EPA 608 UNIVERSAL STUDY GUIDE 2026
QUESTIONS WITH CORRECT ANSWERS
GRADED A+
⩥ After 1995, any supplies of CFC refrigerants to service existing units
in the USA can only come from: - Answer: recovery and recycling.
⩥ Refrigerant that is recovered can be returned to: - Answer: the same
system or other systems owned by the same person without restriction.
⩥ Refrigerant can not be called "reclaimed" unless it: - . 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: - 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? - 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: - Answer: the vacuum
indicator shows you have reached and held the required finished
vacuum.
⩥ Disposable refrigerant containers are used for ______ Answer: virgin
refrigerant
⩥ Which refrigerant is an HCFC? - Answer: R-123, R-124, R-22
⩥ What statement is true about an azeotropic refrigerant mixture? -
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? - 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: - Answer: 0 psig.
⩥ Manifold gauge sets are often color coded, when this is done, the high
pressure gauge is color coded: - Red. Answer:
, ⩥ In general, blended refrigerants should be charged: - Answer: as a
liquid.
⩥ Blended refrigerants leak from a system: - Answer: in uneven
amounts due to different vapor pressures.
⩥ Which of the following gases help form the earth's protective shield? -
Stratospheric Ozone Answer:
⩥ In a refrigerant system, the device that changes a low pressure vapor
to a high pressure vapor is the: - compressor. Answer:
⩥ Data shows that chlorine in the stratosphere comes mainly from CFCs
rather than from natural sources such as volcanoes because: - The rise in
the amount of chlorine in the stratosphere matches the rise in the amount
of fluorine, which has different natural sources than chlorine; The rise in
the amount of chlorine in the stratosphere matches the rise in CFC
emissions; Air samples taken from the stratosphere over erupting
volcanoes show that volcanoes contribute a small quantity of chlorine to
the stratosphere when compared to CFCs; Answer:
⩥ Which atom of the CFC molecule causes ozone depletion? - chlorine
Answer:
QUESTIONS WITH CORRECT ANSWERS
GRADED A+
⩥ After 1995, any supplies of CFC refrigerants to service existing units
in the USA can only come from: - Answer: recovery and recycling.
⩥ Refrigerant that is recovered can be returned to: - Answer: the same
system or other systems owned by the same person without restriction.
⩥ Refrigerant can not be called "reclaimed" unless it: - . 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: - 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? - 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: - Answer: the vacuum
indicator shows you have reached and held the required finished
vacuum.
⩥ Disposable refrigerant containers are used for ______ Answer: virgin
refrigerant
⩥ Which refrigerant is an HCFC? - Answer: R-123, R-124, R-22
⩥ What statement is true about an azeotropic refrigerant mixture? -
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? - 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: - Answer: 0 psig.
⩥ Manifold gauge sets are often color coded, when this is done, the high
pressure gauge is color coded: - Red. Answer:
, ⩥ In general, blended refrigerants should be charged: - Answer: as a
liquid.
⩥ Blended refrigerants leak from a system: - Answer: in uneven
amounts due to different vapor pressures.
⩥ Which of the following gases help form the earth's protective shield? -
Stratospheric Ozone Answer:
⩥ In a refrigerant system, the device that changes a low pressure vapor
to a high pressure vapor is the: - compressor. Answer:
⩥ Data shows that chlorine in the stratosphere comes mainly from CFCs
rather than from natural sources such as volcanoes because: - The rise in
the amount of chlorine in the stratosphere matches the rise in the amount
of fluorine, which has different natural sources than chlorine; The rise in
the amount of chlorine in the stratosphere matches the rise in CFC
emissions; Air samples taken from the stratosphere over erupting
volcanoes show that volcanoes contribute a small quantity of chlorine to
the stratosphere when compared to CFCs; Answer:
⩥ Which atom of the CFC molecule causes ozone depletion? - chlorine
Answer:
