CFESA Refrigeration Certification Test
1. The function of the compressor is : - ANS-B. To lower the pressure inside the evaporator
so that the refrigerant temperature is diminished beneath the temperature of the air within
the field .
2 . Forced air evaporator coils are usually used because : - ANS-A. They take in greater
warmth in much less time .
Three . Evaporator A operates with a five ° TD and evaporator B operates with a 15⁰ TD . -
ANS-D. Box A operates with higher humidity than box B
4 Whenever you re soldering refrigerant strains : - ANS-D. B & C
5 . R404A must be charged right into a system : - ANS-A. In a liquid country
6 . If an evaporator fan motor wishes to get replaced it ought to get replaced with : - ANS-C.
Any motor with the exact HP , velocity , voltage , mounting and rotation
7 . The fan blade on an evaporator or condenser must be located within the housing or
shroud in order that : - ANS-B. The blade is hooked up mid way into the evaporator housing
establishing or fan shroud starting on a condenser .
Eight. Which of the following refrigerants is an interim choice for a substitute for R - 12 in a
system that had a leak in the condenser and misplaced all of its refrigerant ? - ANS-C. R -
409A
nine . Which refrigerant is an interim refrigerant desire for a R502 device that had a prime
leak within the evaporator - ANS-d . R408A
10 . When evacuating a refrigeration system what tool is wanted to make sure a good
evacuation and to assist let you know if there is any moisture or leaks within the gadget : -
ANS-B. Micron gauge
11 . Which refrigerant would you change a stroll in freezer to if changing the condensing unit
on an R502 machine : - ANS-B. R404A
12 . Which word best describes the proper use for a refrigerated field the usage of a cap
tube machine ? - ANS-A. Storage freezer
thirteen . Which is the first-rate instance of the definition of a garage box ? - ANS-A. A
freezer on which the door is opened eight instances an afternoon
, 14 . In order to keep proper temperature under the diverse masses , a cooler or freezer
placed on a the front prep line should be ready with : - ANS-C. A thermal enlargement valve
15 . A cap tube is useless on maximum industrial refrigeration structures because : - ANS-D.
It cannot respond to the refrigerant wishes beneath heavy masses
16 . The sensor bulb on a TEV have to be : - ANS-C. Hooked up tight to a smooth floor on
the suction line close to the opening of the coil
17 . An automated enlargement valve does not : - ANS-C. React well in situations of heavy
loads .
18 . For maximum performance the thermal enlargement valve superheat for a freezer must
be approximately : - ANS-A. Five tiers
19 . For maximum machine performance the TEV superheat for a cooler have to be
approximately : - ANS-C. 8-10 degrees
20 . What form of oil is most normally used with CFC refrigerants ? - ANS-C. Mineral
21 . What kind of oil should be used with R404A ? - ANS-D. Polyolester
22 . What strain relates to twenty ° F on R404A ? - ANS-56.7 psi
23 . What must be the most head pressure for a R404A gadget running in a eighty five ° F
ambient temperature ? - ANS-294 psi
24 . A system with R134A is running at 146 psi head pressure . The temperature measured
four inches out of the condenser is a hundred ° F . The ambient air temperature is 80 ° F . -
ANS-D. The subcooling is 10 °
25 . A gadget operating with refrigerant R404A has a suction pressure of 29 psi . The head
strain is 239 psi . The temperature on the line out of condenser is eighty five tiers. The
temperature at the suction line at the outlet of the evaporator is five ranges . - ANS-the
superheat is 10 stages
26 . An R 404A cooler gadget using a cap tube device has a head pressure of 336 psi and
the road out of the condenser measures ninety five degrees . Calculating the subcooling you
need to see that : - ANS-the gadget may be overcharged
27 . The liquid line out of the liquid line drier is frosted ? This suggests that : - ANS-the drier
is constrained
28 The suction line to the compressor on a freezer the usage of a TEV is frosted and froze .
This may be do to : - ANS-the suction line isn't insulated or is poorly insulated
29 . A capacity relay is stressed out in order that the : - ANS-coil is attached across the not
unusual and start terminals
1. The function of the compressor is : - ANS-B. To lower the pressure inside the evaporator
so that the refrigerant temperature is diminished beneath the temperature of the air within
the field .
2 . Forced air evaporator coils are usually used because : - ANS-A. They take in greater
warmth in much less time .
Three . Evaporator A operates with a five ° TD and evaporator B operates with a 15⁰ TD . -
ANS-D. Box A operates with higher humidity than box B
4 Whenever you re soldering refrigerant strains : - ANS-D. B & C
5 . R404A must be charged right into a system : - ANS-A. In a liquid country
6 . If an evaporator fan motor wishes to get replaced it ought to get replaced with : - ANS-C.
Any motor with the exact HP , velocity , voltage , mounting and rotation
7 . The fan blade on an evaporator or condenser must be located within the housing or
shroud in order that : - ANS-B. The blade is hooked up mid way into the evaporator housing
establishing or fan shroud starting on a condenser .
Eight. Which of the following refrigerants is an interim choice for a substitute for R - 12 in a
system that had a leak in the condenser and misplaced all of its refrigerant ? - ANS-C. R -
409A
nine . Which refrigerant is an interim refrigerant desire for a R502 device that had a prime
leak within the evaporator - ANS-d . R408A
10 . When evacuating a refrigeration system what tool is wanted to make sure a good
evacuation and to assist let you know if there is any moisture or leaks within the gadget : -
ANS-B. Micron gauge
11 . Which refrigerant would you change a stroll in freezer to if changing the condensing unit
on an R502 machine : - ANS-B. R404A
12 . Which word best describes the proper use for a refrigerated field the usage of a cap
tube machine ? - ANS-A. Storage freezer
thirteen . Which is the first-rate instance of the definition of a garage box ? - ANS-A. A
freezer on which the door is opened eight instances an afternoon
, 14 . In order to keep proper temperature under the diverse masses , a cooler or freezer
placed on a the front prep line should be ready with : - ANS-C. A thermal enlargement valve
15 . A cap tube is useless on maximum industrial refrigeration structures because : - ANS-D.
It cannot respond to the refrigerant wishes beneath heavy masses
16 . The sensor bulb on a TEV have to be : - ANS-C. Hooked up tight to a smooth floor on
the suction line close to the opening of the coil
17 . An automated enlargement valve does not : - ANS-C. React well in situations of heavy
loads .
18 . For maximum performance the thermal enlargement valve superheat for a freezer must
be approximately : - ANS-A. Five tiers
19 . For maximum machine performance the TEV superheat for a cooler have to be
approximately : - ANS-C. 8-10 degrees
20 . What form of oil is most normally used with CFC refrigerants ? - ANS-C. Mineral
21 . What kind of oil should be used with R404A ? - ANS-D. Polyolester
22 . What strain relates to twenty ° F on R404A ? - ANS-56.7 psi
23 . What must be the most head pressure for a R404A gadget running in a eighty five ° F
ambient temperature ? - ANS-294 psi
24 . A system with R134A is running at 146 psi head pressure . The temperature measured
four inches out of the condenser is a hundred ° F . The ambient air temperature is 80 ° F . -
ANS-D. The subcooling is 10 °
25 . A gadget operating with refrigerant R404A has a suction pressure of 29 psi . The head
strain is 239 psi . The temperature on the line out of condenser is eighty five tiers. The
temperature at the suction line at the outlet of the evaporator is five ranges . - ANS-the
superheat is 10 stages
26 . An R 404A cooler gadget using a cap tube device has a head pressure of 336 psi and
the road out of the condenser measures ninety five degrees . Calculating the subcooling you
need to see that : - ANS-the gadget may be overcharged
27 . The liquid line out of the liquid line drier is frosted ? This suggests that : - ANS-the drier
is constrained
28 The suction line to the compressor on a freezer the usage of a TEV is frosted and froze .
This may be do to : - ANS-the suction line isn't insulated or is poorly insulated
29 . A capacity relay is stressed out in order that the : - ANS-coil is attached across the not
unusual and start terminals
