Type I — Small AppliancesCâu 102 / 240
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.The refrigerant is an HFC and cannot be recovered
b.The 4 inches Hg vacuum only applies to low-pressure chillers
c.Small appliances are exempt from vacuum requirements
d.A restriction, a closed valve, or a saturated cylinder is blocking full evacuation
Giải thích
If a system will not pull into a vacuum, the usual causes are a restriction in the access path, a closed or partially opened valve, or a recovery cylinder that is full or at high pressure. The technician should check the connections, valves, and cylinder before assuming the appliance is empty. The 4 inches Hg vacuum is a valid recovery alternative for small appliances regardless of refrigerant type.
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 vending machine repair company sends technicians to recover refrigerant from beverage coolers in the field. These sealed factory-charged coolers hold about 2 pounds of R-134a. Under Section 608 they are treated as:
- A technician connects recovery equipment to both the high and low sides of a small appliance during recovery. What is the main advantage of accessing both sides?
- Which appliance would NOT be recovered under the small-appliance rules?
- 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 finishes recovering a refrigerator and disconnects the equipment. To verify that recovery met the requirement using the vacuum method, what should the gauge read?
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