17. The refrigerant blends R-404A and R-410Aae A HFC 25. An agrccmmesa signed br

Question

17. The refrigerant blends R-404A and R-410Aae A HFC 25. An agrccmmesa signed bry the Unised Stanes and he release of C. CFCs D. HCs. depleting velstances with plhave ons dates and production bans is IS, R-507 is an ancoeropic refrigcrant blend. I, the Geneva Convension C the Montreal Probocol. D, the Toronto Conference. 19, R-407C is a near-azeotropic refrigcrant blend 26. Blended refrigeranes whose semperatare glide and fractionation exist so a largee extem than those of a near-ancotropic blend of refrigcrants are n False 20. R-401A, R-402A, R-402B, and R-409A are near- B pure mixtures azeotropic refrigerant blends. - pure compounds True B. False 27. When one or more of the refrigerants in a biend 21. An earth-warming process caused by the atmo- will condense or evaporate at diffierent ranes than the other refrigerants in the same blesd sphere's absorption of heat energy radiated from the earth's surface is A. ozone depletion. B. global warming or the greenhouse effect C. glacial melt. D. All of the above. A. temperature glide B. fractionation C. sublimation D. dehydration 28. When a blend of refrigerants has many different 22. Molecules that contain nothing but hydrogen and temperatures when it evaporates and condenses a a gnen pressure, m _..occurs. carbon are A. hydrocarbon. A. fractionation B. system la C. refrigerant slump D. temperature glide C. chlorofluorocarbon. D. HCFCs 23. The total equivalent warming impact (TEWI effects of refrigerants. 29. A synthetic lubricant used in R-134a refrigeration and air-conditioning systems is A. polyol ester takes into consideration both the direct and indirect A. global warming B. ozone depletion C. poisoning D. smog B. mineral oil. C. crude oil. D. vegetable oil. 30. A synthetic lubricant that works best witlh HCFC-based refrigerant blends in refrigeration applications is A. polyol ester 24. An index that measres the direct effects of global warming creat by chemicals emitted directly into the atmosphere is A. the total equivalent warming impact (TEWI) B. the global warming potential (GWP), C. the Montreal Protocol. D. the greenhouse index B. mineral oil. C. alkylbenzene. D. petroleum oil. 2017 Cenpage Leaming All Rights Reserved. May not he scaneod, cogied or duplicaned. or peoded to a publicty accessible website, in whole or ia part

Explanation / Answer

ANSWERS:

21 GLOBAL WARMIMG OR THE GREEN HOUSE EFFECT(B)

22. HYDROCARBON(A)

23.GLOBAL WARMING (A)

24.GLOBAL WARMING POTENTIAL (B)

25.MONTREAL PROTOCOL(C)

26.QUESTION NOT VISIBLE PROPERLY

27.Fractionation(B)

28.TEMPERATURE GLIDE(D)

29.POLYOL ESTER (A)

30.ALKYLBENZENE(C)

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