Type III — Low-PressureCâu 179 / 240
When recovering from a low-pressure chiller with a large charge, the most efficient practice is to:
a.Recover vapor only
b.Recover with the purge unit running
c.Recover liquid first, then vapor
d.Recover only after adding nitrogen
Giải thích
Recovering liquid first moves the bulk of the charge quickly, then vapor recovery pulls the remaining refrigerant down to the required 25 mm Hg absolute. Recovering vapor alone is far slower on a large charge. The purge unit removes air but is not the recovery method.
Luyện miễn phí toàn bộ 240 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- A technician wants to warm the refrigerant in a low-pressure chiller to speed recovery. Which method is acceptable?
- Low-pressure chillers most commonly use which type of compressor?
- If a low-pressure chiller's high-pressure limit control trips during operation, the technician should first:
- The rupture disk on a low-pressure appliance should be:
- A device that automatically maintains the correct refrigerant level between the condenser and evaporator of a low-pressure chiller is the:
- HCFC-123 requires good ventilation during service primarily because it:
Cập nhật gần nhất: · quy trình kiểm tra
Đội Ngũ Biên Tập PrepPass · Đối chiếu với EPA Section 608 Technician Certification Exam · Quy trình kiểm tra