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FDNY Z51 QUESTIONS AND ANSWERS
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FDNY Z51 QUESTIONS AND ANSWERS
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FDNY Z51 QUESTIONS AND ANSWERSOf the following, the statement that most accurately characterize a hermetic compressor
is that it: - Answers-Will have both the compressor and motor enclosed is gas tight
housing
In the picture the valve is in what position (45 degree angle to the left) - Answers-The
valve is crack open
What is the order of components on the liquid line of a reciprocating system from the
condenser to the TEV? - Answers-King valve, filter drier, solenoid valve, sight glass
A high-side float valve is used to maintain: - Answers-Constant level of refrigerant in the
evaporator
Picture of pump: - Answers-Ninety degree reducing elbow, pump suction, pump casing,
pump discharge, check valve
Picture of compressor: - Answers-Oil charging port allows for the addition and removal
of oil from the compressor
A refrigerant engineer verifies that a chilled water pump is cavitating. of the following the
most likely cause for this condition is: - Answers-Water leaks through the mechanical
seals
There is a decrease in the efficiency of a reciprocating compressor. this most likely
caused by: - Answers-Leaking suction valve
The suction and discharge valve of the reciprocating compressor are mounted as
follows: - Answers-Discharge valves on top of the valve plate and suction valve below
You are the engineer running a 2000-ton (steam-driven turbine) centrifugal refrigeration
system, a refrigeration system supplies chilled water to a college campus with multiple
buildings. while making your rounds you notice that the discharge pressure of your
condenser water pumps is significantly lower than normal. which of the following action
would you avoid taking: - Answers-Put on an additional surface condenser pump and
lower the chilled water set point
A water pump is discharge against head 92 feet of water, this is approximately to a
pressure of: - Answers-40 psi
Which of the following will connect to the middle port on a gauge manifold? - Answers-
Vacuum pump
The most important reason for installing a muffler in a reciprocating refrigerant machine
is: - Answers-To contain the compressor pulsation noise
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