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epa 608 universal questions and answers.
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epa 608 universal questions and answers.
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epa 608 universal questions andanswers
Refrigeration technicians who violate the Clean Air Act can: - - (correct answer) -Lose their EPA
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certification, be fined, be 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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- (correct answer) -recovery and recycling.
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Refrigerant that is recovered can be returned to: - - (correct answer) -the same system or other
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systems owned by the same person without restriction.
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Refrigerant can not be called "reclaimed" unless it: - . - (correct answer) -has been chemically
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analyzed and the refrigerant meets the ARI-700 standard.
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The EPA can require a technician to demonstrate their ability to perform proper procedures for
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recovering and/or recycling refrigerant. Failure to demonstrate competency can result in: - - (correct
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answer) -revocation of the technicians certification.
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What characteristic(s) of CFCs make them more likely to reach the stratosphere than most other
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compounds containing chlorine? - - (correct answer) -Refrigerants that contain chlorine but not
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hydrogen are so stable that they do not break down in the lower atmosphere after being released.
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The chlorine or bromine reacts with the ozone, causing it to change back to oxygen, thus destroying
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the ozone layer.
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A system is considered dehydrated when: - - (correct answer) -the vacuum indicator shows you have
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reached and held the required finished vacuum.
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Disposable refrigerant containers are used for ______ - (correct answer) -virgin refrigerant
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Which refrigerant is an HCFC? - - (correct answer) -R-123, R-124, R-22
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, What statement is true about an azeotropic refrigerant mixture? - - (correct answer) -It is a mixture
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that acts like a single-component refrigerant over its entire range.
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Chlorofluorocarbos (CFCs) and hydrochlorofluorocarbons (HCFCs) have which of the following in n/ n/ n/ n/ n/ n/ n/ n/ n/ n/
common? - - (correct answer) -It is a mixture that acts like a single-component refrigerant over its
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entire range.
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To scrap a disposable cylinder, the internal cylinder pressure should be reduced to at least: - -
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(correct answer) -0 psig.
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Manifold gauge sets are often color coded, when this is done, the high pressure gauge is color coded:
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- Red. - (correct answer) -
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In general, blended refrigerants should be charged: - - (correct answer) -as a liquid.
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Blended refrigerants leak from a system: - - (correct answer) -in uneven amounts due to different
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vapor pressures.
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Which of the following gases help form the earth's protective shield? - Stratospheric Ozone - (correct
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answer) -
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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. - (correct answer) -
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Data shows that chlorine in the stratosphere comes mainly from CFCs rather than from natural
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sources such as volcanoes because: - The rise in the amount of chlorine in the stratosphere matches
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the rise in the amount of fluorine, which has different natural sources than chlorine; The rise in the
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amount of chlorine in the stratosphere matches the rise in CFC emissions; Air samples taken from
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the stratosphere over erupting volcanoes show that volcanoes contribute a small quantity of chlorine
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to the stratosphere when compared to CFCs; - (correct answer) -
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Which atom of the CFC molecule causes ozone depletion? - chlorine - (correct answer) -
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