Type I — Small AppliancesCâu 114 / 240
A technician recovers refrigerant from ten small appliances into one recovery cylinder over a day. What must the technician watch to avoid overfilling the cylinder?
a.The cylinder must never be filled beyond 80% of its capacity by weight
b.The cylinder can be filled until pressure reaches 500 psig
c.There is no fill limit for small-appliance refrigerant
d.The cylinder may be filled to 100% since it is a recovery cylinder
Giải thích
A recovery cylinder must never be filled beyond 80% of its rated capacity by weight to leave room for liquid expansion as temperature rises. Overfilling can cause dangerous hydrostatic pressure and rupture. The technician should use a scale and stop at the 80% limit, regardless of how many appliances were recovered.
Luyện miễn phí toàn bộ 240 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- After recovering refrigerant into a recovery cylinder from several small appliances, a technician wants to reuse the recovered refrigerant in a customer's unit without sending it out. What is generally required?
- A PTAC unit in a hotel room holds 4.5 pounds of R-410A and is factory-sealed. A technician must replace the compressor. Before opening the sealed system, the technician must:
- A technician's self-contained recovery machine is labeled as certified for small-appliance recovery. What performance does that certification confirm it can meet?
- Which statement about system-dependent (passive) recovery on small appliances is correct?
- A homeowner offers to help a Type I technician 'top off' a leaking mini-fridge instead of finding the leak. What is the best professional practice?
- A technician evacuates a small appliance to 4 inches Hg vacuum and, after closing the valves, watches the pressure rise back toward zero. What does this rising pressure most likely indicate?
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