boilers • Pumps • HVAC • Refrigeration • Safety • Tools •
Calculations • Maintenance Records
SAFETY AND HAZARDOUS ENERGY
Question 1: Why must safety interlocks not be bypassed for convenience?
A. They are optional during busy shifts
B. They prevent hazardous operation and their defeat can expose people and
equipment to serious risk
C. They only affect energy bills
D. They are designed to be removed during routine operation
CORRECT ANSWER: B. They prevent hazardous operation and their defeat
can expose people and equipment to serious risk
Rationale: Interlocks are engineered safeguards; only authorized procedures
may permit controlled testing or maintenance.
HVAC AND REFRIGERATION
Question 2: What should be done if a hospital critical-area room pressure
alarm indicates an abnormal condition?
A. Notify the responsible team promptly and follow the approved response while
protecting patient care
B. Open every door to equalize pressure
C. Disable the alarm permanently
D. Ignore it until scheduled maintenance
CORRECT ANSWER: A. Notify the responsible team promptly and follow the
approved response while protecting patient care
Rationale: Pressure relationships may be part of infection-control design;
investigate promptly using facility protocols.
TROUBLESHOOTING AND HOSPITAL MAINTENANCE
NYC DCAS Plant Maintainer (Hospitals) Exam 7070 | Practice Guide • Page 1
,Question 3: What should a maintainer do if an instrument calibration label is
past due?
A. Assume it remains accurate indefinitely
B. Change the label date by hand
C. Follow the site process to verify calibration status before relying on the
instrument
D. Use it for critical measurements without reporting
CORRECT ANSWER: C. Follow the site process to verify calibration status
before relying on the instrument
Rationale: An overdue calibration status can affect confidence in measurements;
follow the site's instrument-control procedure.
PIPING, ELECTRICAL, CALCULATIONS, AND RECORDS
Question 4: Why should backflow prevention be maintained on potable-
water connections where required?
A. Protect drinking water from contamination entering from downstream
systems
B. Control HVAC humidity
C. Increase pump cavitation
D. Reduce the need for testing
CORRECT ANSWER: A. Protect drinking water from contamination entering
from downstream systems
Rationale: Backflow devices protect potable water from cross-connections and
reverse flow.
BOILER OPERATION AND SAFETY
Question 5: What is the purpose of the boiler feedwater pump?
A. To circulate room air
B. To vent combustion gases
C. To deliver water into the boiler against boiler pressure
D. To cool the burner motor
CORRECT ANSWER: C. To deliver water into the boiler against boiler
pressure
Rationale: The feedwater pump supplies water to the boiler and must develop
sufficient discharge pressure.
TOOLS, LUBRICATION, AND MATERIALS
NYC DCAS Plant Maintainer (Hospitals) Exam 7070 | Practice Guide • Page 2
,Question 6: What should determine the lubricant used for a motor bearing?
A. Manufacturer specification, bearing design, speed, temperature, and service
conditions
B. Whatever lubricant is nearest
C. The worker's preference alone
D. The color of the container only
CORRECT ANSWER: A. Manufacturer specification, bearing design, speed,
temperature, and service conditions
Rationale: Lubricants differ in viscosity, thickener, additives, and compatibility;
follow equipment specifications.
TROUBLESHOOTING AND HOSPITAL MAINTENANCE
Question 7: A maintenance checklist requires recording a bearing
temperature of 145°F. The measured value is 168°F and the baseline is
150°F. What should the maintainer do?
A. Change the thermometer without reporting it
B. Record the actual reading and follow the specified escalation threshold
C. Write 145°F because that is the target
D. Erase the reading
CORRECT ANSWER: B. Record the actual reading and follow the specified
escalation threshold
Rationale: Record actual measurements accurately and respond according to the
procedure and threshold.
TOOLS, LUBRICATION, AND MATERIALS
Question 8: What does a calibrated multimeter measure depending on its
setting?
A. Electrical quantities such as voltage, current, or resistance
B. Only pipe diameter
C. Only steam quality
D. Only bearing vibration
CORRECT ANSWER: A. Electrical quantities such as voltage, current, or
resistance
Rationale: A multimeter measures selected electrical quantities when used within
its rating and proper procedure.
BOILER OPERATION AND SAFETY
NYC DCAS Plant Maintainer (Hospitals) Exam 7070 | Practice Guide • Page 3
, Question 9: Why should a burner flame generally be stable and appropriate
in shape and color for its design?
A. It replaces flue-gas testing
B. It guarantees the safety valve is working
C. It proves the boiler is overfilled
D. It indicates combustion is operating within intended conditions
CORRECT ANSWER: D. It indicates combustion is operating within intended
conditions
Rationale: An abnormal flame can indicate poor atomization, air-fuel imbalance,
dirty components, or other combustion faults.
HVAC AND REFRIGERATION
Question 10: Why must an air-conditioning condensate drain be kept clear?
A. It improves motor insulation automatically
B. Blocked drainage can cause overflow, water damage, and microbial growth
C. It raises refrigerant pressure to the correct value
D. It prevents all coil icing
CORRECT ANSWER: B. Blocked drainage can cause overflow, water
damage, and microbial growth
Rationale: Condensate must drain freely to avoid leaks and wet conditions.
SAFETY AND HAZARDOUS ENERGY
Question 11: What is a key purpose of personal protective equipment
(PPE)?
A. Guarantee no injury under any circumstances
B. Replace all engineering controls
C. Provide a final layer of protection against hazards after risks are assessed
D. Allow work to proceed without training
CORRECT ANSWER: C. Provide a final layer of protection against hazards
after risks are assessed
Rationale: PPE is part of a control strategy but does not replace isolation,
guarding, ventilation, or training.
HVAC AND REFRIGERATION
Question 12: What does a manometer measure in HVAC work?
A. Refrigerant purity directly
B. Lubricant color
C. Electrical frequency
D. Pressure difference, often used to assess duct static pressure or filter drop
NYC DCAS Plant Maintainer (Hospitals) Exam 7070 | Practice Guide • Page 4
EXAM
2026–2027 | EXAM NO. 7070 | 210 ORIGINAL PRACTICE
QUESTIONS & ANSWERS
NYC Health + Hospitals • Boilers • Pumps • HVAC • Refrigeration • Safety • Tools •
Calculations • Maintenance Records
SAFETY AND HAZARDOUS ENERGY
Question 1: Why must safety interlocks not be bypassed for convenience?
A. They are optional during busy shifts
B. They prevent hazardous operation and their defeat can expose people and
equipment to serious risk
C. They only affect energy bills
D. They are designed to be removed during routine operation
CORRECT ANSWER: B. They prevent hazardous operation and their defeat
can expose people and equipment to serious risk
Rationale: Interlocks are engineered safeguards; only authorized procedures
may permit controlled testing or maintenance.
HVAC AND REFRIGERATION
Question 2: What should be done if a hospital critical-area room pressure
alarm indicates an abnormal condition?
A. Notify the responsible team promptly and follow the approved response while
protecting patient care
B. Open every door to equalize pressure
C. Disable the alarm permanently
D. Ignore it until scheduled maintenance
CORRECT ANSWER: A. Notify the responsible team promptly and follow the
approved response while protecting patient care
Rationale: Pressure relationships may be part of infection-control design;
investigate promptly using facility protocols.
TROUBLESHOOTING AND HOSPITAL MAINTENANCE
NYC DCAS Plant Maintainer (Hospitals) Exam 7070 | Practice Guide • Page 1
,Question 3: What should a maintainer do if an instrument calibration label is
past due?
A. Assume it remains accurate indefinitely
B. Change the label date by hand
C. Follow the site process to verify calibration status before relying on the
instrument
D. Use it for critical measurements without reporting
CORRECT ANSWER: C. Follow the site process to verify calibration status
before relying on the instrument
Rationale: An overdue calibration status can affect confidence in measurements;
follow the site's instrument-control procedure.
PIPING, ELECTRICAL, CALCULATIONS, AND RECORDS
Question 4: Why should backflow prevention be maintained on potable-
water connections where required?
A. Protect drinking water from contamination entering from downstream
systems
B. Control HVAC humidity
C. Increase pump cavitation
D. Reduce the need for testing
CORRECT ANSWER: A. Protect drinking water from contamination entering
from downstream systems
Rationale: Backflow devices protect potable water from cross-connections and
reverse flow.
BOILER OPERATION AND SAFETY
Question 5: What is the purpose of the boiler feedwater pump?
A. To circulate room air
B. To vent combustion gases
C. To deliver water into the boiler against boiler pressure
D. To cool the burner motor
CORRECT ANSWER: C. To deliver water into the boiler against boiler
pressure
Rationale: The feedwater pump supplies water to the boiler and must develop
sufficient discharge pressure.
TOOLS, LUBRICATION, AND MATERIALS
NYC DCAS Plant Maintainer (Hospitals) Exam 7070 | Practice Guide • Page 2
,Question 6: What should determine the lubricant used for a motor bearing?
A. Manufacturer specification, bearing design, speed, temperature, and service
conditions
B. Whatever lubricant is nearest
C. The worker's preference alone
D. The color of the container only
CORRECT ANSWER: A. Manufacturer specification, bearing design, speed,
temperature, and service conditions
Rationale: Lubricants differ in viscosity, thickener, additives, and compatibility;
follow equipment specifications.
TROUBLESHOOTING AND HOSPITAL MAINTENANCE
Question 7: A maintenance checklist requires recording a bearing
temperature of 145°F. The measured value is 168°F and the baseline is
150°F. What should the maintainer do?
A. Change the thermometer without reporting it
B. Record the actual reading and follow the specified escalation threshold
C. Write 145°F because that is the target
D. Erase the reading
CORRECT ANSWER: B. Record the actual reading and follow the specified
escalation threshold
Rationale: Record actual measurements accurately and respond according to the
procedure and threshold.
TOOLS, LUBRICATION, AND MATERIALS
Question 8: What does a calibrated multimeter measure depending on its
setting?
A. Electrical quantities such as voltage, current, or resistance
B. Only pipe diameter
C. Only steam quality
D. Only bearing vibration
CORRECT ANSWER: A. Electrical quantities such as voltage, current, or
resistance
Rationale: A multimeter measures selected electrical quantities when used within
its rating and proper procedure.
BOILER OPERATION AND SAFETY
NYC DCAS Plant Maintainer (Hospitals) Exam 7070 | Practice Guide • Page 3
, Question 9: Why should a burner flame generally be stable and appropriate
in shape and color for its design?
A. It replaces flue-gas testing
B. It guarantees the safety valve is working
C. It proves the boiler is overfilled
D. It indicates combustion is operating within intended conditions
CORRECT ANSWER: D. It indicates combustion is operating within intended
conditions
Rationale: An abnormal flame can indicate poor atomization, air-fuel imbalance,
dirty components, or other combustion faults.
HVAC AND REFRIGERATION
Question 10: Why must an air-conditioning condensate drain be kept clear?
A. It improves motor insulation automatically
B. Blocked drainage can cause overflow, water damage, and microbial growth
C. It raises refrigerant pressure to the correct value
D. It prevents all coil icing
CORRECT ANSWER: B. Blocked drainage can cause overflow, water
damage, and microbial growth
Rationale: Condensate must drain freely to avoid leaks and wet conditions.
SAFETY AND HAZARDOUS ENERGY
Question 11: What is a key purpose of personal protective equipment
(PPE)?
A. Guarantee no injury under any circumstances
B. Replace all engineering controls
C. Provide a final layer of protection against hazards after risks are assessed
D. Allow work to proceed without training
CORRECT ANSWER: C. Provide a final layer of protection against hazards
after risks are assessed
Rationale: PPE is part of a control strategy but does not replace isolation,
guarding, ventilation, or training.
HVAC AND REFRIGERATION
Question 12: What does a manometer measure in HVAC work?
A. Refrigerant purity directly
B. Lubricant color
C. Electrical frequency
D. Pressure difference, often used to assess duct static pressure or filter drop
NYC DCAS Plant Maintainer (Hospitals) Exam 7070 | Practice Guide • Page 4
