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EPA CERTIFICATION EXAM QUESTIONS
AND CORRECT ANSWERS 2025
Which Refrigerants contain the most chlorine? - correct-answer-CFC's
As of what date did it become unlawful to intentionally release Class 1 and Class 2
refrigerants to the atmosphere? - correct-answer-July 1, 1992
Which Refrigerants have the lowest zone depletion potential? - correct-answer-
HFC's
The molecule found in CFC's and HCHC's refrigerants that destroys the ozone in
the stratosphere is: - correct-answer-Chlorine
Stratospheric ozone consists of: - correct-answer-Three oxygen atoms
Stratospheric ozone depletion is a _________ problem: - correct-answer-Global
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The Gas in the stratosphere that protects us from ultraviolet radiation is: - correct-
answer-Ozone
Which refrigerant is a CFC? - correct-answer-R-12
Which refrigerant is an HCFC? - correct-answer-R-123 & R-22
Which refrigerant is an HFC? - correct-answer-R-134a
Which refrigerant contains no chlorine? - correct-answer-R-134a
The Molecule found in the stratosphere that indicates stratospheric ozone
depletion is taking place is: - correct-answer-Chlorine monoxide
The following actions would violate the clean air act (CAA): - correct-answer-
Knowingly releasing Class 1 Class 2 substances
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failing to keep or falsifying required records
failing to tech the required evacuation levels before opening a systems to the
atmosphere for service
One time (disposable) refrigerant cylinders are used for: - correct-answer-Virgin
refrigerant
The rule of thumb for refilling approved cylinders is a maximum of _____ percent
liquid? - correct-answer-80%
The time it takes to properly evacuate and dehydrate a system prior to charging
with refrigerant is determined by the: - correct-answer-Total volume of the system
Amount of non-condensibles (moisture) in the system
Ambient Temperature
A system that fails to hold a vacuum after the evacuation process: - correct-
answer-May contain moisture
May have a leak
EPA CERTIFICATION EXAM QUESTIONS
AND CORRECT ANSWERS 2025
Which Refrigerants contain the most chlorine? - correct-answer-CFC's
As of what date did it become unlawful to intentionally release Class 1 and Class 2
refrigerants to the atmosphere? - correct-answer-July 1, 1992
Which Refrigerants have the lowest zone depletion potential? - correct-answer-
HFC's
The molecule found in CFC's and HCHC's refrigerants that destroys the ozone in
the stratosphere is: - correct-answer-Chlorine
Stratospheric ozone consists of: - correct-answer-Three oxygen atoms
Stratospheric ozone depletion is a _________ problem: - correct-answer-Global
, Page |2
The Gas in the stratosphere that protects us from ultraviolet radiation is: - correct-
answer-Ozone
Which refrigerant is a CFC? - correct-answer-R-12
Which refrigerant is an HCFC? - correct-answer-R-123 & R-22
Which refrigerant is an HFC? - correct-answer-R-134a
Which refrigerant contains no chlorine? - correct-answer-R-134a
The Molecule found in the stratosphere that indicates stratospheric ozone
depletion is taking place is: - correct-answer-Chlorine monoxide
The following actions would violate the clean air act (CAA): - correct-answer-
Knowingly releasing Class 1 Class 2 substances
, Page |3
failing to keep or falsifying required records
failing to tech the required evacuation levels before opening a systems to the
atmosphere for service
One time (disposable) refrigerant cylinders are used for: - correct-answer-Virgin
refrigerant
The rule of thumb for refilling approved cylinders is a maximum of _____ percent
liquid? - correct-answer-80%
The time it takes to properly evacuate and dehydrate a system prior to charging
with refrigerant is determined by the: - correct-answer-Total volume of the system
Amount of non-condensibles (moisture) in the system
Ambient Temperature
A system that fails to hold a vacuum after the evacuation process: - correct-
answer-May contain moisture
May have a leak
