Core (Universal)Câu 26 / 240
A wholesaler offers a technician a low-GWP refrigerant such as R-1234yf. This refrigerant is an example of:
a.A hydrofluoroolefin (HFO) with very low global warming potential
b.A chlorofluorocarbon (CFC)
c.A hydrochlorofluorocarbon (HCFC)
d.A refrigerant with high ozone depletion potential
Giải thích
R-1234yf is a hydrofluoroolefin (HFO), a newer class of refrigerant with zero ozone depletion potential and a very low global warming potential, which is why it is replacing higher-GWP HFCs. It is not a CFC or HCFC and does not deplete ozone. HFOs are mildly flammable (A2L), so technicians must follow the manufacturer's safety guidance.
Luyện miễn phí toàn bộ 240 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- A technician recovers refrigerant from a household window air conditioner (a small appliance) whose compressor still runs. Recovery equipment made after November 15, 1993 must remove at least what percentage of the charge?
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