TheoryEPA Section 608 Refrigerant Practice Test Video
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Q1Under Section 608 of the Clean Air Act, knowingly releasing (venting) refrigerant while servicing an appliance is:
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✓ Correct answer: Prohibited
Section 608 prohibits the knowing release of refrigerant during the maintenance, service, repair, or disposal of appliances. The venting prohibition applied to CFCs and HCFCs starting July 1, 1992, and to most substitutes (including HFCs) starting November 15, 1995.
Q2Which class of refrigerants contains chlorine and has the highest ozone-depletion potential?
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✓ Correct answer: CFCs
Chlorofluorocarbons (CFCs) such as R-11 and R-12 are fully halogenated and contain chlorine, giving them the highest ozone-depletion potential. They have been phased out under the Montreal Protocol.
Q3Which statement best describes an HFC refrigerant such as R-134a?
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✓ Correct answer: Contains no chlorine and has zero ozone-depletion potential
HFCs (hydrofluorocarbons) contain no chlorine, so their ozone-depletion potential is zero. They do, however, have a global-warming potential, which is why their use is also being managed.
Q4What does the chlorine released from CFCs and HCFCs do in the stratosphere?
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✓ Correct answer: Destroys ozone molecules
Once chlorine reaches the stratosphere, a single chlorine atom can destroy many ozone molecules in a repeating catalytic cycle, thinning the ozone layer that shields the Earth from ultraviolet radiation.
Q5The 'three R's' of refrigerant management are:
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✓ Correct answer: Recover, recycle, reclaim
Recover means to remove refrigerant and store it externally. Recycle means to clean it for reuse on site (oil separation, single or multiple passes). Reclaim means to reprocess it to meet the ARI/AHRI 700 new-product specification, which requires laboratory analysis.
Q6Which term means cleaning recovered refrigerant for on-site reuse using oil separation and filtration, without testing it to a purity specification?
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✓ Correct answer: Recycle
Recycling cleans refrigerant for reuse on the same site through oil separation and one or more passes through filter-driers. Unlike reclaiming, it does not require chemical analysis to a purity standard.
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