NYC High Pressure Plant Tender Exam
Practice Test Questions and Correct
Answers (Verified Answers) Plus
Rationales 2026
1. What is the primary function of a high-pressure boiler in a plant
facility?
A. To circulate chilled water
B. To produce high-pressure steam for heating or power
C. To filter feedwater
D. To compress air
Answer: B. To produce high-pressure steam for heating or power
Rationale: A high-pressure boiler is designed to generate steam at
pressures exceeding 15 psi for commercial and industrial applications.
The steam is used for heating, process operations, or driving turbines
for power generation.
, 2. According to NYC regulations, a high-pressure boiler operates at
pressures above:
A. 10 psi
B. 15 psi
C. 50 psi
D. 100 psi
Answer: B. 15 psi
Rationale: In New York City, boilers operating above 15 psi are
classified as high-pressure boilers and require licensed supervision.
3. What device prevents boiler pressure from exceeding safe limits?
A. Aquastat
B. Pressure gauge
C. Safety valve
D. Sight glass
Answer: C. Safety valve
Rationale: The safety valve automatically opens when pressure
exceeds a preset limit, releasing steam to prevent explosion or
equipment damage.
, 4. The normal water level in a boiler is indicated by the:
A. Pressure control
B. Feedwater pump
C. Sight glass
D. Blowdown valve
Answer: C. Sight glass
Rationale: The sight glass provides a visible indication of water level,
ensuring safe boiler operation and preventing low-water conditions.
5. Low-water cutoff devices are installed to:
A. Increase steam production
B. Shut down the burner when water level drops too low
C. Increase fuel supply
D. Reduce stack temperature
Answer: B. Shut down the burner when water level drops too low
Rationale: A low-water cutoff prevents overheating and potential
boiler failure by stopping fuel combustion when unsafe water levels
occur.
, 6. The purpose of boiler blowdown is to:
A. Increase pressure
B. Remove sediment and dissolved solids
C. Raise water level
D. Reduce fuel consumption
Answer: B. Remove sediment and dissolved solids
Rationale: Blowdown removes impurities that accumulate in the
boiler, preventing scale formation and maintaining efficiency.
7. A sudden drop in boiler water level may indicate:
A. Excess feedwater
B. Pump overcapacity
C. Tube rupture or leak
D. Proper operation
Answer: C. Tube rupture or leak
Rationale: A rapid loss of water can signal a serious mechanical failure
requiring immediate shutdown and inspection.
8. The device that controls burner operation based on steam
pressure is the:
Practice Test Questions and Correct
Answers (Verified Answers) Plus
Rationales 2026
1. What is the primary function of a high-pressure boiler in a plant
facility?
A. To circulate chilled water
B. To produce high-pressure steam for heating or power
C. To filter feedwater
D. To compress air
Answer: B. To produce high-pressure steam for heating or power
Rationale: A high-pressure boiler is designed to generate steam at
pressures exceeding 15 psi for commercial and industrial applications.
The steam is used for heating, process operations, or driving turbines
for power generation.
, 2. According to NYC regulations, a high-pressure boiler operates at
pressures above:
A. 10 psi
B. 15 psi
C. 50 psi
D. 100 psi
Answer: B. 15 psi
Rationale: In New York City, boilers operating above 15 psi are
classified as high-pressure boilers and require licensed supervision.
3. What device prevents boiler pressure from exceeding safe limits?
A. Aquastat
B. Pressure gauge
C. Safety valve
D. Sight glass
Answer: C. Safety valve
Rationale: The safety valve automatically opens when pressure
exceeds a preset limit, releasing steam to prevent explosion or
equipment damage.
, 4. The normal water level in a boiler is indicated by the:
A. Pressure control
B. Feedwater pump
C. Sight glass
D. Blowdown valve
Answer: C. Sight glass
Rationale: The sight glass provides a visible indication of water level,
ensuring safe boiler operation and preventing low-water conditions.
5. Low-water cutoff devices are installed to:
A. Increase steam production
B. Shut down the burner when water level drops too low
C. Increase fuel supply
D. Reduce stack temperature
Answer: B. Shut down the burner when water level drops too low
Rationale: A low-water cutoff prevents overheating and potential
boiler failure by stopping fuel combustion when unsafe water levels
occur.
, 6. The purpose of boiler blowdown is to:
A. Increase pressure
B. Remove sediment and dissolved solids
C. Raise water level
D. Reduce fuel consumption
Answer: B. Remove sediment and dissolved solids
Rationale: Blowdown removes impurities that accumulate in the
boiler, preventing scale formation and maintaining efficiency.
7. A sudden drop in boiler water level may indicate:
A. Excess feedwater
B. Pump overcapacity
C. Tube rupture or leak
D. Proper operation
Answer: C. Tube rupture or leak
Rationale: A rapid loss of water can signal a serious mechanical failure
requiring immediate shutdown and inspection.
8. The device that controls burner operation based on steam
pressure is the:
