Type I — Small Appliances第 119 / 240 题
A technician needs a permanent, leak-free access point after servicing a small sealed refrigerator. Which method is preferred over leaving a bolt-on piercing valve?
a.Leave the piercing valve and add extra tape
b.Braze in a proper process tube or access fitting and seal it
c.Use a rubber cap on the piercing valve
d.Drill a second hole for redundancy
解析
A brazed process tube or soldered access fitting gives a durable, leak-free seal, unlike a bolt-on piercing valve whose gasket can degrade. This reduces future refrigerant loss and gives reliable access for later service. Tape or caps on a piercing valve are not acceptable permanent seals.
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