Type I — Small AppliancesCâu 113 / 240
A technician's self-contained recovery machine is labeled as certified for small-appliance recovery. What performance does that certification confirm it can meet?
a.Pulling 500 microns for deep dehydration
b.Recovering at least 90% when the compressor operates and 80% when it does not (or 4 inches Hg vacuum)
c.Reaching 25 mm Hg absolute on low-pressure chillers
d.Recovering 100% of the refrigerant every time
Giải thích
A recovery machine certified for small appliances is verified to reach the required 90% (compressor operating) or 80% (compressor not operating) recovery, or the 4 inches Hg vacuum alternative. No equipment is required to recover 100% of the charge. Deep-vacuum micron levels apply to evacuation and dehydration on larger systems, not to the small-appliance recovery standard.
Trích dẫn luật: 40 CFR §82.156Luyện miễn phí toàn bộ 240 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- A water cooler and a household freezer are both factory-sealed with about 3 pounds of refrigerant each. A technician servicing them must, at minimum, hold which certification and follow which recovery rule?
- 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 recovers refrigerant from ten small appliances into one recovery cylinder over a day. What must the technician watch to avoid overfilling the cylinder?
- 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?
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