Regulations & SafetyCâu 72 / 240
A technician notices a disposable refrigerant cylinder labeled 'DOT-39.' What does this designation mean for handling?
a.It must be hydrostatically retested every 5 years
b.It may be refilled up to five times
c.It is a single-use, non-refillable cylinder that must never be refilled
d.It can be pressurized higher than a refillable cylinder
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?
- A technician plans to braze on a system. What is the correct sequence regarding the refrigerant charge before applying heat?
- A technician recovering R-404A from a walk-in freezer notices the recovery cylinder is getting cold and recovery has slowed. What technique safely speeds recovery?
- A service company keeps invoices showing refrigerant added to and recovered from customer appliances. Under Section 608, these records are important because:
- A technician is working with an A2L refrigerant such as R-32 or R-1234yf. What added safety consideration applies compared with older non-flammable HFCs?
Cập nhật gần nhất: · quy trình kiểm tra
Sen Lin, Người sáng lập PrepPass · Đối chiếu với EPA Section 608 Technician Certification Exam · Quy trình kiểm tra