FDNY Q01/Q99 Written Exam | Most Recent Exam 2026
/2027Actual Complete Real Exam Questions And
Correct Answers (Verified Answers) Already Graded
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Rupture members, when used in parallel with a relief
valve, are not to exceed _____% above designed working
pressure - ANSWER--20%
What position is the liquid line service valve normally in? -
ANSWER--Back-seated
,In an operating evaporator, oil stays on top of which
refrigerant? - ANSWER--Carbon dioxide, R-744
At what pressure does the relief valve blow on a high
pressure machine? - ANSWER--300 psi
What would indicate a restriction (such as dirt or scale) in
the liquid line? - ANSWER--Frost immediately after the
restriction
Charging Vapor —In a compression system, where do you
charge the vapor? - ANSWER--Suction side of the
compressor at the Suction Service Valve
,What does solubility mean? - ANSWER--The ability of a
refrigerant to mix with other substances
When comparing a brine with s PH of 8 to one with a PH
of 10, its alkalinity is: - ANSWER--100 times greater (ex.
PH 8 to PH 9 is 10 times greater)
In an efficiently operating induced draft cooling tower, the
leaving water is between: - ANSWER--Dry bulb and wet
bulb temperature
To produce the desired evaporator temperature, the power
input is reduced by keeping head pressure... - ANSWER--
Head pressure as low as possible & suction pressure as
high as needed
, The accumulator is usually between the... - ANSWER--
Compressor and evaporator
An oiling system in a large centrifugal system should
consist of at least... - ANSWER--Reservoir, pump and
distribution lines
In an evaporator that chills brine, the greatest cooling
effect on the brine results from the... - ANSWER--Boiling of
low pressure liquid
The flow of weak liquor to the absorber is controlled by
A) gas pressure
/2027Actual Complete Real Exam Questions And
Correct Answers (Verified Answers) Already Graded
A+!!!|Guaranteed Success!! Newest Exam | Just
Released!!!!!!
Rupture members, when used in parallel with a relief
valve, are not to exceed _____% above designed working
pressure - ANSWER--20%
What position is the liquid line service valve normally in? -
ANSWER--Back-seated
,In an operating evaporator, oil stays on top of which
refrigerant? - ANSWER--Carbon dioxide, R-744
At what pressure does the relief valve blow on a high
pressure machine? - ANSWER--300 psi
What would indicate a restriction (such as dirt or scale) in
the liquid line? - ANSWER--Frost immediately after the
restriction
Charging Vapor —In a compression system, where do you
charge the vapor? - ANSWER--Suction side of the
compressor at the Suction Service Valve
,What does solubility mean? - ANSWER--The ability of a
refrigerant to mix with other substances
When comparing a brine with s PH of 8 to one with a PH
of 10, its alkalinity is: - ANSWER--100 times greater (ex.
PH 8 to PH 9 is 10 times greater)
In an efficiently operating induced draft cooling tower, the
leaving water is between: - ANSWER--Dry bulb and wet
bulb temperature
To produce the desired evaporator temperature, the power
input is reduced by keeping head pressure... - ANSWER--
Head pressure as low as possible & suction pressure as
high as needed
, The accumulator is usually between the... - ANSWER--
Compressor and evaporator
An oiling system in a large centrifugal system should
consist of at least... - ANSWER--Reservoir, pump and
distribution lines
In an evaporator that chills brine, the greatest cooling
effect on the brine results from the... - ANSWER--Boiling of
low pressure liquid
The flow of weak liquor to the absorber is controlled by
A) gas pressure
