Regulations & SafetyCâu 72 / 240
A technician notices a disposable refrigerant cylinder labeled 'DOT-39.' What does this designation mean for handling?
a.It may be refilled up to five times
b.It must be hydrostatically retested every 5 years
c.It can be pressurized higher than a refillable cylinder
d.It is a single-use, non-refillable cylinder that must never be refilled
Giải thích
A DOT-39 cylinder is a single-use, non-refillable container, so it must never be refilled with recovered or virgin refrigerant. It is not requalified like a refillable DOT cylinder and refilling it is both dangerous and illegal. After the refrigerant heel is recovered, the empty cylinder should be disposed of according to local rules.
Luyện miễn phí toàn bộ 240 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- Where should refrigerant cylinders be stored to remain safe?
- A supply house offers small cans of R-134a to a walk-in DIY customer for a home refrigerator. Under Section 608 sales rules, what is the technician-buyer situation for such small-can HFC sales in stationary refrigeration?
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