Type I — Small Appliances第 89 / 240 题
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?
a.A halide leak detector
b.A micron gauge
c.A saddle-type piercing (line-tap) valve on the process stub or tubing
d.A brazing torch to open the suction line permanently
解析
Small sealed appliances often lack service ports, so technicians attach a piercing (saddle) valve to a process stub or copper line to access the refrigerant for recovery. A piercing valve should be used only temporarily because it can leak over time. After service the access point is typically brazed closed rather than left on a bolt-on piercing valve.
法律依据: 40 CFR §82.156免费刷完整 240 道题库 — 无需注册。
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