NYC Refrigeration License Exam I
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questions with answers |\ |\
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: |\ |\ |\
Lowering the condenser pressure |\ |\ |\
The heat removed from the refrigerant in a condenser is:
|\ |\ |\ |\ |\ |\ |\ |\ |\
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 the containers:
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
Are approved by the US Department of Transportation
|\ |\ |\ |\ |\ |\ |\
Which of the following best describes how the cylinder unloader
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
works?
,Keep the suction valve opened while the compressor is in the
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
return stroke |\
In most semi hermetic compressors, the suction vapor is used to:
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
Cools the motor |\ |\
The amount of refrigerant that flows through the orifices of an
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
economizer is determined by the: |\ |\ |\ |\
Difference between the high side and low side pressure
|\ |\ |\ |\ |\ |\ |\ |\
The installation of an inline refrigerant cleaning system is
|\ |\ |\ |\ |\ |\ |\ |\ |\
advisable:
To remove impurities from the system
|\ |\ |\ |\ |\
The type of refrigerant system that is least likely to leak
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
refrigerant into the building space that are being cooled:
|\ |\ |\ |\ |\ |\ |\ |\
The indirect system
|\ |\
,The suction pressure of a reciprocating compressor is 65 PSIG.
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
The discharge pressure is 120 PSIG. The atmospheric is 14.7 PSI.
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
The compression ratio for the given condition is closest to:
|\ |\ |\ |\ |\ |\ |\ |\ |\
1.69
A superheated vapor is a:
|\ |\ |\ |\
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: |\
A faulty cooling tower water level controller
|\ |\ |\ |\ |\ |\
A centrifugal water pump is known as a lift pump when the:
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
The water supply to the pump suction inlet is below the pump
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
level
, A TXV is used to maintain constant:
|\ |\ |\ |\ |\ |\
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?
|\ |\
Yes, this temperature is too high for human comfort purposes
|\ |\ |\ |\ |\ |\ |\ |\ |\
The packing gland of a centrifugal pump serves to:
|\ |\ |\ |\ |\ |\ |\ |\
The drip part of the packing gland gives evidence that there is
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
water in the pump
|\ |\ |\
Capacity control of a reciprocating hermetic compressor is
|\ |\ |\ |\ |\ |\ |\ |\
typically achieved through
|\ |\
Operation of the hot gas bypass valve
|\ |\ |\ |\ |\ |\
|\ |\ |\ |\ |\
questions with answers |\ |\
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: |\ |\ |\
Lowering the condenser pressure |\ |\ |\
The heat removed from the refrigerant in a condenser is:
|\ |\ |\ |\ |\ |\ |\ |\ |\
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 the containers:
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
Are approved by the US Department of Transportation
|\ |\ |\ |\ |\ |\ |\
Which of the following best describes how the cylinder unloader
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
works?
,Keep the suction valve opened while the compressor is in the
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
return stroke |\
In most semi hermetic compressors, the suction vapor is used to:
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
Cools the motor |\ |\
The amount of refrigerant that flows through the orifices of an
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
economizer is determined by the: |\ |\ |\ |\
Difference between the high side and low side pressure
|\ |\ |\ |\ |\ |\ |\ |\
The installation of an inline refrigerant cleaning system is
|\ |\ |\ |\ |\ |\ |\ |\ |\
advisable:
To remove impurities from the system
|\ |\ |\ |\ |\
The type of refrigerant system that is least likely to leak
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
refrigerant into the building space that are being cooled:
|\ |\ |\ |\ |\ |\ |\ |\
The indirect system
|\ |\
,The suction pressure of a reciprocating compressor is 65 PSIG.
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
The discharge pressure is 120 PSIG. The atmospheric is 14.7 PSI.
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
The compression ratio for the given condition is closest to:
|\ |\ |\ |\ |\ |\ |\ |\ |\
1.69
A superheated vapor is a:
|\ |\ |\ |\
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: |\
A faulty cooling tower water level controller
|\ |\ |\ |\ |\ |\
A centrifugal water pump is known as a lift pump when the:
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
The water supply to the pump suction inlet is below the pump
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
level
, A TXV is used to maintain constant:
|\ |\ |\ |\ |\ |\
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?
|\ |\
Yes, this temperature is too high for human comfort purposes
|\ |\ |\ |\ |\ |\ |\ |\ |\
The packing gland of a centrifugal pump serves to:
|\ |\ |\ |\ |\ |\ |\ |\
The drip part of the packing gland gives evidence that there is
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
water in the pump
|\ |\ |\
Capacity control of a reciprocating hermetic compressor is
|\ |\ |\ |\ |\ |\ |\ |\
typically achieved through
|\ |\
Operation of the hot gas bypass valve
|\ |\ |\ |\ |\ |\
