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HVAC EPA Exam Questions And Answers
|Latest 2025 | Guaranteed Pass
One instance when ppe should be worn is... - Answer✔handling and filling refrigerant cylinders
when scrapping a disposable cylinder, the internal cylinder pressure should be reduced to at
least... - Answer✔0 psig
the center port on a three port manifold is used for - Answer✔recovery, evacuation, and
charging
an oil sample should be taken when... - Answer✔the unit has had a leak or a major component
failure
long hoses between the unit and the recovery machine should be avoided to prevent... -
Answer✔pressure drop, increased recovery time, and emissions (ALL OF THE ABOVE)
1
, ©THESTAR 2025 ALL RIGHTS RESERVED 12:35 PM A+
during servicing of a refrigeration system containing R-12, the refrigerant must be -
Answer✔recovered
a system is said to be dehydrated when - Answer✔the vacuum indicator shows you have
reached and held the required finished vacuum
how many different refrigerants may be recovered into the same cylinder? - Answer✔only ONE
before you dispose of any appliance containing a CFC or HCFC refrigerant, you must.... -
Answer✔recover the refrigerant
during dehydration of a refrigeration system, the system may be heated to - Answer✔decrease
dehydration time
all devices used for refrigerant recovery must: - Answer✔meet EPA standards
ester based oils can be mixed with... - Answer✔no other oils
2
, ©THESTAR 2025 ALL RIGHTS RESERVED 12:35 PM A+
ref. entering the compressor of a refrigeration system is a: - Answer✔superheated vapor
the high pressure gauge on a service manifold sets has a continuous scale, usually calibrated to:
- Answer✔0-500psi
which of the following leak detection methods is considered to be the most effective? -
Answer✔electronic or ultrasonic tester
when transporting cylinders containing used refrigerant, DOT requires that you: -
Answer✔attach DOT classification tags
while servicing a system, the technician discovers that some R-502 was added to an r-22
system. the technician should: - Answer✔recover the refrigerant into a separate tank
a refillable refrigerant cylinder must not be filled above what percent of its capacity by weight?
- Answer✔80%
3
, ©THESTAR 2025 ALL RIGHTS RESERVED 12:35 PM A+
a compound pressure gauge for the low side of the system measures pressure in... -
Answer✔PSIG and in. of mercury
recovery during low ambient temps will: - Answer✔slow the recovery process
cooling occurs in a direct-expansion vapor-compression refrigeration system when: -
Answer✔refrigerant liquid turns into a vapor
a hermetic compressor must never be operated when: - Answer✔there is a dehydration
vacuum in the system
if a system will not gold a vacuum after it has been evacuated, then: - Answer✔the system may
be leaking
a refrigerant lable is placed on a: - Answer✔refrigerant cylnger to be returned for reclaiming
measuring a final system vacuum is done with the: - Answer✔system isolated and vacuum
pump turned off
4
HVAC EPA Exam Questions And Answers
|Latest 2025 | Guaranteed Pass
One instance when ppe should be worn is... - Answer✔handling and filling refrigerant cylinders
when scrapping a disposable cylinder, the internal cylinder pressure should be reduced to at
least... - Answer✔0 psig
the center port on a three port manifold is used for - Answer✔recovery, evacuation, and
charging
an oil sample should be taken when... - Answer✔the unit has had a leak or a major component
failure
long hoses between the unit and the recovery machine should be avoided to prevent... -
Answer✔pressure drop, increased recovery time, and emissions (ALL OF THE ABOVE)
1
, ©THESTAR 2025 ALL RIGHTS RESERVED 12:35 PM A+
during servicing of a refrigeration system containing R-12, the refrigerant must be -
Answer✔recovered
a system is said to be dehydrated when - Answer✔the vacuum indicator shows you have
reached and held the required finished vacuum
how many different refrigerants may be recovered into the same cylinder? - Answer✔only ONE
before you dispose of any appliance containing a CFC or HCFC refrigerant, you must.... -
Answer✔recover the refrigerant
during dehydration of a refrigeration system, the system may be heated to - Answer✔decrease
dehydration time
all devices used for refrigerant recovery must: - Answer✔meet EPA standards
ester based oils can be mixed with... - Answer✔no other oils
2
, ©THESTAR 2025 ALL RIGHTS RESERVED 12:35 PM A+
ref. entering the compressor of a refrigeration system is a: - Answer✔superheated vapor
the high pressure gauge on a service manifold sets has a continuous scale, usually calibrated to:
- Answer✔0-500psi
which of the following leak detection methods is considered to be the most effective? -
Answer✔electronic or ultrasonic tester
when transporting cylinders containing used refrigerant, DOT requires that you: -
Answer✔attach DOT classification tags
while servicing a system, the technician discovers that some R-502 was added to an r-22
system. the technician should: - Answer✔recover the refrigerant into a separate tank
a refillable refrigerant cylinder must not be filled above what percent of its capacity by weight?
- Answer✔80%
3
, ©THESTAR 2025 ALL RIGHTS RESERVED 12:35 PM A+
a compound pressure gauge for the low side of the system measures pressure in... -
Answer✔PSIG and in. of mercury
recovery during low ambient temps will: - Answer✔slow the recovery process
cooling occurs in a direct-expansion vapor-compression refrigeration system when: -
Answer✔refrigerant liquid turns into a vapor
a hermetic compressor must never be operated when: - Answer✔there is a dehydration
vacuum in the system
if a system will not gold a vacuum after it has been evacuated, then: - Answer✔the system may
be leaking
a refrigerant lable is placed on a: - Answer✔refrigerant cylnger to be returned for reclaiming
measuring a final system vacuum is done with the: - Answer✔system isolated and vacuum
pump turned off
4
