EPA Certification Exam questions with verified answers
2026\2027 A+ Grade
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
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
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 passive
manner, and store it in an external container without necessarily testing or processing.
2026\2027 A+ Grade
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
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
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 passive
manner, and store it in an external container without necessarily testing or processing.
