4/23/26, 1:55 PM Q-01 FDNY Exam Questions and Answers (Verified Answers) Updated (Actual Exam) 2025\2026 LATEST VERSION!! Flashcards | …
Q-01 FDNY Exam Questions and Answers
(Verified Answers) Updated (Actual Exam)
2025\2026 LATEST VERSION!!
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Terms in this set (196)
Rupture members, when used in 20%
parallel with a relief valve, are not to
exceed _____% above designed
working pressure
Butterfly valve: where can it be Can be used on the inlet and outlet of a water
used? pump
What electrical motor protection The thermal protector
device automatically resets itself?
746 watts equals how many kilowatt .746 kilowatt hours
hours?
What position is the liquid line Back-seated
service valve normally in?
In an operating evaporator, oil stays Carbon dioxide, R-744
on top of which refrigerant?
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,4/23/26, 1:55 PM Q-01 FDNY Exam Questions and Answers (Verified Answers) Updated (Actual Exam) 2025\2026 LATEST VERSION!! Flashcards | …
At what pressure does the relief 300 psi
valve blow on a high pressure
machine?
What would indicate a restriction Frost immediately after the restriction
(such as dirt or scale) in the liquid
line?
What does solubility mean? The ability of a refrigerant to mix with other
substances
Charging Vapor —In a compression Suction side of the compressor at the Suction
system, where do you charge the Service Valve
vapor?
When comparing a brine with s PH 100 times greater (ex. PH 8 to PH 9 is 10 times
of 8 to one with a PH of 10, its greater)
alkalinity is:
In an efficiently operating induced Dry bulb and wet bulb temperature
draft cooling tower, the leaving
water is between:
To produce the desired evaporator Head pressure as low as possible & suction
temperature, the power input is pressure as high as needed
reduced by keeping head pressure...
The accumulator is usually between Compressor and evaporator
the...
An oiling system in a large Reservoir, pump and distribution lines
centrifugal system should consist of
at least...
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,4/23/26, 1:55 PM Q-01 FDNY Exam Questions and Answers (Verified Answers) Updated (Actual Exam) 2025\2026 LATEST VERSION!! Flashcards | …
In an evaporator that chills brine, the Boiling of low pressure liquid
greatest cooling effect on the brine
results from the...
The flow of weak liquor to the B) throttling device
absorber is controlled by
A) gas pressure
B) throttling device
C) float valve
D) pressure of the strong liquor
pump
The best way of detecting ammonia C) Nessler reagent
brine is by using
A) CO2 gas
B) potassium of lime
C) Nessler reagent
D) carbonate of soda
The best time to purge an ammonia C) during operation
plant with 250 lbs. of ammonia is
A) during shut-down, because you
will lose ammonia
B) while charging the plant
C) during operation
D) none of the above
What will make the strong liquor in B) A decrease in evaporator load
the absorber decrease?
A) expansion valve open too much
B) A decrease in evaporator load
C) An increase in evaporator load
D) Too much steam on the generator
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, 4/23/26, 1:55 PM Q-01 FDNY Exam Questions and Answers (Verified Answers) Updated (Actual Exam) 2025\2026 LATEST VERSION!! Flashcards | …
Which of the following statements is D) A rupture member automatically ruptures at a
incorrect? predetermined temperature
A) A service valve is a key-operated
shut-off valve used during shipment,
installation and repairs
B) Brine is a liquid cooled by
refrigeration and used for the
transmission of heat
C) A fusible plug has a set-
temperature fusible member to
relieve pressure
D) A rupture member automatically
ruptures at a predetermined
temperature
Oil in a refrigerant should D) not contain moisture
A) have a high pour point
B) have a low flash point
C) have a high viscosity
D) not contain moisture
In an NH3 dry expansion evaporator A) 7 to 10° F
with TXV and bulb clamped properly
on the outlet of the evaporator, the
superheat is
A) 7 to 10° F
B) 5 to 9° F
C) 20 to 30° F
D) 1 to 2° F
The setting of a fusible plug is A) 280° F
A) 280° F
B) 300° F
C) 380° F
D) 300 psig.
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Q-01 FDNY Exam Questions and Answers
(Verified Answers) Updated (Actual Exam)
2025\2026 LATEST VERSION!!
Save Groups
Terms in this set (196)
Rupture members, when used in 20%
parallel with a relief valve, are not to
exceed _____% above designed
working pressure
Butterfly valve: where can it be Can be used on the inlet and outlet of a water
used? pump
What electrical motor protection The thermal protector
device automatically resets itself?
746 watts equals how many kilowatt .746 kilowatt hours
hours?
What position is the liquid line Back-seated
service valve normally in?
In an operating evaporator, oil stays Carbon dioxide, R-744
on top of which refrigerant?
https://quizlet.com/1171720903/q-01-fdny-exam-questions-and-answers-verified-answers-updated-actual-exam-20252026-latest-version-flash-cards/… 1/43
,4/23/26, 1:55 PM Q-01 FDNY Exam Questions and Answers (Verified Answers) Updated (Actual Exam) 2025\2026 LATEST VERSION!! Flashcards | …
At what pressure does the relief 300 psi
valve blow on a high pressure
machine?
What would indicate a restriction Frost immediately after the restriction
(such as dirt or scale) in the liquid
line?
What does solubility mean? The ability of a refrigerant to mix with other
substances
Charging Vapor —In a compression Suction side of the compressor at the Suction
system, where do you charge the Service Valve
vapor?
When comparing a brine with s PH 100 times greater (ex. PH 8 to PH 9 is 10 times
of 8 to one with a PH of 10, its greater)
alkalinity is:
In an efficiently operating induced Dry bulb and wet bulb temperature
draft cooling tower, the leaving
water is between:
To produce the desired evaporator Head pressure as low as possible & suction
temperature, the power input is pressure as high as needed
reduced by keeping head pressure...
The accumulator is usually between Compressor and evaporator
the...
An oiling system in a large Reservoir, pump and distribution lines
centrifugal system should consist of
at least...
https://quizlet.com/1171720903/q-01-fdny-exam-questions-and-answers-verified-answers-updated-actual-exam-20252026-latest-version-flash-cards/… 2/43
,4/23/26, 1:55 PM Q-01 FDNY Exam Questions and Answers (Verified Answers) Updated (Actual Exam) 2025\2026 LATEST VERSION!! Flashcards | …
In an evaporator that chills brine, the Boiling of low pressure liquid
greatest cooling effect on the brine
results from the...
The flow of weak liquor to the B) throttling device
absorber is controlled by
A) gas pressure
B) throttling device
C) float valve
D) pressure of the strong liquor
pump
The best way of detecting ammonia C) Nessler reagent
brine is by using
A) CO2 gas
B) potassium of lime
C) Nessler reagent
D) carbonate of soda
The best time to purge an ammonia C) during operation
plant with 250 lbs. of ammonia is
A) during shut-down, because you
will lose ammonia
B) while charging the plant
C) during operation
D) none of the above
What will make the strong liquor in B) A decrease in evaporator load
the absorber decrease?
A) expansion valve open too much
B) A decrease in evaporator load
C) An increase in evaporator load
D) Too much steam on the generator
https://quizlet.com/1171720903/q-01-fdny-exam-questions-and-answers-verified-answers-updated-actual-exam-20252026-latest-version-flash-cards/… 3/43
, 4/23/26, 1:55 PM Q-01 FDNY Exam Questions and Answers (Verified Answers) Updated (Actual Exam) 2025\2026 LATEST VERSION!! Flashcards | …
Which of the following statements is D) A rupture member automatically ruptures at a
incorrect? predetermined temperature
A) A service valve is a key-operated
shut-off valve used during shipment,
installation and repairs
B) Brine is a liquid cooled by
refrigeration and used for the
transmission of heat
C) A fusible plug has a set-
temperature fusible member to
relieve pressure
D) A rupture member automatically
ruptures at a predetermined
temperature
Oil in a refrigerant should D) not contain moisture
A) have a high pour point
B) have a low flash point
C) have a high viscosity
D) not contain moisture
In an NH3 dry expansion evaporator A) 7 to 10° F
with TXV and bulb clamped properly
on the outlet of the evaporator, the
superheat is
A) 7 to 10° F
B) 5 to 9° F
C) 20 to 30° F
D) 1 to 2° F
The setting of a fusible plug is A) 280° F
A) 280° F
B) 300° F
C) 380° F
D) 300 psig.
https://quizlet.com/1171720903/q-01-fdny-exam-questions-and-answers-verified-answers-updated-actual-exam-20252026-latest-version-flash-cards/… 4/43
