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EPA CERTIFICATION EXAM QUESTIONS
AND 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
To recover refrigerant is to: - correct answer- Remove
refrigerant is any condition from a system in either an active or
EPA CERTIFICATION EXAM QUESTIONS
AND 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
,2 | Page
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
, 3 | Page
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
To recover refrigerant is to: - correct answer- Remove
refrigerant is any condition from a system in either an active or
