a unique set of service 23. are set by SAE that (A) J1990. J2843- (B) J2788. (D)
ID: 1767446 • Letter: A
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a unique set of service 23. are set by SAE that (A) J1990. J2843- (B) J2788. (D)J2209. 4R134frefrigerant has a global warm (C) 124. (A) prevent accidental mixing of refrigerants (B) are easier to locate (C) prevent accidental loss of refrigerants. (D) are more cost effective. GWP) of 16. Techaician A sys that R-744 refrigerant is accepted by the (A) 1. EPA as an alternative for retrofit. 4. (D) 1430. Technician B says that R-134a refrigerant is accepted by the EPA as an alternative for retrofit. a5. R-1234yf is a preferred refrigerant over R-134a (A) R-1234yf is highly flammable. (B) R-1234yf has a high GWP C) R-1234yf depletes the ozone layer Who is right? A) A only (C) Both A and IB (B) B only (D) Neither A nor B R-1234yf has a low GWP hat the madinund l2. Technician A says that SAE standard 1ooo spels out details for system design, implementation, and service. Technician B says that SAE standard 3639 specifies refrigerant fitting types and sizes for each refrigerant. non condensable gases In recycled R-134a should not (A)05% by volume. (B) LO%by volume. (C) 1.5% by volume. (D)2.0% by volume. Who is right? 18. When service equipment hoses with manual shutoff yales are not connected to an A/C system, the valves should be in the: CA) A only Both A and B (B) B only ()Neither A nor B (A) mid-seated position. (B) back-seated position. (C) closed position. (D) open position. 27. Servicing MVAC systems on hybrid and electric vehicles requires: (A) an electronie leak detector dedicated to hybrid electric vehicle MVAC systems. (B) following J1989 for refrigerant recovery (C) service fittings specially designed for hybrid a 19. Technician A says that R-1234yf may be used to retrofit an R-134a system. Technician B says that R-1234yf is an ozone-depleting gas. Who is right? electric vehicle MVAC systems voltage system prior to service. 28. Technician A says that anyone servicing MVAC syst (C) Both A and B (D) Neither A nor B Aonly (B) B only for hire must be trained and certified. Technician B says that each piece of refrigerant handling equipment that is used to service motor vehicle air conditioners must be approved and 20. A technician who successfully completes the training and oertification in an EPA-approved Section 609 program can legally service MVAC systems that use any of these refrigerants EXCEPT certified. (A) R-22. (C) R-1234yf (B) R-12. (D) R-134a. Who is right? 21 Electronic leak detectors for R-1234yf should meet: (A) A only (B) B only (C) Both A and B (D) Neither A nor B (A) J2297 (B) J2298. J2913. (D) J1628. 29. Which of these is á flammable refrigerant, unaco under SNAP as a substitute for CFC-12? 22. Technicians servicing an MVAC system should do any of HC-12a (B) R406A these EXCEPT (D) GHG-X4 (A) store refrigerant in a disposable container (B) wear safety goggles. (C) avoid direct contact with the refrigerant. (D) work in a well-ventilated area. 30. Empty disposable R-134a refrigerant containe CA) disposed of according to J2196. (B) evacuated into a recovery/recycling r (C) flushed with R-152a refrigerant. (D) flushed with R-134a refrigerant. RR921PEExplanation / Answer
15. A- Each new refrigerant must be used with a unique set of fittings to prevent the accidental mixing of different refrigerants.
16. A -Under the Significant New Alternatives Policy (SNAP) programme, the US Environmental Protection Agency (EPA) has published a final rule listing R744 as an acceptable substitute for ozone-depleting substances in new motor vehicle air conditioning (MVAC) systems subject to use conditions for its safe use.
17. C
18. A
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