Type III — Low-PressureCâu 176 / 240
A technician wants to warm the refrigerant in a low-pressure chiller to speed recovery. Which method is acceptable?
a.Adding oxygen to raise pressure
b.Circulating warm water through the chiller tubes
c.Applying a propane torch to the shell
d.Setting a space heater against the tubes
Giải thích
Circulating warm water through the chiller tubes gently raises refrigerant temperature and speeds recovery without risk. Using the machine's built-in heaters is also acceptable. An open flame such as a torch, or introducing oxygen, is dangerous and prohibited.
Luyện miễn phí toàn bộ 240 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- Approximately what inches-of-mercury vacuum reading corresponds to the 25 mm Hg absolute recovery level for low-pressure appliances?
- Non-condensable gases such as air that collect in a low-pressure chiller will:
- Compared with older designs, a high-efficiency purge unit is desirable because it:
- 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:
- When recovering from a low-pressure chiller with a large charge, the most efficient practice is to:
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