CFESA REFRIGERATION CERTIFICATION 7 2026
FINAL PAPER COMPLETE QUESTIONS AND
ANSWERS FULL SOLUTION
◉ 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..
Answer: A. evaporator superheat.
◉ An expansion device that is stuck open will cause:
A. low suction pressure
B. a starved evaporator.
C. excessive superheat
D. a flooded evaporator.
Answer: D. a flooded evaporator
,◉ When measuring evaporator superheat on a commercial system
that has a long suction line, the pressure reading should be taken at
the:
A. compressor inlet.
B. evaporator outlet.
C. condenser outlet.
D. receiver Inlet..
Answer: A. compressor inlet. (Suction Line)
◉ Superheat measurements are best taken:
A. during a hot pull down.
B. at 8°F to 12°F.
C. during defrost.
D. with the system operating at design conditions..
Answer: D. with the system operating at design conditions.
◉ A technician is checking the superheat on a multi circuit
evaporator and finds one of the circuits has a superheat that is
higher than the others. This could be caused by:
A. a dirty coil.
B. a refrigerant overcharge
C. uneven air distribution.
D. a blocked distributor..
,Answer: D. a blocked distributor.
◉ A TEV with an external equalizer is used on:
A. evaporators with a high pressure drop.
B. evaporators with a low pressure drop.
C. high temperature applications only.
D. all evaporators..
Answer: A. evaporators with a high pressure drop.
◉ Dry type evaporators operate most efficiently with a superheat
setting of approximately:
A. 8° F to 12°F
B. 13° F to 19°F
C. 20° F to 30°F
D. 31° F to 40° F.
Answer: A. 8° F to 12°F
◉ An evaporator used to chill liquids in operating with a normal
superheat setting, but the system is not cooling the product properly.
Which of the following is the most likely cause?
A. overcharge of refrigerant
B. undercharge of refrigerant
, C. the circulator
D. the TEV.
Answer: C. the circulator
◉ What time interval is required between each superheat
adjustment?
A. Not less than 1 hour
B. About 10-15 minutes
C. At least 1/2 hour.
D. No time delay..
Answer: B. About 10-15 minutes
◉ A low temperature evaporator used for cooling space or product
refrigeration:
A. is the same as one used for medium or high temperatures.
B. must have fins spaced closer together.
C. must be frosted periodically.
D. must be defrosted periodically..
Answer: D. must be defrosted periodically.
◉ Some special applications use a flooded evaporator (operated full
of refrigerant). In order to maintain the proper level of liquid
refrigerant, a ____ type metering device is used.
FINAL PAPER COMPLETE QUESTIONS AND
ANSWERS FULL SOLUTION
◉ 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..
Answer: A. evaporator superheat.
◉ An expansion device that is stuck open will cause:
A. low suction pressure
B. a starved evaporator.
C. excessive superheat
D. a flooded evaporator.
Answer: D. a flooded evaporator
,◉ When measuring evaporator superheat on a commercial system
that has a long suction line, the pressure reading should be taken at
the:
A. compressor inlet.
B. evaporator outlet.
C. condenser outlet.
D. receiver Inlet..
Answer: A. compressor inlet. (Suction Line)
◉ Superheat measurements are best taken:
A. during a hot pull down.
B. at 8°F to 12°F.
C. during defrost.
D. with the system operating at design conditions..
Answer: D. with the system operating at design conditions.
◉ A technician is checking the superheat on a multi circuit
evaporator and finds one of the circuits has a superheat that is
higher than the others. This could be caused by:
A. a dirty coil.
B. a refrigerant overcharge
C. uneven air distribution.
D. a blocked distributor..
,Answer: D. a blocked distributor.
◉ A TEV with an external equalizer is used on:
A. evaporators with a high pressure drop.
B. evaporators with a low pressure drop.
C. high temperature applications only.
D. all evaporators..
Answer: A. evaporators with a high pressure drop.
◉ Dry type evaporators operate most efficiently with a superheat
setting of approximately:
A. 8° F to 12°F
B. 13° F to 19°F
C. 20° F to 30°F
D. 31° F to 40° F.
Answer: A. 8° F to 12°F
◉ An evaporator used to chill liquids in operating with a normal
superheat setting, but the system is not cooling the product properly.
Which of the following is the most likely cause?
A. overcharge of refrigerant
B. undercharge of refrigerant
, C. the circulator
D. the TEV.
Answer: C. the circulator
◉ What time interval is required between each superheat
adjustment?
A. Not less than 1 hour
B. About 10-15 minutes
C. At least 1/2 hour.
D. No time delay..
Answer: B. About 10-15 minutes
◉ A low temperature evaporator used for cooling space or product
refrigeration:
A. is the same as one used for medium or high temperatures.
B. must have fins spaced closer together.
C. must be frosted periodically.
D. must be defrosted periodically..
Answer: D. must be defrosted periodically.
◉ Some special applications use a flooded evaporator (operated full
of refrigerant). In order to maintain the proper level of liquid
refrigerant, a ____ type metering device is used.
