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FDNY Z-51 EXAM NEWEST 2025/2026 NEWEST ACTUAL
EXAM WITH COMPLETE QUESTIONS AND VERIFIED
ANSWERS |ALREADY GRADED A+|
You are performing hot work near a sprinkler head what can you
do to prevent the fire alarm system from going off - ANSWER-Put
a non combustible barrier to protect the sprinkler
What type of sprinkler heads need inspecting - ANSWER-
Automatic
Filter driers remove - ANSWER-Moisture and particles
You are the engineer running a 2000 t steam driven Turbine
centrifugal rug fridge eration system supplying chilled water to a
college campus with multiple buildings you are supplying 46ﾟ
chilled water all the buildings are satisfied except one building
what should you do - ANSWER-Put on a additional chilled water
pump online
If 29.92 HG = 14.7 PSIA then 26" HG converts to what in PSIA -
ANSWER-12.77 (.491 is constant for HG)
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What is the device used to measure the speed of a turbine -
ANSWER-Tachometer
The charge in TEV sensing bulb is - ANSWER-Similar to the
refrigerant in this system
The cooling medium for a cooling tower is - ANSWER-Air
A technician has been asked to estimate the cost of operating a 5
horsepower motor because the plant is billed by energy
consumed as kilowatt hours the technician will calculate the
conversion the equivalent in energy of a 5 horse power motor
operating for 9 hours and kilowatt hours is closest to - ANSWER-
33.6 (one horsepower equals. 746)
The only refrigerant/temperature chart available to refrigerate
engineer list the temperature in ﾟC if the chart indicates a Celsius
temperature of 5ﾟ the equivalent In Fahrenheit is - ANSWER-41ﾟ
(1.8 × 5)+ 32 equals)
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How do you start a centrifugal chiller - ANSWER-Start the chilled
water pump then start the condenser water pump check oil start
cooling tower start compressor
A circuit breaker has a similar function as what - ANSWER-A fuse
A standpipe system will be out of service for 2 days how long
should there be fire watch - ANSWER-The entire time the
standpipe is out of service
In a building with a multi zone How does each zone get supplied
with water - ANSWER-Each zone will have its own automatic
water supply
Which service valve should be Install to isolate dual pressure
relief valve while keeping the system in service - ANSWER-3 way
valve
FDNY Z-51 EXAM NEWEST 2025/2026 NEWEST ACTUAL
EXAM WITH COMPLETE QUESTIONS AND VERIFIED
ANSWERS |ALREADY GRADED A+|
You are performing hot work near a sprinkler head what can you
do to prevent the fire alarm system from going off - ANSWER-Put
a non combustible barrier to protect the sprinkler
What type of sprinkler heads need inspecting - ANSWER-
Automatic
Filter driers remove - ANSWER-Moisture and particles
You are the engineer running a 2000 t steam driven Turbine
centrifugal rug fridge eration system supplying chilled water to a
college campus with multiple buildings you are supplying 46ﾟ
chilled water all the buildings are satisfied except one building
what should you do - ANSWER-Put on a additional chilled water
pump online
If 29.92 HG = 14.7 PSIA then 26" HG converts to what in PSIA -
ANSWER-12.77 (.491 is constant for HG)
, Page |2
What is the device used to measure the speed of a turbine -
ANSWER-Tachometer
The charge in TEV sensing bulb is - ANSWER-Similar to the
refrigerant in this system
The cooling medium for a cooling tower is - ANSWER-Air
A technician has been asked to estimate the cost of operating a 5
horsepower motor because the plant is billed by energy
consumed as kilowatt hours the technician will calculate the
conversion the equivalent in energy of a 5 horse power motor
operating for 9 hours and kilowatt hours is closest to - ANSWER-
33.6 (one horsepower equals. 746)
The only refrigerant/temperature chart available to refrigerate
engineer list the temperature in ﾟC if the chart indicates a Celsius
temperature of 5ﾟ the equivalent In Fahrenheit is - ANSWER-41ﾟ
(1.8 × 5)+ 32 equals)
, Page |3
How do you start a centrifugal chiller - ANSWER-Start the chilled
water pump then start the condenser water pump check oil start
cooling tower start compressor
A circuit breaker has a similar function as what - ANSWER-A fuse
A standpipe system will be out of service for 2 days how long
should there be fire watch - ANSWER-The entire time the
standpipe is out of service
In a building with a multi zone How does each zone get supplied
with water - ANSWER-Each zone will have its own automatic
water supply
Which service valve should be Install to isolate dual pressure
relief valve while keeping the system in service - ANSWER-3 way
valve
