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EPA 608 Universal Exam With 100 Correct Answers 2023
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get the pdf at;https://learnexams.com/search/study?query= • Instagram: https://www.instagram.com/learnexams/ • https://learnexams.com/search/study?query= • ..#learnexams2023#learnexams.com#learnexams2024 • .EPA 608 Universal Exam With 100% • Correct Answers 2023 • Refrigeration technicians who violate the Clean Air Act can: - - Correct answer-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: - - Correct answer-recovery and recycling. • Refrigerant that is recovered can be returned to: - - Correct answer-the same system or • other systems owned by the same person without restriction. • Refrigerant can not be called reclaimed unless it: - . - Correct answer-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: - - Correct answer-revocation of the technicians certification. • What characteristic(s) of CFCs make them more likely to reach the stratosphere than • most other compounds containing chlorine? - - Correct answer-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: - - Correct answer-the vacuum indicator • shows you have reached and held the required finished vacuum. • Disposable refrigerant containers are used for ______ - Correct answer-virgin • refrigerant • Which refrigerant is an HCFC? - - Correct answer-R-123, R-124, R-22 • What statement is true about an azeotropic refrigerant mixture? - - Correct answer-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? - - Correct answer-It is a mixture that acts like a singlecomponent refrigerant over its entire range. • To scrap a disposable cylinder, the internal cylinder pressure should be reduced to at • least: - - Correct answer-0 psig. • Manifold gauge sets are often color coded, when this is done, the high pressure gauge • is color coded: - Red. - Correct answerIn general, blended refrigerants should be charged: - - Correct answer-as a liquid. • Blended refrigerants leak from a system: - - Correct answer-in uneven amounts due to • different vapor pressures. • Which of the following gases help form the earth's protective shield? - Stratospheric • Ozone - Correct answerIn a refrigerant system, the device that changes a low pressure vapor to a high pressure • vapor is the: - compressor. - Correct answerData 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; - Correct answerWhich atom of the CFC molecule causes ozone depletion? - chlorine - Correct answerThe ozone layer protects the earth from: - ultraviolet radiation from the sun. - Correct • answerWhen using with any solvent, cleaner, chemical or refrigerant, you should review: - • material safety data sheets. - Correct answerAn 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 - Correct • answerThe Montreal Protocol is: - a treaty among nations that controls production of CFCs and • HCFCs. - Correct answerWhich refrigerant is an HCFC? - R-123, R-22, R-124 - Correct answerWhat is one of the most serious results of damage to the ozone layer? - increases in • human skin cancer - Correct answerOf the refrigerants listed below, which has the lowest ozone depletion potential (ODP)? • R-22 - Correct answer • . • . • . • . • . • . • . • . • . • .
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