NYC - Final RMO questions with verified
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
a. Raising the condenser liquid level to the maximum
b. lowering the chilled water set point.
c. raising the condenser head pressure
d. lowering the condenser pressure Ans✓✓-Lowering the condensing pressure
The heat removed from the refrigerant in a condenser is
a. sensible and latent heat
b. latent heat only
c. radiant heat only
d. sensible heat only Ans✓✓-sensible and latent heat
The refrigerant unit that you have been assigned to is being taken out of service
for major repair. You have been assigned to withdraw refrigerant from storage in
suitable containers. According to the NYC fire code, you must ensure that the
containers
a. do not weigh more than 200lbs when filled
b. Are approved by the US Department of Transportation (DOT)
c. are approved by the OSHA association
, d. do not exceed 55 gallon in capacity Ans✓✓-Are approved by the US
Department of Transportation (DOT)
Which of the following best describes how the cylinder unloader work?
a. Keep in the suction valve opened while the compressor is in the return stroke.
b. controls the clearance volume in the compressor with a solenoid
c. controls the opening of the passage into the compressor with variable vanes
d. unloads the pistons to create less pressure Ans✓✓-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 Ans✓✓-Cools
the motor
The amount of refrigerant that flows through the orifices of an economizer is
determined by the Ans✓✓-Difference between the high side and low side
pressure
The installation of an inline refrigerant cleaning system is advisable Ans✓✓-To
remove impurities in the system
The type of refrigerant system that is least likely to leak refrigerant into the
building space that are being cooled are Ans✓✓-Indirect systems
The suction pressure of a reciprocating compressor is 65 PSIG. The discharge
pressure of this compressor is 120 PSIG. The atmospheric is 14.7PSI. the
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
a. Raising the condenser liquid level to the maximum
b. lowering the chilled water set point.
c. raising the condenser head pressure
d. lowering the condenser pressure Ans✓✓-Lowering the condensing pressure
The heat removed from the refrigerant in a condenser is
a. sensible and latent heat
b. latent heat only
c. radiant heat only
d. sensible heat only Ans✓✓-sensible and latent heat
The refrigerant unit that you have been assigned to is being taken out of service
for major repair. You have been assigned to withdraw refrigerant from storage in
suitable containers. According to the NYC fire code, you must ensure that the
containers
a. do not weigh more than 200lbs when filled
b. Are approved by the US Department of Transportation (DOT)
c. are approved by the OSHA association
, d. do not exceed 55 gallon in capacity Ans✓✓-Are approved by the US
Department of Transportation (DOT)
Which of the following best describes how the cylinder unloader work?
a. Keep in the suction valve opened while the compressor is in the return stroke.
b. controls the clearance volume in the compressor with a solenoid
c. controls the opening of the passage into the compressor with variable vanes
d. unloads the pistons to create less pressure Ans✓✓-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 Ans✓✓-Cools
the motor
The amount of refrigerant that flows through the orifices of an economizer is
determined by the Ans✓✓-Difference between the high side and low side
pressure
The installation of an inline refrigerant cleaning system is advisable Ans✓✓-To
remove impurities in the system
The type of refrigerant system that is least likely to leak refrigerant into the
building space that are being cooled are Ans✓✓-Indirect systems
The suction pressure of a reciprocating compressor is 65 PSIG. The discharge
pressure of this compressor is 120 PSIG. The atmospheric is 14.7PSI. the
