CFESA- Refrigeration Certification -
Test -Questions with Actual Detailed
Answers 2026 Update.
1. The function of the compressor is : - 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 : - 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 . - Answer D.
Box A operates with higher humidity than box B
4 Whenever you re soldering refrigerant lines : - Answer D. B & C
5 . R404A must be charged into a system : - Answer A. In a liquid state
6 . If an evaporator fan motor needs to be replaced it must be replaced with : - 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 : - 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 ? - Answer C. R - 409A
9 . Which refrigerant is an interim refrigerant choice for a R502 system that had a major leak in
the evaporator - 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 : - Answer B. Micron
gauge
11 . Which refrigerant would you convert a walk in freezer to if replacing the condensing unit on
an R502 system : - Answer B. R404A
, 12 . Which phrase best describes the proper use for a refrigerated box using a cap tube system ?
- Answer A. Storage freezer
13 . Which is the best example of the definition of a storage box ? - 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 : - Answer C. A thermal expansion valve
15 . A cap tube is ineffective on most commercial refrigeration systems because : - Answer D. it
cannot respond to the refrigerant needs under heavy loads
16 . The sensor bulb on a TEV must be : - 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 : - Answer C. react well in situations of heavy loads
.
18 . For maximum efficiency the thermal expansion valve superheat for a freezer should be
about : - Answer A. 5 degrees
19 . For maximum system efficiency the TEV superheat for a cooler should be about : - Answer
C. 8-10 degrees
20 . What type of oil is most commonly used with CFC refrigerants ? - Answer C. Mineral
21 . What type of oil must be used with R404A ? - Answer D. Polyolester
22 . What pressure relates to 20 ° F on R404A ? - Answer 56.7 psi
23 . What should be the maximum head pressure for a R404A system operating in a 85 ° F
ambient temperature ? - Answer 294 psi
24 . A system with R134A is operating at 146 psi head pressure . The temperature measured
four inches out of the condenser is 100 ° F . The ambient air temperature is 80 ° F . - Answer D.
the subcooling is 10 °
25 . A system operating with refrigerant R404A has a suction pressure of 29 psi . The head
pressure is 239 psi . The temperature on the line out of condenser is 85 degrees. The
Test -Questions with Actual Detailed
Answers 2026 Update.
1. The function of the compressor is : - 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 : - 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 . - Answer D.
Box A operates with higher humidity than box B
4 Whenever you re soldering refrigerant lines : - Answer D. B & C
5 . R404A must be charged into a system : - Answer A. In a liquid state
6 . If an evaporator fan motor needs to be replaced it must be replaced with : - 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 : - 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 ? - Answer C. R - 409A
9 . Which refrigerant is an interim refrigerant choice for a R502 system that had a major leak in
the evaporator - 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 : - Answer B. Micron
gauge
11 . Which refrigerant would you convert a walk in freezer to if replacing the condensing unit on
an R502 system : - Answer B. R404A
, 12 . Which phrase best describes the proper use for a refrigerated box using a cap tube system ?
- Answer A. Storage freezer
13 . Which is the best example of the definition of a storage box ? - 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 : - Answer C. A thermal expansion valve
15 . A cap tube is ineffective on most commercial refrigeration systems because : - Answer D. it
cannot respond to the refrigerant needs under heavy loads
16 . The sensor bulb on a TEV must be : - 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 : - Answer C. react well in situations of heavy loads
.
18 . For maximum efficiency the thermal expansion valve superheat for a freezer should be
about : - Answer A. 5 degrees
19 . For maximum system efficiency the TEV superheat for a cooler should be about : - Answer
C. 8-10 degrees
20 . What type of oil is most commonly used with CFC refrigerants ? - Answer C. Mineral
21 . What type of oil must be used with R404A ? - Answer D. Polyolester
22 . What pressure relates to 20 ° F on R404A ? - Answer 56.7 psi
23 . What should be the maximum head pressure for a R404A system operating in a 85 ° F
ambient temperature ? - Answer 294 psi
24 . A system with R134A is operating at 146 psi head pressure . The temperature measured
four inches out of the condenser is 100 ° F . The ambient air temperature is 80 ° F . - Answer D.
the subcooling is 10 °
25 . A system operating with refrigerant R404A has a suction pressure of 29 psi . The head
pressure is 239 psi . The temperature on the line out of condenser is 85 degrees. The
