1|Page
NYC Thermostat Repairer (CUNY) Exam Actual Test||
Verified Questions and Correct Answers With
Rationales LATEST THIS YEAR.pdf||NEWEST EXAM!!!
The type of refrigerant system that is least likely to leak
refrigerant into the building space that are being cooled -
Answer-The indirect System
The suction pressure of a reciprocating compressor is 65
psig. the discharge pressure of this compressor is 120
psig. the atmospheric is 14.7 psi. The compression ratio
for the given condition is closest to: - Answer-1.69
A superheated Vapor is a: - Answer-Dry vapor above the
saturation temperature
A refrigerant engineer verifies that a condenser water
pump is cavitating. of the following the most likely cause
for this condition is: - Answer-A faulty cooling tower water
level controller
,2|Page
A centriugal water pump is known as a lift pump when the:
- Answer-the water supply to the pump suction inlet is
below the pump level
A TEV is used to maintain constant: - Answer-Evaporator
Superheat
The chilled water supply to the building is 55F. If the chiller
is being used for human comfort, should you be
concerned about this, and why? - Answer-Yes,this
temperature is too high for human comfort purpose
The packing gland of a centrifugal pump serves to: -
Answer-The drip part of the packing gland gives the
evidence that there is water in the pump
Capacity control of a reciprocating hermetic compressor is
typically achieved through - Answer-operation of the hot
gas bypass valve
The most important reason to sub-cool the refrigerant in
the condenser is to ensure that: - Answer-A pure liquid
refrigerant will enter the metering device
,3|Page
A refrigeration engineer is logging reading from a
reciprocating system. Compressor discharge temperature
have dropped significantly and the suction line pressure is
high. which of the following that may causing this set of
condition. - Answer-An expansion valve that is open to
wide
The efficiency of the refrigerant cycle is affected by the
operation of the condenser. of the following, a more
efficient centrifugal compressor operation results from: -
Answer-Lowering the condensing pressure
The heat removed from the refrigerant in a condenser is: -
Answer-Sensible and Latent Heat
The refrigerant unit that you have been assigned to is
being taken out of service for a major repair. You have
been assigned to withdraw refrigerant for storage in
suitable containers. According to the New York City fire
code, You must ensure that the containers: - Answer-Are
approved by the US Department of Transportation
, 4|Page
Which of the following best describes how the cylinder
unloader work? - Answer-Keep in the suction Valve
opened while the compressor is in the return stroke
In most semi Hermetic compressors,the suction vapor is
used to: - Answer-Cools the motor
The amount of refrigerant that flows through the orifices of
a economizer is determined by the: - Answer-Difference
between the high side and low side pressure
The installation of an inline refrigerant cleaning system is
advisable - Answer-To remove impurities from the system
A low side float valve is used to maintain: - Answer-The
level of the refrigerant in the evaporator
Regarding fire safety, which ASHRAE refrigerant safety
classification indicates no flammability and lower toxicity? -
Answer-A1
NYC Thermostat Repairer (CUNY) Exam Actual Test||
Verified Questions and Correct Answers With
Rationales LATEST THIS YEAR.pdf||NEWEST EXAM!!!
The type of refrigerant system that is least likely to leak
refrigerant into the building space that are being cooled -
Answer-The indirect System
The suction pressure of a reciprocating compressor is 65
psig. the discharge pressure of this compressor is 120
psig. the atmospheric is 14.7 psi. The compression ratio
for the given condition is closest to: - Answer-1.69
A superheated Vapor is a: - Answer-Dry vapor above the
saturation temperature
A refrigerant engineer verifies that a condenser water
pump is cavitating. of the following the most likely cause
for this condition is: - Answer-A faulty cooling tower water
level controller
,2|Page
A centriugal water pump is known as a lift pump when the:
- Answer-the water supply to the pump suction inlet is
below the pump level
A TEV is used to maintain constant: - Answer-Evaporator
Superheat
The chilled water supply to the building is 55F. If the chiller
is being used for human comfort, should you be
concerned about this, and why? - Answer-Yes,this
temperature is too high for human comfort purpose
The packing gland of a centrifugal pump serves to: -
Answer-The drip part of the packing gland gives the
evidence that there is water in the pump
Capacity control of a reciprocating hermetic compressor is
typically achieved through - Answer-operation of the hot
gas bypass valve
The most important reason to sub-cool the refrigerant in
the condenser is to ensure that: - Answer-A pure liquid
refrigerant will enter the metering device
,3|Page
A refrigeration engineer is logging reading from a
reciprocating system. Compressor discharge temperature
have dropped significantly and the suction line pressure is
high. which of the following that may causing this set of
condition. - Answer-An expansion valve that is open to
wide
The efficiency of the refrigerant cycle is affected by the
operation of the condenser. of the following, a more
efficient centrifugal compressor operation results from: -
Answer-Lowering the condensing pressure
The heat removed from the refrigerant in a condenser is: -
Answer-Sensible and Latent Heat
The refrigerant unit that you have been assigned to is
being taken out of service for a major repair. You have
been assigned to withdraw refrigerant for storage in
suitable containers. According to the New York City fire
code, You must ensure that the containers: - Answer-Are
approved by the US Department of Transportation
, 4|Page
Which of the following best describes how the cylinder
unloader work? - Answer-Keep in the suction Valve
opened while the compressor is in the return stroke
In most semi Hermetic compressors,the suction vapor is
used to: - Answer-Cools the motor
The amount of refrigerant that flows through the orifices of
a economizer is determined by the: - Answer-Difference
between the high side and low side pressure
The installation of an inline refrigerant cleaning system is
advisable - Answer-To remove impurities from the system
A low side float valve is used to maintain: - Answer-The
level of the refrigerant in the evaporator
Regarding fire safety, which ASHRAE refrigerant safety
classification indicates no flammability and lower toxicity? -
Answer-A1
