Type I — Small Appliances第 102 / 240 题
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
解析
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.
法律依据: 40 CFR §82.156免费刷完整 240 道题库 — 无需注册。
同考点相关题目
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