Type III — Low-PressureCâu 200 / 240
The main safety concern that sets the 10 psig pressurization limit on low-pressure appliances is:
a.Damaging the compressor windings
b.Bursting the rupture disk set near 15 psig
c.Freezing the condenser water
d.Overfilling the recovery cylinder
Giải thích
The 10 psig limit exists to keep test pressure safely below the rupture disk, which typically bursts near 15 psig to protect the low-pressure shell. Exceeding 10 psig risks rupturing the disk and releasing the charge. This is why nitrogen leak testing on these machines is done at low pressure.
Luyện miễn phí toàn bộ 240 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- Which of the following is NOT a low-pressure appliance refrigerant?
- Excessive water in a low-pressure chiller can freeze and rupture tubes because low-pressure refrigerants:
- When handling a large recovery cylinder of R-11 removed from a chiller, the technician must remember to:
- A high-efficiency purge unit on a chiller is often equipped with a purge-rate log because a rising rate:
- The deep 25 mm Hg absolute recovery requirement exists for low-pressure appliances because:
- Which practice is correct when leak testing a low-pressure chiller that is under a vacuum?
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