EPA 608 Universal Exam Questions and
Answers
Refrigeration technicians who violate the Clean Air Act can: - - ANS-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: - - ANS-recovery and recycling.
Refrigerant that is recovered can be returned to: - - ANS-the same system or other
systems owned by the same person without restriction.
Refrigerant can not be called "reclaimed" unless it: - . - ANS-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: - - ANS-revocation of the technicians certification.
What characteristic(s) of CFCs make them more likely to reach the stratosphere than
most other compounds containing chlorine? - - ANS-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: - - ANS-the vacuum indicator shows you
have reached and held the required finished vacuum.
Disposable refrigerant containers are used for ______ - ANS-virgin refrigerant
Which refrigerant is an HCFC? - - ANS-R-123, R-124, R-22
What statement is true about an azeotropic refrigerant mixture? - - ANS-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? - - ANS-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: - - ANS-0 psig.
, Manifold gauge sets are often color coded, when this is done, the high pressure gauge
is color coded: - Red. - ANS-
In general, blended refrigerants should be charged: - - ANS-as a liquid.
Blended refrigerants leak from a system: - - ANS-in uneven amounts due to different
vapor pressures.
Which of the following gases help form the earth's protective shield? - Stratospheric
Ozone - ANS-
In a refrigerant system, the device that changes a low pressure vapor to a high pressure
vapor is the: - compressor. - ANS-
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; - ANS-
Which atom of the CFC molecule causes ozone depletion? - chlorine - ANS-
The ozone layer protects the earth from: - ultraviolet radiation from the sun. - ANS-
When using with any solvent, cleaner, chemical or refrigerant, you should review: -
material safety data sheets. - ANS-
An award of up to what amount may be paid to a person supplying information that
leads to a penalty against a technician who is intentionally venting? - 10,000 - ANS-
The Montreal Protocol is: - a treaty among nations that controls production of CFCs and
HCFCs. - ANS-
Which refrigerant is an HCFC? - R-123, R-22, R-124 - ANS-
What is one of the most serious results of damage to the ozone layer? - increases in
human skin cancer - ANS-
Of the refrigerants listed below, which has the lowest ozone depletion potential (ODP)?
- R-22 - ANS-
To determine the maximum allowable pressure to use when checking a system, check:
- the design pressure on the equipment nameplate - ANS-
Answers
Refrigeration technicians who violate the Clean Air Act can: - - ANS-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: - - ANS-recovery and recycling.
Refrigerant that is recovered can be returned to: - - ANS-the same system or other
systems owned by the same person without restriction.
Refrigerant can not be called "reclaimed" unless it: - . - ANS-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: - - ANS-revocation of the technicians certification.
What characteristic(s) of CFCs make them more likely to reach the stratosphere than
most other compounds containing chlorine? - - ANS-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: - - ANS-the vacuum indicator shows you
have reached and held the required finished vacuum.
Disposable refrigerant containers are used for ______ - ANS-virgin refrigerant
Which refrigerant is an HCFC? - - ANS-R-123, R-124, R-22
What statement is true about an azeotropic refrigerant mixture? - - ANS-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? - - ANS-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: - - ANS-0 psig.
, Manifold gauge sets are often color coded, when this is done, the high pressure gauge
is color coded: - Red. - ANS-
In general, blended refrigerants should be charged: - - ANS-as a liquid.
Blended refrigerants leak from a system: - - ANS-in uneven amounts due to different
vapor pressures.
Which of the following gases help form the earth's protective shield? - Stratospheric
Ozone - ANS-
In a refrigerant system, the device that changes a low pressure vapor to a high pressure
vapor is the: - compressor. - ANS-
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; - ANS-
Which atom of the CFC molecule causes ozone depletion? - chlorine - ANS-
The ozone layer protects the earth from: - ultraviolet radiation from the sun. - ANS-
When using with any solvent, cleaner, chemical or refrigerant, you should review: -
material safety data sheets. - ANS-
An award of up to what amount may be paid to a person supplying information that
leads to a penalty against a technician who is intentionally venting? - 10,000 - ANS-
The Montreal Protocol is: - a treaty among nations that controls production of CFCs and
HCFCs. - ANS-
Which refrigerant is an HCFC? - R-123, R-22, R-124 - ANS-
What is one of the most serious results of damage to the ozone layer? - increases in
human skin cancer - ANS-
Of the refrigerants listed below, which has the lowest ozone depletion potential (ODP)?
- R-22 - ANS-
To determine the maximum allowable pressure to use when checking a system, check:
- the design pressure on the equipment nameplate - ANS-
