epa 608 universal questions with solutions
Refrigeration technicians who violate the Clean Air Act can: - - answersLose their EPA certification, be fined, be o.c o.c o.c o.c o.c o.c o.c o.c o.c o.c o.c o.c o.c o.c o.c o .c o.c
required to appear in Federal court.
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After 1995, any supplies of CFC refrigerants to service existing units in the USA can only come from: - -
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answersrecovery and recycling.
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Refrigerant that is recovered can be returned to: - - answersthe same system or other systems owned by the sameo.c o .c o.c o.c o .c o.c o .c o.c o.c o.c o.c o.c o.c o .c o.c o.c o.c o.c o.c
person without restriction.
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Refrigerant can not be called "reclaimed" unless it: - . - answershas been chemically analyzed and the refrigerant
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meets the ARI-700 standard.
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The EPA can require a technician to demonstrate their ability to perform proper procedures for recovering and/or
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recycling refrigerant. Failure to demonstrate competency can result in: - - answersrevocation of the technicians
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certification.
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What characteristic(s) of CFCs make them more likely to reach the stratosphere than most other compounds
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containing chlorine? - - answersRefrigerants that contain chlorine but not hydrogen are so stable that they do not
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break down in the lower atmosphere after being released. The chlorine or bromine reacts with the ozone, causing
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it to change back to oxygen, thus destroying the ozone layer.
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A system is considered dehydrated when: - - answersthe vacuum indicator shows you have reached and held the
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required finished vacuum.
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Disposable refrigerant containers are used for ______ - answersvirgin refrigerant o.c o.c o.c o .c o.c o.c o .c o.c o .c
Which refrigerant is an HCFC? - - answersR-123, R-124, R-22
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What statement is true about an azeotropic refrigerant mixture? - - answersIt is a mixture that acts like a single-
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component refrigerant over its entire range. o.c o.c o.c o.c o.c
Chlorofluorocarbos (CFCs) and hydrochlorofluorocarbons (HCFCs) have which of the following in common? - - o.c o.c o.c o .c o.c o.c o.c o.c o.c o.c o.c o.c o.c
answersIt is a mixture that acts like a single-component refrigerant over its entire range.
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To scrap a disposable cylinder, the internal cylinder pressure should be reduced to at least: - - answers0 psig.
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Manifold gauge sets are often color coded, when this is done, the high pressure gauge is color coded: - Red. -
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answers
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In general, blended refrigerants should be charged: - - answersas a liquid.
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Blended refrigerants leak from a system: - - answersin uneven amounts due to different vapor pressures.
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Which of the following gases help form the earth's protective shield? - Stratospheric Ozone - answers
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, In a refrigerant system, the device that changes a low pressure vapor to a high pressure vapor is the: -
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compressor. - answers
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Data shows that chlorine in the stratosphere comes mainly from CFCs rather than from natural sources such as
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volcanoes because: - The rise in the amount of chlorine in the stratosphere matches the rise in the amount of
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fluorine, which has different natural sources than chlorine; The rise in the amount of chlorine in the stratosphere
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matches the rise in CFC emissions; Air samples taken from the stratosphere over erupting volcanoes show that
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volcanoes contribute a small quantity of chlorine to the stratosphere when compared to CFCs; - answers
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Which atom of the CFC molecule causes ozone depletion? - chlorine - answers
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The ozone layer protects the earth from: - ultraviolet radiation from the sun. - answers
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When using with any solvent, cleaner, chemical or refrigerant, you should review: - material safety data sheets. -
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answers
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An award of up to what amount may be paid to a person supplying information that leads to a penalty against a
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technician who is intentionally venting? - 10,000 - answers
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The Montreal Protocol is: - a treaty among nations that controls production of CFCs and HCFCs. - answers
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Which refrigerant is an HCFC? - R-123, R-22, R-124 - answers o.c o.c o.c o.c o.c o.c o.c o.c o.c o.c
What is one of the most serious results of damage to the ozone layer? - increases in human skin cancer - answers
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Of the refrigerants listed below, which has the lowest ozone depletion potential (ODP)? - R-22 - answers
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To determine the maximum allowable pressure to use when checking a system, check: - the design pressure on
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the equipment nameplate - answers
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Ozone depletion potential, or "ODP," is: - A measure of the ability of CFCs and HCFCs to destroy ozone. - answers
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An example of an HFC refrigerant is: - R-134a - answers
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Whenever dry nitrogen from a portable cylinder is connected to a system, what item is of most importance in
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consideration of safety? - There is relief in the downstream line from the pressure regulator. - answers
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During servicing of a refrigeration system containing R-12, the refrigerant must be: - recovered. - answers
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Which safety precaution(s) should always be followed: - Never apply an open flame to a refrigerant cylinder; never
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cut or weld any refrigerant line when refrigerant is in the line; never use oxygen to purge lines or to pressurize a
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system. - answers
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In a vapor compression refrigeration system, cooling occurs when: - refrigerant liquid turns to a vapor. - answers
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The evacuation of a system is a method of: - dehydration. - answers
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Each chlorine atom in the stratosphere can destroy____ozone molecules. - 100,000 - answers
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An example of a HFC refrigerant is: - R-410A - answers
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Which gas(es) would cause the LEAST damage to the environment during a leak check? - dry nitrogen - answers
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Refrigeration technicians who violate the Clean Air Act can: - - answersLose their EPA certification, be fined, be o.c o.c o.c o.c o.c o.c o.c o.c o.c o.c o.c o.c o.c o.c o.c o .c o.c
required to appear in Federal court.
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After 1995, any supplies of CFC refrigerants to service existing units in the USA can only come from: - -
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answersrecovery and recycling.
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Refrigerant that is recovered can be returned to: - - answersthe same system or other systems owned by the sameo.c o .c o.c o.c o .c o.c o .c o.c o.c o.c o.c o.c o.c o .c o.c o.c o.c o.c o.c
person without restriction.
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Refrigerant can not be called "reclaimed" unless it: - . - answershas been chemically analyzed and the refrigerant
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meets the ARI-700 standard.
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The EPA can require a technician to demonstrate their ability to perform proper procedures for recovering and/or
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recycling refrigerant. Failure to demonstrate competency can result in: - - answersrevocation of the technicians
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certification.
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What characteristic(s) of CFCs make them more likely to reach the stratosphere than most other compounds
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containing chlorine? - - answersRefrigerants that contain chlorine but not hydrogen are so stable that they do not
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break down in the lower atmosphere after being released. The chlorine or bromine reacts with the ozone, causing
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it to change back to oxygen, thus destroying the ozone layer.
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A system is considered dehydrated when: - - answersthe vacuum indicator shows you have reached and held the
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required finished vacuum.
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Disposable refrigerant containers are used for ______ - answersvirgin refrigerant o.c o.c o.c o .c o.c o.c o .c o.c o .c
Which refrigerant is an HCFC? - - answersR-123, R-124, R-22
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What statement is true about an azeotropic refrigerant mixture? - - answersIt is a mixture that acts like a single-
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component refrigerant over its entire range. o.c o.c o.c o.c o.c
Chlorofluorocarbos (CFCs) and hydrochlorofluorocarbons (HCFCs) have which of the following in common? - - o.c o.c o.c o .c o.c o.c o.c o.c o.c o.c o.c o.c o.c
answersIt is a mixture that acts like a single-component refrigerant over its entire range.
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To scrap a disposable cylinder, the internal cylinder pressure should be reduced to at least: - - answers0 psig.
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Manifold gauge sets are often color coded, when this is done, the high pressure gauge is color coded: - Red. -
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answers
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In general, blended refrigerants should be charged: - - answersas a liquid.
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Blended refrigerants leak from a system: - - answersin uneven amounts due to different vapor pressures.
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Which of the following gases help form the earth's protective shield? - Stratospheric Ozone - answers
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, In a refrigerant system, the device that changes a low pressure vapor to a high pressure vapor is the: -
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compressor. - answers
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Data shows that chlorine in the stratosphere comes mainly from CFCs rather than from natural sources such as
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volcanoes because: - The rise in the amount of chlorine in the stratosphere matches the rise in the amount of
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fluorine, which has different natural sources than chlorine; The rise in the amount of chlorine in the stratosphere
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matches the rise in CFC emissions; Air samples taken from the stratosphere over erupting volcanoes show that
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volcanoes contribute a small quantity of chlorine to the stratosphere when compared to CFCs; - answers
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Which atom of the CFC molecule causes ozone depletion? - chlorine - answers
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The ozone layer protects the earth from: - ultraviolet radiation from the sun. - answers
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When using with any solvent, cleaner, chemical or refrigerant, you should review: - material safety data sheets. -
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answers
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An award of up to what amount may be paid to a person supplying information that leads to a penalty against a
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technician who is intentionally venting? - 10,000 - answers
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The Montreal Protocol is: - a treaty among nations that controls production of CFCs and HCFCs. - answers
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Which refrigerant is an HCFC? - R-123, R-22, R-124 - answers o.c o.c o.c o.c o.c o.c o.c o.c o.c o.c
What is one of the most serious results of damage to the ozone layer? - increases in human skin cancer - answers
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Of the refrigerants listed below, which has the lowest ozone depletion potential (ODP)? - R-22 - answers
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To determine the maximum allowable pressure to use when checking a system, check: - the design pressure on
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the equipment nameplate - answers
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Ozone depletion potential, or "ODP," is: - A measure of the ability of CFCs and HCFCs to destroy ozone. - answers
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An example of an HFC refrigerant is: - R-134a - answers
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Whenever dry nitrogen from a portable cylinder is connected to a system, what item is of most importance in
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consideration of safety? - There is relief in the downstream line from the pressure regulator. - answers
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During servicing of a refrigeration system containing R-12, the refrigerant must be: - recovered. - answers
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Which safety precaution(s) should always be followed: - Never apply an open flame to a refrigerant cylinder; never
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cut or weld any refrigerant line when refrigerant is in the line; never use oxygen to purge lines or to pressurize a
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system. - answers
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In a vapor compression refrigeration system, cooling occurs when: - refrigerant liquid turns to a vapor. - answers
o.c o.c o.c o.c o .c o.c o.c o.c o.c o.c o.c o .c o.c o.c o .c o.c o.c
The evacuation of a system is a method of: - dehydration. - answers
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Each chlorine atom in the stratosphere can destroy____ozone molecules. - 100,000 - answers
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An example of a HFC refrigerant is: - R-410A - answers
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Which gas(es) would cause the LEAST damage to the environment during a leak check? - dry nitrogen - answers
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