NYC Refrigeration Exam Questions
Exam Questions and Answers
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
68-Assume the engineer is able to observe refrigerant water and oil all together. The
fluids would settle in the container top to bottom : - Answer-Oil, water, refrigerant
69-What is the function of a vacuum breaker in a steam turbine? - Answer-To achieve a
faster coast down cycle
70-An equalizer line on a TXV is used to: - Answer-Compensate for the pressure drop
across the Evap coil.
Exam Questions and Answers
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
68-Assume the engineer is able to observe refrigerant water and oil all together. The
fluids would settle in the container top to bottom : - Answer-Oil, water, refrigerant
69-What is the function of a vacuum breaker in a steam turbine? - Answer-To achieve a
faster coast down cycle
70-An equalizer line on a TXV is used to: - Answer-Compensate for the pressure drop
across the Evap coil.
