NYC Health Hospitals Stationary
Engineer Exam Practice Questions And
Correct Answers (Verified Answers) Plus
Rationale 2026 Q&A| Instant Download
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1. NYC Health + Hospitals Stationary Engineer Examination is a civil
service title examination. The exam focuses on the knowledge
required to operate and maintain hospital central plants, including
high-pressure boilers, steam distribution systems, refrigeration
equipment, chillers, pumps, generators, HVAC systems, safety controls,
and mechanical/electrical systems. NYC Health + Hospitals uses the
civil service system for many non-managerial positions, and Stationary
Engineer (NYC H+H) is listed as a DCAS examination title.
I will prepare the practice examination in the requested format.
1. A stationary engineer working in a NYC Health + Hospitals central plant
is responsible for maintaining continuous operation of critical building
systems. During a normal shift, the engineer observes that the boiler water
,level is rapidly decreasing while the burner continues firing. Which action
is the safest and most appropriate first response to protect the boiler from
damage and prevent a possible unsafe condition?
A. Increase the firing rate to raise steam pressure faster
B. Shut down the burner, verify the low-water protection system, and
investigate the cause of the water loss
C. Open the main steam valve completely to reduce pressure
D. Add chemicals to the boiler water immediately without checking the
cause
Answer: B
The correct response is to shut down the burner and investigate because
low-water conditions can expose boiler heating surfaces, causing
overheating, tube failure, or a serious boiler accident. Safety devices must
be verified before returning equipment to service.
2. A high-pressure steam boiler in a hospital plant uses a safety valve as a
primary pressure protection device. What is the main purpose of the safety
valve?
A. To control normal steam pressure during routine operation
B. To automatically release steam when pressure exceeds a safe limit
C. To remove dissolved solids from boiler water
D. To regulate combustion air entering the burner
Answer: B
,A safety valve protects the boiler by automatically relieving excess pressure
when operating pressure exceeds the valve setting. It is not used for
normal pressure control or water treatment functions.
3. A stationary engineer notices that a centrifugal pump supplying chilled
water to an air-conditioning system has reduced flow and increased
vibration. Which condition is the most likely cause?
A. Proper pump alignment and balanced operation
B. Cavitation caused by insufficient suction conditions
C. Excessive refrigerant charge in the compressor
D. Increased boiler water alkalinity
Answer: B
Cavitation occurs when vapor bubbles form because of inadequate suction
pressure and collapse inside the pump, causing vibration, noise, reduced
flow, and possible impeller damage.
4. In a steam heating system, a steam trap is installed primarily to perform
which function?
A. Increase steam pressure in the piping system
B. Remove condensate and prevent unnecessary steam loss
C. Cool boiler feedwater below operating temperature
D. Increase electrical output from generators
Answer: B
, Steam traps remove condensed water from steam systems while
preventing live steam from escaping. Proper trap operation improves
system efficiency and prevents water hammer.
5. A hospital chiller compressor repeatedly trips on high head pressure.
Which operating condition should the stationary engineer investigate first?
A. Condenser water flow and condenser cleanliness
B. Boiler chemical concentration
C. Steam trap discharge temperature
D. Generator battery voltage
Answer: A
High head pressure is commonly caused by poor heat rejection, such as
restricted condenser water flow, dirty condenser tubes, or inadequate
cooling airflow.
6. A boiler operator performs a daily blowdown procedure. What is the
primary purpose of boiler blowdown?
A. Increase the steam temperature above design limits
B. Remove concentrated dissolved solids and impurities from boiler water
C. Add oxygen into the boiler system
D. Increase burner fuel pressure
Answer: B
Engineer Exam Practice Questions And
Correct Answers (Verified Answers) Plus
Rationale 2026 Q&A| Instant Download
1. NYC Health + Hospitals Stationary Engineer Examination is a civil
service title examination. The exam focuses on the knowledge
required to operate and maintain hospital central plants, including
high-pressure boilers, steam distribution systems, refrigeration
equipment, chillers, pumps, generators, HVAC systems, safety controls,
and mechanical/electrical systems. NYC Health + Hospitals uses the
civil service system for many non-managerial positions, and Stationary
Engineer (NYC H+H) is listed as a DCAS examination title.
I will prepare the practice examination in the requested format.
1. A stationary engineer working in a NYC Health + Hospitals central plant
is responsible for maintaining continuous operation of critical building
systems. During a normal shift, the engineer observes that the boiler water
,level is rapidly decreasing while the burner continues firing. Which action
is the safest and most appropriate first response to protect the boiler from
damage and prevent a possible unsafe condition?
A. Increase the firing rate to raise steam pressure faster
B. Shut down the burner, verify the low-water protection system, and
investigate the cause of the water loss
C. Open the main steam valve completely to reduce pressure
D. Add chemicals to the boiler water immediately without checking the
cause
Answer: B
The correct response is to shut down the burner and investigate because
low-water conditions can expose boiler heating surfaces, causing
overheating, tube failure, or a serious boiler accident. Safety devices must
be verified before returning equipment to service.
2. A high-pressure steam boiler in a hospital plant uses a safety valve as a
primary pressure protection device. What is the main purpose of the safety
valve?
A. To control normal steam pressure during routine operation
B. To automatically release steam when pressure exceeds a safe limit
C. To remove dissolved solids from boiler water
D. To regulate combustion air entering the burner
Answer: B
,A safety valve protects the boiler by automatically relieving excess pressure
when operating pressure exceeds the valve setting. It is not used for
normal pressure control or water treatment functions.
3. A stationary engineer notices that a centrifugal pump supplying chilled
water to an air-conditioning system has reduced flow and increased
vibration. Which condition is the most likely cause?
A. Proper pump alignment and balanced operation
B. Cavitation caused by insufficient suction conditions
C. Excessive refrigerant charge in the compressor
D. Increased boiler water alkalinity
Answer: B
Cavitation occurs when vapor bubbles form because of inadequate suction
pressure and collapse inside the pump, causing vibration, noise, reduced
flow, and possible impeller damage.
4. In a steam heating system, a steam trap is installed primarily to perform
which function?
A. Increase steam pressure in the piping system
B. Remove condensate and prevent unnecessary steam loss
C. Cool boiler feedwater below operating temperature
D. Increase electrical output from generators
Answer: B
, Steam traps remove condensed water from steam systems while
preventing live steam from escaping. Proper trap operation improves
system efficiency and prevents water hammer.
5. A hospital chiller compressor repeatedly trips on high head pressure.
Which operating condition should the stationary engineer investigate first?
A. Condenser water flow and condenser cleanliness
B. Boiler chemical concentration
C. Steam trap discharge temperature
D. Generator battery voltage
Answer: A
High head pressure is commonly caused by poor heat rejection, such as
restricted condenser water flow, dirty condenser tubes, or inadequate
cooling airflow.
6. A boiler operator performs a daily blowdown procedure. What is the
primary purpose of boiler blowdown?
A. Increase the steam temperature above design limits
B. Remove concentrated dissolved solids and impurities from boiler water
C. Add oxygen into the boiler system
D. Increase burner fuel pressure
Answer: B
