REFRIGERATION EXCELLENCE 100
QUESTIONS WITH PASSED GRADES!!
1 of 100
Term
Automatic pump down systems are used to prevent
Power surges on-demand utility systems
Surges of liquid refrigerant (slugging) during shutdown
Oil foaming at shutdown
Migration of refrigerant to the crankcase during off cycles
Give this one a try later!
, D. Compressor crankcase pressure D. Migration of refrigerant to
and oil pump discharge the crankcase during off
pressure cycles
A. Oil traps should be installed in all A. Saturated, superheated, or sub
vapor carrying lines cooled refrigerant
Don't know?
2 of 100
Term
100. The term "cryogenics" refers to refrigeration systems
operating at what temperature range?
A. 0°F to -35°F
B.-40°F to -75°F
C. -100°F to -175°F
D.-250°F to -450°F
Give this one a try later!
C. Compression ratio A. 0°F to 32°F
D. -250°F to -450°F D. Fan cycle control
Don't know?
3 of 100
,Term
2. The difference between the temperature of the refrigerant
boiling in the evaporator and the temperature at the evaporator
outlet is known as
A. Evaporator superheat
B.Latent heat
C. Evaporator sub-cooling
D.Sublimation
Give this one a try later!
B. Evaporator pressure regulator
C. Compression ratio (EPR)
A. Evaporator superheat C. Cut in and cut out
Don't know?
4 of 100
Term
79. Defrosting a low temperature evaporated can be accomplished
by
A. Stopping the evaporator fan motor
B.Reversing the compressor rotation
C. Using electric heaters
D.Installing a modulating valve
Give this one a try later!
, C. Crank case pressure regulator
(CPR) B. Reduced heat transfer
C. Using electric heaters D. De-superheat, then sub-cool
Don't know?
5 of 100
Term
66. If an oil separator is not used,
A. Oil traps should be installed in all vapor carrying lines
B. The system should be charged with 1/2 quart more oil
C. The system should be charged with 1/2 quart less oil
D.The system should be charged with less refrigerant
Give this one a try later!
D. The refrigerant is A. Oil traps should be installed
indirectly cooled in the in all vapor carrying lines
cooling tower
A. Refrigerant migration to the
compressor crankcase during the A. A common suction, but not a
off cycle common discharge header
Don't know?
QUESTIONS WITH PASSED GRADES!!
1 of 100
Term
Automatic pump down systems are used to prevent
Power surges on-demand utility systems
Surges of liquid refrigerant (slugging) during shutdown
Oil foaming at shutdown
Migration of refrigerant to the crankcase during off cycles
Give this one a try later!
, D. Compressor crankcase pressure D. Migration of refrigerant to
and oil pump discharge the crankcase during off
pressure cycles
A. Oil traps should be installed in all A. Saturated, superheated, or sub
vapor carrying lines cooled refrigerant
Don't know?
2 of 100
Term
100. The term "cryogenics" refers to refrigeration systems
operating at what temperature range?
A. 0°F to -35°F
B.-40°F to -75°F
C. -100°F to -175°F
D.-250°F to -450°F
Give this one a try later!
C. Compression ratio A. 0°F to 32°F
D. -250°F to -450°F D. Fan cycle control
Don't know?
3 of 100
,Term
2. The difference between the temperature of the refrigerant
boiling in the evaporator and the temperature at the evaporator
outlet is known as
A. Evaporator superheat
B.Latent heat
C. Evaporator sub-cooling
D.Sublimation
Give this one a try later!
B. Evaporator pressure regulator
C. Compression ratio (EPR)
A. Evaporator superheat C. Cut in and cut out
Don't know?
4 of 100
Term
79. Defrosting a low temperature evaporated can be accomplished
by
A. Stopping the evaporator fan motor
B.Reversing the compressor rotation
C. Using electric heaters
D.Installing a modulating valve
Give this one a try later!
, C. Crank case pressure regulator
(CPR) B. Reduced heat transfer
C. Using electric heaters D. De-superheat, then sub-cool
Don't know?
5 of 100
Term
66. If an oil separator is not used,
A. Oil traps should be installed in all vapor carrying lines
B. The system should be charged with 1/2 quart more oil
C. The system should be charged with 1/2 quart less oil
D.The system should be charged with less refrigerant
Give this one a try later!
D. The refrigerant is A. Oil traps should be installed
indirectly cooled in the in all vapor carrying lines
cooling tower
A. Refrigerant migration to the
compressor crankcase during the A. A common suction, but not a
off cycle common discharge header
Don't know?
