CFESA REFRIGERATION CERTIFICATION TEST EXAM QUESTIONS AND ANSWERS
1. The function of the compressor is : - CORRECT ANSWER✅✅B. to lower the pressure in the
evaporator so that the refrigerant temperature is lowered below the temperature of the air in the box .
2 . Forced air evaporator coils are commonly used because : - CORRECT ANSWER✅✅A. they absorb
more heat in less time .
3 . Evaporator A operates with a 5 ° TD and evaporator B operates with a 15⁰ TD . - CORRECT
ANSWER✅✅D. Box A operates with higher humidity than box B
4 Whenever you re soldering refrigerant lines : - CORRECT ANSWER✅✅D. B & C
5 . R404A must be charged into a system : - CORRECT ANSWER✅✅A. In a liquid state
6 . If an evaporator fan motor needs to be replaced it must be replaced with : - CORRECT
ANSWER✅✅C. Any motor with the exact HP , speed , voltage , mounting and rotation
7 . The fan blade on an evaporator or condenser must be positioned in the housing or shroud so that : -
CORRECT ANSWER✅✅B. The blade is mounted mid way into the evaporator housing opening or fan
shroud opening on a condenser .
8. Which of the following refrigerants is an interim choice for a replacement for R - 12 in a system that
had a leak in the condenser and lost all of its refrigerant ? - CORRECT ANSWER✅✅C. R - 409A
9 . Which refrigerant is an interim refrigerant choice for a R502 system that had a major leak in the
evaporator - CORRECT ANSWER✅✅d . R408A
10 . When evacuating a refrigeration system what tool is needed to ensure a good evacuation and to
help inform you if there is any moisture or leaks in the system : - CORRECT ANSWER✅✅B. Micron
gauge
, 11 . Which refrigerant would you convert a walk in freezer to if replacing the condensing unit on an R502
system : - CORRECT ANSWER✅✅B. R404A
12 . Which phrase best describes the proper use for a refrigerated box using a cap tube system ? -
CORRECT ANSWER✅✅A. Storage freezer
13 . Which is the best example of the definition of a storage box ? - CORRECT ANSWER✅✅A. A freezer
on which the door is opened 8 times a day
14 . In order to maintain proper temperature under the various loads , a cooler or freezer located on a
front prep line must be equipped with : - CORRECT ANSWER✅✅C. A thermal expansion valve
15 . A cap tube is ineffective on most commercial refrigeration systems because : - CORRECT
ANSWER✅✅D. it cannot respond to the refrigerant needs under heavy loads
16 . The sensor bulb on a TEV must be : - CORRECT ANSWER✅✅C. mounted tight to a clean surface on
the suction line close to the outlet of the coil
17 . An automatic expansion valve does not : - CORRECT ANSWER✅✅C. react well in situations of heavy
loads .
18 . For maximum efficiency the thermal expansion valve superheat for a freezer should be about : -
CORRECT ANSWER✅✅A. 5 degrees
19 . For maximum system efficiency the TEV superheat for a cooler should be about : - CORRECT
ANSWER✅✅C. 8-10 degrees
20 . What type of oil is most commonly used with CFC refrigerants ? - CORRECT ANSWER✅✅C. Mineral
21 . What type of oil must be used with R404A ? - CORRECT ANSWER✅✅D. Polyolester
1. The function of the compressor is : - CORRECT ANSWER✅✅B. to lower the pressure in the
evaporator so that the refrigerant temperature is lowered below the temperature of the air in the box .
2 . Forced air evaporator coils are commonly used because : - CORRECT ANSWER✅✅A. they absorb
more heat in less time .
3 . Evaporator A operates with a 5 ° TD and evaporator B operates with a 15⁰ TD . - CORRECT
ANSWER✅✅D. Box A operates with higher humidity than box B
4 Whenever you re soldering refrigerant lines : - CORRECT ANSWER✅✅D. B & C
5 . R404A must be charged into a system : - CORRECT ANSWER✅✅A. In a liquid state
6 . If an evaporator fan motor needs to be replaced it must be replaced with : - CORRECT
ANSWER✅✅C. Any motor with the exact HP , speed , voltage , mounting and rotation
7 . The fan blade on an evaporator or condenser must be positioned in the housing or shroud so that : -
CORRECT ANSWER✅✅B. The blade is mounted mid way into the evaporator housing opening or fan
shroud opening on a condenser .
8. Which of the following refrigerants is an interim choice for a replacement for R - 12 in a system that
had a leak in the condenser and lost all of its refrigerant ? - CORRECT ANSWER✅✅C. R - 409A
9 . Which refrigerant is an interim refrigerant choice for a R502 system that had a major leak in the
evaporator - CORRECT ANSWER✅✅d . R408A
10 . When evacuating a refrigeration system what tool is needed to ensure a good evacuation and to
help inform you if there is any moisture or leaks in the system : - CORRECT ANSWER✅✅B. Micron
gauge
, 11 . Which refrigerant would you convert a walk in freezer to if replacing the condensing unit on an R502
system : - CORRECT ANSWER✅✅B. R404A
12 . Which phrase best describes the proper use for a refrigerated box using a cap tube system ? -
CORRECT ANSWER✅✅A. Storage freezer
13 . Which is the best example of the definition of a storage box ? - CORRECT ANSWER✅✅A. A freezer
on which the door is opened 8 times a day
14 . In order to maintain proper temperature under the various loads , a cooler or freezer located on a
front prep line must be equipped with : - CORRECT ANSWER✅✅C. A thermal expansion valve
15 . A cap tube is ineffective on most commercial refrigeration systems because : - CORRECT
ANSWER✅✅D. it cannot respond to the refrigerant needs under heavy loads
16 . The sensor bulb on a TEV must be : - CORRECT ANSWER✅✅C. mounted tight to a clean surface on
the suction line close to the outlet of the coil
17 . An automatic expansion valve does not : - CORRECT ANSWER✅✅C. react well in situations of heavy
loads .
18 . For maximum efficiency the thermal expansion valve superheat for a freezer should be about : -
CORRECT ANSWER✅✅A. 5 degrees
19 . For maximum system efficiency the TEV superheat for a cooler should be about : - CORRECT
ANSWER✅✅C. 8-10 degrees
20 . What type of oil is most commonly used with CFC refrigerants ? - CORRECT ANSWER✅✅C. Mineral
21 . What type of oil must be used with R404A ? - CORRECT ANSWER✅✅D. Polyolester
