EPA 608 CORE UNIVERSAL EXAM 2025 WITH
100% ACCURATE SOLUTIONS
Refrigeration technicians who violate the Clean Air Act can: - ✅✅✅CORRECT -D) all of the above.
After 1995, any supplies of CFC refrigerant to service existing units in the USA can only come from: -
✅✅✅CORRECT -A) recovery and recycling.
Refrigerant that is recovered can be returned to: - ✅✅✅CORRECT -A) the same system or other
systems owned by the same person without restriction.
Refrigerant can not be called "reclaimed" unless it: - ✅✅✅CORRECT -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 -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 -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 -A) the vacuum indicator shows you have
reached and held the required finished vacuum.
Disposable refrigerant containers are used for _______ refrigerant. - ✅✅✅CORRECT -C) virgin
Which refrigerant is an HCFC? - ✅✅✅CORRECT -A) R-124
, What statement is true about an azeotropic refrigerant mixture? - ✅✅✅CORRECT -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 -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 -A) 0 psig.
Manifold gauge sets are often color coded, when this is done, the high pressure gauge is color coded: -
✅✅✅CORRECT -A) red.
In general, blended refrigerants should be charged: - ✅✅✅CORRECT -C) as a liquid.
Blended refrigerants leak from a system: - ✅✅✅CORRECT -B) in uneven amounts due to different
vapor pressures.
Which of the following gases help form the earth's protective shield? - ✅✅✅CORRECT -D)
Stratospheric Ozone
In a refrigeration system, the device that changes a low pressure vapor to a high pressure vapor is the: -
✅✅✅CORRECT -C) compressor.
. Data shows that chlorine in the stratosphere comes mainly from CFCs rather than from natural sources
such as volcanoes because: - ✅✅✅CORRECT -D) All of the above.
Which atom of the CFC molecule causes ozone depletion? - ✅✅✅CORRECT -B) chlorine
The ozone layer protects the earth from: - ✅✅✅CORRECT -C) ultraviolet radiation from the sun.
When using with any solvent, cleaner, chemical or refrigerant, you should review: - ✅✅✅CORRECT -
C) material safety data sheets.
100% ACCURATE SOLUTIONS
Refrigeration technicians who violate the Clean Air Act can: - ✅✅✅CORRECT -D) all of the above.
After 1995, any supplies of CFC refrigerant to service existing units in the USA can only come from: -
✅✅✅CORRECT -A) recovery and recycling.
Refrigerant that is recovered can be returned to: - ✅✅✅CORRECT -A) the same system or other
systems owned by the same person without restriction.
Refrigerant can not be called "reclaimed" unless it: - ✅✅✅CORRECT -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 -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 -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 -A) the vacuum indicator shows you have
reached and held the required finished vacuum.
Disposable refrigerant containers are used for _______ refrigerant. - ✅✅✅CORRECT -C) virgin
Which refrigerant is an HCFC? - ✅✅✅CORRECT -A) R-124
, What statement is true about an azeotropic refrigerant mixture? - ✅✅✅CORRECT -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 -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 -A) 0 psig.
Manifold gauge sets are often color coded, when this is done, the high pressure gauge is color coded: -
✅✅✅CORRECT -A) red.
In general, blended refrigerants should be charged: - ✅✅✅CORRECT -C) as a liquid.
Blended refrigerants leak from a system: - ✅✅✅CORRECT -B) in uneven amounts due to different
vapor pressures.
Which of the following gases help form the earth's protective shield? - ✅✅✅CORRECT -D)
Stratospheric Ozone
In a refrigeration system, the device that changes a low pressure vapor to a high pressure vapor is the: -
✅✅✅CORRECT -C) compressor.
. Data shows that chlorine in the stratosphere comes mainly from CFCs rather than from natural sources
such as volcanoes because: - ✅✅✅CORRECT -D) All of the above.
Which atom of the CFC molecule causes ozone depletion? - ✅✅✅CORRECT -B) chlorine
The ozone layer protects the earth from: - ✅✅✅CORRECT -C) ultraviolet radiation from the sun.
When using with any solvent, cleaner, chemical or refrigerant, you should review: - ✅✅✅CORRECT -
C) material safety data sheets.
