EPA 608 Core Universal ACTUAL
QUESTIONS AND CORRECT ANSWERS
Refrigeration technicians who violate the Clean Air Act can: - CORRECT
ANSWERS✅✅D) all of the above.
After 1995, any supplies of CFC refrigerant to service existing units in the USA can only
come from: - CORRECT ANSWERS✅✅A) recovery and recycling.
Refrigerant that is recovered can be returned to: - CORRECT ANSWERS✅✅A) the same
system or other systems owned by the same person without restriction.
Refrigerant can not be called "reclaimed" unless it: - CORRECT ANSWERS✅✅B) has been
chemically analyzed and the refrigerant meets the ARI-700 purity 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 ANSWERS✅✅A) revocation of the technician's certification.
What characteristic(s) of CFCs make them more likely to reach the stratosphere than most
other compounds containing chlorine? - CORRECT ANSWERS✅✅A) 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 ozone, causing it to
change back to oxygen, thus destroying the ozone layer.
A system is considered dehydrated when: - CORRECT ANSWERS✅✅A) the vacuum
indicator shows you have reached and held the required finished vacuum.
Disposable refrigerant containers are used for _______ refrigerant. - CORRECT
ANSWERS✅✅C) virgin
Which refrigerant is an HCFC? - CORRECT ANSWERS✅✅A) R-124
, What statement is true about an azeotropic refrigerant mixture? - CORRECT
ANSWERS✅✅D) It is a mixture that acts like a single-component refrigerant over its entire
range.
Chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs) have which of the
following in common? - CORRECT ANSWERS✅✅D) They must be recovered before
opening or disposing of appliances.
To scrap a disposable cylinder, the internal cylinder pressure should be reduced to at least: -
CORRECT ANSWERS✅✅A) 0 psig.
Manifold gauge sets are often color coded, when this is done, the high pressure gauge is color
coded: - CORRECT ANSWERS✅✅A) red.
In general, blended refrigerants should be charged: - CORRECT ANSWERS✅✅C) as a
liquid.
Blended refrigerants leak from a system: - CORRECT ANSWERS✅✅B) in uneven amounts
due to different vapor pressures.
Which of the following gases help form the earth's protective shield? - CORRECT
ANSWERS✅✅D) Stratospheric Ozone
In a refrigeration system, the device that changes a low pressure vapor to a high pressure
vapor is the: - CORRECT ANSWERS✅✅C) compressor.
. Data shows that chlorine in the stratosphere comes mainly from CFCs rather than from
natural sources such as volcanoes because: - CORRECT ANSWERS✅✅D) All of the
above.
Which atom of the CFC molecule causes ozone depletion? - CORRECT ANSWERS✅✅B)
chlorine
QUESTIONS AND CORRECT ANSWERS
Refrigeration technicians who violate the Clean Air Act can: - CORRECT
ANSWERS✅✅D) all of the above.
After 1995, any supplies of CFC refrigerant to service existing units in the USA can only
come from: - CORRECT ANSWERS✅✅A) recovery and recycling.
Refrigerant that is recovered can be returned to: - CORRECT ANSWERS✅✅A) the same
system or other systems owned by the same person without restriction.
Refrigerant can not be called "reclaimed" unless it: - CORRECT ANSWERS✅✅B) has been
chemically analyzed and the refrigerant meets the ARI-700 purity 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 ANSWERS✅✅A) revocation of the technician's certification.
What characteristic(s) of CFCs make them more likely to reach the stratosphere than most
other compounds containing chlorine? - CORRECT ANSWERS✅✅A) 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 ozone, causing it to
change back to oxygen, thus destroying the ozone layer.
A system is considered dehydrated when: - CORRECT ANSWERS✅✅A) the vacuum
indicator shows you have reached and held the required finished vacuum.
Disposable refrigerant containers are used for _______ refrigerant. - CORRECT
ANSWERS✅✅C) virgin
Which refrigerant is an HCFC? - CORRECT ANSWERS✅✅A) R-124
, What statement is true about an azeotropic refrigerant mixture? - CORRECT
ANSWERS✅✅D) It is a mixture that acts like a single-component refrigerant over its entire
range.
Chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs) have which of the
following in common? - CORRECT ANSWERS✅✅D) They must be recovered before
opening or disposing of appliances.
To scrap a disposable cylinder, the internal cylinder pressure should be reduced to at least: -
CORRECT ANSWERS✅✅A) 0 psig.
Manifold gauge sets are often color coded, when this is done, the high pressure gauge is color
coded: - CORRECT ANSWERS✅✅A) red.
In general, blended refrigerants should be charged: - CORRECT ANSWERS✅✅C) as a
liquid.
Blended refrigerants leak from a system: - CORRECT ANSWERS✅✅B) in uneven amounts
due to different vapor pressures.
Which of the following gases help form the earth's protective shield? - CORRECT
ANSWERS✅✅D) Stratospheric Ozone
In a refrigeration system, the device that changes a low pressure vapor to a high pressure
vapor is the: - CORRECT ANSWERS✅✅C) compressor.
. Data shows that chlorine in the stratosphere comes mainly from CFCs rather than from
natural sources such as volcanoes because: - CORRECT ANSWERS✅✅D) All of the
above.
Which atom of the CFC molecule causes ozone depletion? - CORRECT ANSWERS✅✅B)
chlorine
