58-Cooling tower water requires the addition of chemical additives in order to. - ANSWER Reduce the formation of scale and algae
59-In the picture below describe equipment function - ANSWER Remove non condensables from condenser
60-The Viscosity of lubrication oil is described by a number. A ...
NYC Refrigeration Exam Questions 58-
100 100% ACCURATE
58-Cooling tower water requires the addition of chemical additives in order to. - ANSWER Reduce the
formation of scale and algae
59-In the picture below describe equipment function - ANSWER Remove non condensables from
condenser
60-The Viscosity of lubrication oil is described by a number. A low viscosity number describes an oil that -
ANSWER Flows easily
61- The most likely reason for a refrigeration engineer to use a psychomotor is to measure - ANSWER
Relative humidity level of the atmosphere
62- The most important reason to use at least 2 compressors in a cascade system is to: - ANSWER Avoid a
very high compression ratio for each compressor.
63-The suction service valve of a reciprocating compressor is front seated and the compressor run until
low pressure cut-out shut the compressor off. When the machine is stopped, the refrigeration engineer
notices that suction pressure increases rapidly. The most cause of this pressure rise: - ANSWER
Malfunction of a compressor valve
64- Regarding of a steam turbine, why is it advisable to keep moisture in the inlet low as possible -
ANSWER Keeps turbine blades to a minimum
65-According to the attached material safety data sheet (MSDS) R-134a is? - ANSWER Clear odorless
liquid vapor
66-Under normal condition, the refrigerant enters the compressor as a: - ANSWER Low press
Superheated vapor and leaves as a High press vapor .
, 67-While operating the R-22 single acting compressor system, the refrigeration engineer noticed oil
foaming in crankcase. This condition most likely, would have been caused by. - ANSWER Sudden drop in
the crankcase pressure
78-In relation to the suction press of a compressor, the reading on the oil pressure gauge should read in
the range, closer to: - ANSWER 15 to 30 PSI higher
79- Non-condesable gases like air, oil vapor, or nitrogen travel through a refrigerant system with the
refrigerant they usually accumulate in the: - ANSWER Condenser
80-The advantage of a forced draft cooling tower over a natural draft cooling tower is? - ANSWER Smaller
tower size
81-The sole refrigeration engineer on duty in a building is permitted to leave the refrigeration system,
when it is in operation, only when - ANSWER Relieved by another licensed refrigeration engineer.
82- A system controlled by a TXV show high discharge pressure and high normal subcooling. The cause is
most probably at: - ANSWER Refrigerant overcharge
83-Which of the following statements are correct - ANSWER 2.5 gallons of water weighs 20.8 pounds
(8.3 gallons=1 lb)
84-Liquid level gauge glasses (except the bulls eye) are generally equipped with - ANSWER Automatic
shut off valves only
85-Copper and aluminum are frequently used for condenser tubes in refrigeration system. These metals
are used because of there: - ANSWER High heat transfer coefficient
86- Assume that a refrigeration engineer has a choice of four valves select from. Which of the following
is the most effective type of valve to control pressure. - ANSWER Plug valve
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