Type I — Small AppliancesCâu 90 / 240
A technician wants to speed up refrigerant recovery from a chest freezer by heating the compressor with a torch and rapping the tubing with a hammer. Which statement is correct?
a.Any amount of direct torch flame on the compressor is required to meet recovery levels
b.Gentle warming and light tapping help; open flame is improper
c.The freezer must be inverted and dropped to release trapped refrigerant
d.Recovery speed cannot be improved by any technique on a small appliance
Giải thích
Mild warmth (for example a heat gun or warm water) raises refrigerant pressure and helps liquid migrate, and light tapping can free trapped charge, improving recovery from a small appliance. However, a direct open flame on the compressor can overheat oil, damage the system, and create hazards, so it is not proper practice. Techniques should speed recovery without endangering the technician or breaking down the oil.
Trích dẫn luật: 40 CFR §82.156Luyện miễn phí toàn bộ 240 câu hỏi — không cần đăng ký.
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Câu hỏi liên quan cùng chủ đề
- A scrap yard receives old household refrigerators and vending machines for crushing. Before the units are disposed of, who is responsible for ensuring the refrigerant is recovered?
- Which of the following units would a technician correctly classify as a small appliance?
- A technician needs to access the sealed system of a household refrigerator that has no service valve. What tool is commonly used to gain temporary access for recovery?
- System-dependent (passive) recovery equipment may be used on which of the following?
- During recovery from a small appliance with a working compressor, a technician can only reach 82% recovery before the unit stops pulling down. What should the technician do to comply?
- A shop buys a new recovery machine to service small appliances. Recovery equipment manufactured after November 15, 1993 must meet which requirement?
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