Written Exam FDNY RMO 1 ACTUAL UPDATED Questions and CORRECT
Answers
C
Terms in this set (223)
The efficiency of the refrigerant cycle is affected by the Lowering the condensing pressure
operation of the condenser. of the following, a more
efficient centrifugal compressor operation results from:
The heat removed from the refrigerant in a condenser is: Sensible and Latent Heat
The refrigerant unit that you have been assigned to is Are approved by the US Department of Transportation
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:
Which of the following best describes how the cylinder Keep in the suction Valve opened while the compressor is in the return stroke
unloader work?
In most semi Hermetic compressors,the suction vapor is Cools the motor
used to:
The amount of refrigerant that flows through the orifices Difference between the high side and low side pressure
of a economizer is determined by the:
The installation of an inline refrigerant cleaning system is To remove impurities from the system
advisable
The type of refrigerant system that is least likely to leak The indirect System
refrigerant into the building space that are being cooled
The suction pressure of a reciprocating compressor is 65 1.69
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:
A superheated Vapor is a: Dry vapor above the saturation temperature
A refrigerant engineer verifies that a condenser water A faulty cooling tower water level controller
pump is cavitating. of the following the most likely cause
for this condition is:
A centriugal water pump is known as a lift pump when the water supply to the pump suction inlet is below the pump level
the:
, A TEV is used to maintain constant: Evaporator Superheat
The chilled water supply to the building is 55F. If the Yes,this temperature is too high for human comfort purpose
chiller is being used for human comfort, should you be
concerned about this, and why?
The packing gland of a centrifugal pump serves to: The drip part of the packing gland gives the evidence that there is water in the
pump
Capacity control of a reciprocating hermetic compressor operation of the hot gas bypass valve
is typically achieved through
The most important reason to sub-cool the refrigerant in A pure liquid refrigerant will enter the metering device
the condenser is to ensure that:
A refrigeration engineer is logging reading from a An expansion valve that is open to wide
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.
A low side float valve is used to maintain: The level of the refrigerant in the evaporator
Regarding fire safety, which ASHRAE refrigerant safety A1
classification indicates no flammability and lower toxicity?
When an expansion valve is operating properly, at the Only superheated vapor
end of the evaporator will contain:
What information is not contained in a Material Safety cost of the material
Data Sheet-MSDS?
In a steam turbine, what is the function of the kingsbury Maintain axial positioning of the rotor shaft
thrust bearing
A centrifugal water pump is considered to be fully The pump is full of liquid
primed when
Copper tubing refrigerant lines must be installed for a Lever Type Tubing bender
new system. It is a well known service practice that tubing
collapses at bends that must be made, the refrigerant
engineer should use
A reciprocating compressor is making a knocking sound The slugging of the liquid refrigerant
during operation. If the refrigerant worn parts are not
causing the knocking, what is probably the cause
In order for a refrigerant to become superheated it must Where no liquid refrigerant is present
be heated in a section of the low side refrigerant line:
Answers
C
Terms in this set (223)
The efficiency of the refrigerant cycle is affected by the Lowering the condensing pressure
operation of the condenser. of the following, a more
efficient centrifugal compressor operation results from:
The heat removed from the refrigerant in a condenser is: Sensible and Latent Heat
The refrigerant unit that you have been assigned to is Are approved by the US Department of Transportation
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:
Which of the following best describes how the cylinder Keep in the suction Valve opened while the compressor is in the return stroke
unloader work?
In most semi Hermetic compressors,the suction vapor is Cools the motor
used to:
The amount of refrigerant that flows through the orifices Difference between the high side and low side pressure
of a economizer is determined by the:
The installation of an inline refrigerant cleaning system is To remove impurities from the system
advisable
The type of refrigerant system that is least likely to leak The indirect System
refrigerant into the building space that are being cooled
The suction pressure of a reciprocating compressor is 65 1.69
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:
A superheated Vapor is a: Dry vapor above the saturation temperature
A refrigerant engineer verifies that a condenser water A faulty cooling tower water level controller
pump is cavitating. of the following the most likely cause
for this condition is:
A centriugal water pump is known as a lift pump when the water supply to the pump suction inlet is below the pump level
the:
, A TEV is used to maintain constant: Evaporator Superheat
The chilled water supply to the building is 55F. If the Yes,this temperature is too high for human comfort purpose
chiller is being used for human comfort, should you be
concerned about this, and why?
The packing gland of a centrifugal pump serves to: The drip part of the packing gland gives the evidence that there is water in the
pump
Capacity control of a reciprocating hermetic compressor operation of the hot gas bypass valve
is typically achieved through
The most important reason to sub-cool the refrigerant in A pure liquid refrigerant will enter the metering device
the condenser is to ensure that:
A refrigeration engineer is logging reading from a An expansion valve that is open to wide
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.
A low side float valve is used to maintain: The level of the refrigerant in the evaporator
Regarding fire safety, which ASHRAE refrigerant safety A1
classification indicates no flammability and lower toxicity?
When an expansion valve is operating properly, at the Only superheated vapor
end of the evaporator will contain:
What information is not contained in a Material Safety cost of the material
Data Sheet-MSDS?
In a steam turbine, what is the function of the kingsbury Maintain axial positioning of the rotor shaft
thrust bearing
A centrifugal water pump is considered to be fully The pump is full of liquid
primed when
Copper tubing refrigerant lines must be installed for a Lever Type Tubing bender
new system. It is a well known service practice that tubing
collapses at bends that must be made, the refrigerant
engineer should use
A reciprocating compressor is making a knocking sound The slugging of the liquid refrigerant
during operation. If the refrigerant worn parts are not
causing the knocking, what is probably the cause
In order for a refrigerant to become superheated it must Where no liquid refrigerant is present
be heated in a section of the low side refrigerant line:
