Type I — Small AppliancesCâu 110 / 240
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?
a.Type III; evacuate to 25 mm Hg absolute
b.Type II; evacuate to 15 inches Hg vacuum
c.Type I; recover 80%/90% or reach 4 inches Hg vacuum
d.No certification; no recovery required
Giải thích
Both units are small appliances, so the technician needs at least Type I certification and must follow the small-appliance recovery rule of 80% (compressor off) or 90% (compressor on), or 4 inches Hg vacuum. Type II and Type III rules and their deeper vacuum levels apply to larger high- and low-pressure appliances. Recovery is always required before service or disposal.
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
- When a small appliance's compressor is operable, why does the rule require a higher recovery level (90%) than when it is inoperable (80%)?
- A recycling center employee, who is not an HVAC technician, is the last person to handle scrap refrigerators before shredding. What must the facility ensure?
- A technician finds a household refrigerator whose sealed system was already opened and is now at 0 psig (atmospheric). During service the technician plans to recover any refrigerant present. What is the best action?
- 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?
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