1|Page
EPA 608 UNIVERSAL TEST EXAM|| 2024-2025
QUESTIONS WITH COMPLETE SOLUTIONS 100%
ALREADY GRADED A+|| ASSURED PASS!!!
Which safety precaution(s) should always be followed - ANSWER:
Never apply an open flame to a refrigerant cylinder; never cut or weld
any refrigerant line when refrigerant is in the line; never use oxygen to
purge lines or to pressurize a system.
In a vapor compression refrigeration system, cooling occurs when -
ANSWER:
refrigerant liquid turns to a vapor.
The evacuation of a system is a method of - ANSWER: dehydration.
Each chlorine atom in the stratosphere can destroy____ozone
molecules -
ANSWER: 100,000
An example of a HFC refrigerant is - ANSWER: R-410A
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Which gas(es) would cause the LEAST damage to the environment
during a leak check - ANSWER: dry nitrogen
Refrigerant migrates to the compressor crankcase because of a
difference in______between the refrigerant and the oil - ANSWER:
vapor pressure.
Which refrigerant is an HCFC - ANSWER: R-22, R-123, R-124
It is important not to mix R-22 and R-410A refrigerants in the same
container because - ANSWER: the mixture may be impossible to
reclaim.
When using recover unit, the fill level of the recovery tank can be
controlled by - ANSWER: a mechanical switch; an electronic shut-off
device; weight
Which of the following refrigerant releases is a violation of the EPA
prohibition on venting - ANSWER: release of mixtures of nitrogen and
refrigerant that result from adding nitrogen to a fully charged appliance
to "leak-check" the appliance.
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Which of the following human health effects could result from an
increase in ultraviolet radiation - ANSWER: an increase in cataracts
cases
Never use an open flame to heat a refrigerant tank because - ANSWER:
it can result in venting refrigerant to the atmosphere; the tank may
explode, causing serious injury to people nearby; refrigerant in the tank
may decompose, forming a toxic material.
When transporting cylinders containing used refrigerant, the DOT
requires that you - ANSWER: attach DOT classification tags
According to ASHRAE's 1992 refrigerant safety classification which of
the following designations would be the most safe - ANSWER: A-1
The over-evacuation of a system - ANSWER: does not occur.
Equipment covered by EPA regulations include - ANSWER: all air-
conditioning and refrigeration equipment using CFC, HCFC or HFC
refrigerants.
Never overfill refrigerant storage cylinders because - ANSWER: the
internal pressure of the cylinders may rise in heated areas and cause an
explosion.
EPA 608 UNIVERSAL TEST EXAM|| 2024-2025
QUESTIONS WITH COMPLETE SOLUTIONS 100%
ALREADY GRADED A+|| ASSURED PASS!!!
Which safety precaution(s) should always be followed - ANSWER:
Never apply an open flame to a refrigerant cylinder; never cut or weld
any refrigerant line when refrigerant is in the line; never use oxygen to
purge lines or to pressurize a system.
In a vapor compression refrigeration system, cooling occurs when -
ANSWER:
refrigerant liquid turns to a vapor.
The evacuation of a system is a method of - ANSWER: dehydration.
Each chlorine atom in the stratosphere can destroy____ozone
molecules -
ANSWER: 100,000
An example of a HFC refrigerant is - ANSWER: R-410A
,2|Page
Which gas(es) would cause the LEAST damage to the environment
during a leak check - ANSWER: dry nitrogen
Refrigerant migrates to the compressor crankcase because of a
difference in______between the refrigerant and the oil - ANSWER:
vapor pressure.
Which refrigerant is an HCFC - ANSWER: R-22, R-123, R-124
It is important not to mix R-22 and R-410A refrigerants in the same
container because - ANSWER: the mixture may be impossible to
reclaim.
When using recover unit, the fill level of the recovery tank can be
controlled by - ANSWER: a mechanical switch; an electronic shut-off
device; weight
Which of the following refrigerant releases is a violation of the EPA
prohibition on venting - ANSWER: release of mixtures of nitrogen and
refrigerant that result from adding nitrogen to a fully charged appliance
to "leak-check" the appliance.
, 3|Page
Which of the following human health effects could result from an
increase in ultraviolet radiation - ANSWER: an increase in cataracts
cases
Never use an open flame to heat a refrigerant tank because - ANSWER:
it can result in venting refrigerant to the atmosphere; the tank may
explode, causing serious injury to people nearby; refrigerant in the tank
may decompose, forming a toxic material.
When transporting cylinders containing used refrigerant, the DOT
requires that you - ANSWER: attach DOT classification tags
According to ASHRAE's 1992 refrigerant safety classification which of
the following designations would be the most safe - ANSWER: A-1
The over-evacuation of a system - ANSWER: does not occur.
Equipment covered by EPA regulations include - ANSWER: all air-
conditioning and refrigeration equipment using CFC, HCFC or HFC
refrigerants.
Never overfill refrigerant storage cylinders because - ANSWER: the
internal pressure of the cylinders may rise in heated areas and cause an
explosion.
