Type I — Small AppliancesCâu 105 / 240
A technician finishes recovering a refrigerator and disconnects the equipment. To verify that recovery met the requirement using the vacuum method, what should the gauge read?
a.Positive pressure of 4 psig
b.10 inches Hg vacuum
c.At least 4 inches Hg vacuum
d.25 mm Hg absolute
Giải thích
The vacuum-based alternative for small appliances is met when the system reaches at least 4 inches of mercury vacuum. A positive pressure reading means refrigerant remains and recovery is incomplete. The deeper 10 inches Hg and 25 mm Hg absolute values apply to Type II and Type III appliances, not small appliances.
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 technician recovering from a small appliance notices the recovery cylinder is not pulling below atmospheric pressure. Which factor most likely prevents reaching the 4 inches Hg vacuum alternative?
- A landlord asks a Type I technician to simply cut the lines and toss out several old mini-fridges. What is the technician's correct response?
- Which of these is a defining physical feature of a small appliance that distinguishes it from field-installed equipment?
- A technician wants to recover refrigerant faster from a small appliance in cold weather when system pressure is very low. Which safe method raises pressure to aid recovery?
- 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?
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