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FDNY Z51 FINAL EXAM 2024 LATEST UPDATED COMPLETE 500 QUESTIONS WITH DETAILED ANSWERS
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FDNY Z51 FINAL EXAM 2024 LATEST UPDATED COMPLETE 500 QUESTIONS WITH DETAILED ANSWERS
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FDNY Z51 FINAL EXAM 2024 LATESTUPDATED COMPLETE 500 QUESTIONS
WITH DETAILED ANSWERS
The only refrigerant/temperature chart available to a refrigeration engineer lists
the temperature In ﾟC if the chart indicates a Celsius temperature of 4ﾟ this is
equivalent to
39.2ﾟ F° Temp= C° × 1.8 + 32= 4×1.8= 7.2+32=39.2
F° Convert + 32
C°Convert - 32
C° = F(Temp) - 32° ÷1.8
,The use of oil in the refrigeration machine is to
Reduce wear and friction in the compressor parts
Which of the following will connect to the Middle port on a gauge manifold
Vacuum pump
There is a decrease in efficiency of a reciprocating compressor. The most likely is
caused by
Leaking suction valve
The suction and discharge valve of the reciprocating compressor are mounted as
follows
Discharge valve on top of the valve plate and suction valve on the bottom
A high side float is used to maintain
Constant level of refrigerant in the evaporator
, The amount of refrigerant that flows through the orifices of an economizer is
determined by the
Difference between the high side and the low side pressure
the instalation of an inline refrigerant cleaning system is advisable
to remove impurities from the system
a refrigerant engineer verifies that a condenser pump is cavitating of the following
the most likely cause for this condition is:
a faulty cooling tower water level controller
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