Study guides, Class notes & Summaries

EPA 608 (TYPE II) Exam Questions And Answers When a new system has been assembled, the first thing to do is? - Pressurize the system with an inert gas & leak check. After installation of a field-piped R-410A split heat pump, the unit should first be? - Pressurized with nitrogen then leak checked. The EPA regulations require that any appliances containing more than 50 pounds of refrigerant (except for commercial & industrial process refrigeration) must be repaired when the leak rate exc...

EPA Section 608 Technician Certification Study Guide Questions And Answers` What are the typical uses of the center port of a gauge set? - Used during evacuation, charging and recovery procedures. What color are the gauges on a manifold gauge set? - Low pressure is blue, High pressure is red. What are the typical ranges of pressure measurements used on the gauges of a manifold gauge set? - High side is 0 to 500 PSIG; Low side is 0 to 350 PSIG and 0 to 30 in. Hg below atmospheric press...

EPA 608 Universal Exam Questions And Answers Refrigeration technicians who violate the Clean Air Act can: - - ANS 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: - - ANS recovery and recycling. Refrigerant that is recovered can be returned to: - - ANS the same system or other systems owned by the same person without restriction. Refrigerants ca...

EPA 608 9th edition Exam Questions And Answers Reusable refrigerant containers under high-pressure must be hydrostatically tested how often? - ANS 5 years How much can a person be fined per day per violation for knowingly releasing a regulated substance that violates the Clean Air Act? - ANS $44,539 HCFCs contain - ANS Hydrogen, Chlorine, Fluorine, and Carbon Which of the following refrigerants is an HFO? - ANS R-1234ze An ozone molecule contains; - ANS Three oxygen atom...

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 "rec...

Before charging a new system with refrigerant, what should be done? - Correct Answer Pressurize with nitrogen (classified as an inert gas) and leak Which refrigerant can be used for leak detection as a trace gas and pressurized with nitrogen? - Correct Answer R-22 What tools can you use to find general area of leaks and pinpoint leaks? a. Soap bubbles. b. Look for oil residue c. Electronic or ultrasonic leak detector will provide the general area of the leak d. Refrigerant dye - Co...

What is a blend of two or more components who's equilibrium vapor phase & liquid phase compositions are the same at a given pressure? - Answer- Azeotrope This is a halogenated hydrocarbon containing one or more of the three halogens: fluorine, chlorine, and bromine - Answer- Halocarbon Chlorofluorocarbons (CFCs) consist of? - Answer- Chlorine, fluorine, carbon CFCs are chemically very stable because they contain no? - Answer- Hydrogen CFCs are damaging to what layer of the ozone lay...

The state of the refrigerant entering the metering device is? - answer-a subcooled high pressure liquid. What type of refrigerant is used in very high-pressure appliances? - answer-r-503 What type of refrigerant is used in medium pressure appliances? - answer-r-500 What type of refrigerant is used in high pressure appliances? - answer-r-410a and r-22 What device is located at the end of the liquid line? - answer-the expansion device. What type of refrigerants are the least harmful...

Ozone depletion is caused by _______ in HFC refrigerants. - Answer-chlorine CFCs and HCFCs ________ making them capable capable of reaching the stratospheric ozone layer. - Answer-do not dissolve in water or easily break down in the atmosphere According to the Rolanda-Molina theory, ________ are destroyed by each chlorine atom in the stratosphere. - Answer-100,000 ozone molecules The stratospheric ozone layer protects us from _______. - Answer-ultraviolet radiation from the sun Which...

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