EPA 608 UNIVERSAL, EPA 608 CERTIFICATION, SKILLCAT EPA 608 TEST COMBINED ALL EXAM QUESTIONS WITH CORRECT ANSWERS 2025

EPA 608 UNIVERSAL, EPA 608 CERTIFICATION, SKILLCAT EPA 608 TEST COMBINED ALL EXAM QUESTIONS WITH CORRECT ANSWERS 2025 Epa 608 universal [ANSWERED] EPA 608 Certification [ANSWERED] SkillCat EPA 608 [ANSWERED] Refrigeration technicians who violate the Clean Air Act can: - 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: - recovery and recycling. Refrigerant that is recovered can be returned to: - the same system or other systems owned by the same person without restriction. Refrigerant can not be called "reclaimed" unless it: - . 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: - revocation of the technicians certification. What characteristic(s) of CFCs make them more likely to reach the stratosphere than most other compounds containing chlorine? - 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: - the vacuum indicator shows you have reached and held the required finished vacuum. Disposable refrigerant containers are used for ______ virgin refrigerant Which refrigerant is an HCFC? - R-123, R-124, R-22 What statement is true about an azeotropic refrigerant mixture? - 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? - 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: - 0 psig. Manifold gauge sets are often color coded, when this is done, the high pressure gauge is color coded: - Red. In general, blended refrigerants should be charged: - as a liquid. Blended refrigerants leak from a system: - in uneven amounts due to different vapor pressures. Which of the following gases help form the earth's protective shield? - Stratospheric Ozone In a refrigerant system, the device that changes a low pressure vapor to a high pressure vapor is the: - compressor. 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; Which atom of the CFC molecule causes ozone depletion? - chlorine The ozone layer protects the earth from: - ultraviolet radiation from the sun. When using with any solvent, cleaner, chemical or refrigerant, you should review: - material safety data sheets. 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 The Montreal Protocol is: - a treaty among nations that controls production of CFCs and HCFCs. Which refrigerant is an HCFC? - R-123, R-22, R-124 What is one of the most serious results of damage to the ozone layer? - increases in human skin cancer Of the refrigerants listed below, which has the lowest ozone depletion potential (ODP)? - R-22 To determine the maximum allowable pressure to use when checking a system, check: - the design pressure on the equipment nameplate Ozone depletion potential, or "ODP," is: - A measure of the ability of CFCs and HCFCs to destroy ozone. An example of an HFC refrigerant is: - R-134a Whenever dry nitrogen from a portable cylinder is connected to a system, what item is of most importance in consideration of safety? - There is relief in the downstream line from the pressure regulator. During servicing of a refrigeration system containing R-12, the refrigerant must be: - recovered. Which safety precaution(s) should always be followed: - Never apply an open flame to a refrigerant cylinder; never cut or weld any refrigerant line when refrigerant is in the line; never use oxygen to purge lines or to pressurize a system. In a vapor compression refrigeration system, cooling occurs when: - refrigerant liquid turns to a vapor. The evacuation of a system is a method of: - dehydration. Each chlorine atom in the stratosphere can destroy____ozone molecules. - 100,000 An example of a HFC refrigerant is: - R-410A Which gas(es) would cause the LEAST damage to the environment during a leak check? - dry nitrogen Refrigerant migrates to the compressor crankcase because of a difference in______between the refrigerant and the oil. - vapor pressure. Which refrigerant is an HCFC? - R-22, R-123, R-124 It is important not to mix R-22 and R-410A refrigerants in the same container because: - the mixture may be impossible to reclaim. When using recover unit, the fill level of the recovery tank can be controlled by: - a mechanical switch; an electronic shut-off device; weight Which of the following refrigerant releases is a violation of the EPA prohibition on venting? - release of mixtures of nitrogen and refrigerant that result from adding nitrogen to a fully charged appliance to "leak-check" the appliance. Which of the following human health effects could result from an increase in ultraviolet radiation? - an increase in cataracts cases Never use an open flame to heat a refrigerant tank because: - it can result in venting refrigerant to the atmosphere; the tank may explode, causing serious injury to people nearby; refrigerant in the tank may decompose, forming a toxic material. When transporting cylinders containing used refrigerant, the DOT requires that you: - attach DOT classification tags According to ASHRAE's 1992 refrigerant safety classification which of the following designations would be the most safe? - A-1