Type III — Low-PressureCâu 190 / 240
A machine room housing a low-pressure chiller should have a refrigerant monitor and ventilation mainly to protect against:
a.Oxygen displacement and refrigerant exposure
b.Frozen condenser water
c.Excess humidity damaging the walls
d.Static electricity
Giải thích
Refrigerant vapor is heavier than air and can pool near the floor of a machine room, displacing oxygen and exposing workers. A refrigerant monitor and mechanical ventilation warn of a leak and clear the space. This is a standard safety requirement for chiller machine rooms.
Luyện miễn phí toàn bộ 240 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- During leak testing, some technicians raise the pressure in a low-pressure chiller just above atmospheric so that:
- Low-loss fittings on recovery hoses are important on low-pressure work because they:
- Which refrigerant is a CFC once widely used in low-pressure chillers and now available only as reclaimed stock?
- The main reason a torch must never be used to warm a low-pressure chiller during recovery is that:
- In a low-pressure chiller, the evaporator normally operates:
- A technician recovering R-123 reaches 25 mm Hg absolute but the reading rises back up after the recovery machine stops. This usually indicates:
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