Type III — Low-PressureCâu 196 / 240
When handling a large recovery cylinder of R-11 removed from a chiller, the technician must remember to:
a.Fill to no more than 80 percent and keep it cool
b.Fill it completely to save space
c.Leave the valve open to relieve pressure
d.Store it on its side near a heater
Giải thích
Even low-pressure refrigerant cylinders must never be filled above 80 percent by weight, leaving room for liquid expansion, and should be stored cool and upright below 125°F. Overfilling can lead to hydrostatic rupture as temperature rises. Always weigh the cylinder rather than guessing.
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Câu hỏi liên quan cùng chủ đề
- A technician recovering R-123 reaches 25 mm Hg absolute but the reading rises back up after the recovery machine stops. This usually indicates:
- 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:
- 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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