Core (Universal)Câu 17 / 240
A technician services a large centrifugal chiller that uses R-123, a low-pressure refrigerant. Which certification type is required?
a.Type II
b.Type III
c.Type I
d.Any certification, because low-pressure systems are exempt
Giải thích
Type III certification is required to service or dispose of low-pressure appliances such as R-123 and R-11 centrifugal chillers, which operate below atmospheric pressure. Type I covers small appliances and Type II covers high-pressure systems, and low-pressure systems are not exempt. A Universal certification would also qualify because it includes Type III.
Trích dẫn luật: 40 CFR §82.161Luyện miễn phí toàn bộ 240 câu hỏi — không cần đăng ký.
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