EPA 608 UNIVERSAL CERTIFICATION
EXAM 2026 COMPREHENSIVE PRACTICE
QUESTIONS AND VERIFIED CORRECT
ANSWERS WITH DETAILED RATIONALES
TYPE I, TYPE II AND TYPE III COMPLETE
STUDY GUIDE
Never use oxygen or compressed air to pressurize a system because: - when
mixed with compressor oil or some refrigerants, it could explode. -
CORRECT ANSWER -
Refrigerant cylinders should always be: - free of rust and damage; color
coded to indicate the contents; secu Refrigeration technicians who violate
the Clean Air Act can: - - CORRECT ANSWER -Lose their EPA certification,
be fined, be required to appear in Federal court.
After 1995, any supplies of CFC refrigerants to service existing units in the
USA can only come from: - - CORRECT ANSWER -recovery and recycling.
,Refrigerant that is recovered can be returned to: - - CORRECT ANSWER -the
same system or other systems owned by the same person without
restriction.
Refrigerant can not be called "reclaimed" unless it: - . - CORRECT ANSWER -
has been chemically analyzed and the refrigerant meets the ARI-700
standard.
The EPA can require a technician to demonstrate their ability to perform
proper procedures for recovering and/or recycling refrigerant. Failure to
demonstrate competency can result in: - - CORRECT ANSWER -revocation of
the technicians certification.
What characteristic(s) of CFCs make them more likely to reach the
stratosphere than most other compounds containing chlorine? - - CORRECT
ANSWER -Refrigerants that contain chlorine but not hydrogen are so stable
that they do not break down in the lower atmosphere after being released.
The chlorine or bromine reacts with the ozone, causing it to change back to
oxygen, thus destroying the ozone layer.
A system is considered dehydrated when: - - CORRECT ANSWER -the
vacuum indicator shows you have reached and held the required finished
vacuum.
Disposable refrigerant containers are used for ______ - CORRECT
ANSWER -virgin refrigerant
Which refrigerant is an HCFC? - - CORRECT ANSWER -R-123, R-124, R-22
, What statement is true about an azeotropic refrigerant mixture? - -
CORRECT ANSWER -It is a mixture that acts like a single-component
refrigerant over its entire range.
Chlorofluorocarbos (CFCs) and hydrochlorofluorocarbons (HCFCs) have
which of the following in common? - - CORRECT ANSWER -It is a mixture
that acts like a single-component refrigerant over its entire range.
To scrap a disposable cylinder, the internal cylinder pressure should be
reduced to at least: - - CORRECT ANSWER -0 psig.
Manifold gauge sets are often color coded, when this is done, the high
pressure gauge is color coded: - Red. - CORRECT ANSWER -
In general, blended refrigerants should be charged: - - CORRECT ANSWER -
as a liquid.
Blended refrigerants leak from a system: - - CORRECT ANSWER -in uneven
amounts due to different vapor pressures.
Which of the following gases help form the earth's protective shield? -
Stratospheric Ozone - CORRECT ANSWER -
In a refrigerant system, the device that changes a low pressure vapor to a
high pressure vapor is the: - compressor. - CORRECT ANSWER -
EXAM 2026 COMPREHENSIVE PRACTICE
QUESTIONS AND VERIFIED CORRECT
ANSWERS WITH DETAILED RATIONALES
TYPE I, TYPE II AND TYPE III COMPLETE
STUDY GUIDE
Never use oxygen or compressed air to pressurize a system because: - when
mixed with compressor oil or some refrigerants, it could explode. -
CORRECT ANSWER -
Refrigerant cylinders should always be: - free of rust and damage; color
coded to indicate the contents; secu Refrigeration technicians who violate
the Clean Air Act can: - - CORRECT ANSWER -Lose their EPA certification,
be fined, be required to appear in Federal court.
After 1995, any supplies of CFC refrigerants to service existing units in the
USA can only come from: - - CORRECT ANSWER -recovery and recycling.
,Refrigerant that is recovered can be returned to: - - CORRECT ANSWER -the
same system or other systems owned by the same person without
restriction.
Refrigerant can not be called "reclaimed" unless it: - . - CORRECT ANSWER -
has been chemically analyzed and the refrigerant meets the ARI-700
standard.
The EPA can require a technician to demonstrate their ability to perform
proper procedures for recovering and/or recycling refrigerant. Failure to
demonstrate competency can result in: - - CORRECT ANSWER -revocation of
the technicians certification.
What characteristic(s) of CFCs make them more likely to reach the
stratosphere than most other compounds containing chlorine? - - CORRECT
ANSWER -Refrigerants that contain chlorine but not hydrogen are so stable
that they do not break down in the lower atmosphere after being released.
The chlorine or bromine reacts with the ozone, causing it to change back to
oxygen, thus destroying the ozone layer.
A system is considered dehydrated when: - - CORRECT ANSWER -the
vacuum indicator shows you have reached and held the required finished
vacuum.
Disposable refrigerant containers are used for ______ - CORRECT
ANSWER -virgin refrigerant
Which refrigerant is an HCFC? - - CORRECT ANSWER -R-123, R-124, R-22
, What statement is true about an azeotropic refrigerant mixture? - -
CORRECT ANSWER -It is a mixture that acts like a single-component
refrigerant over its entire range.
Chlorofluorocarbos (CFCs) and hydrochlorofluorocarbons (HCFCs) have
which of the following in common? - - CORRECT ANSWER -It is a mixture
that acts like a single-component refrigerant over its entire range.
To scrap a disposable cylinder, the internal cylinder pressure should be
reduced to at least: - - CORRECT ANSWER -0 psig.
Manifold gauge sets are often color coded, when this is done, the high
pressure gauge is color coded: - Red. - CORRECT ANSWER -
In general, blended refrigerants should be charged: - - CORRECT ANSWER -
as a liquid.
Blended refrigerants leak from a system: - - CORRECT ANSWER -in uneven
amounts due to different vapor pressures.
Which of the following gases help form the earth's protective shield? -
Stratospheric Ozone - CORRECT ANSWER -
In a refrigerant system, the device that changes a low pressure vapor to a
high pressure vapor is the: - compressor. - CORRECT ANSWER -
