Type I — Small Appliances第 114 / 240 题
A technician recovers refrigerant from ten small appliances into one recovery cylinder over a day. What must the technician watch to avoid overfilling the cylinder?
a.The cylinder must never be filled beyond 80% of its capacity by weight
b.The cylinder may be filled to 100% since it is a recovery cylinder
c.The cylinder can be filled until pressure reaches 500 psig
d.There is no fill limit for small-appliance refrigerant
解析
A recovery cylinder must never be filled beyond 80% of its rated capacity by weight to leave room for liquid expansion as temperature rises. Overfilling can cause dangerous hydrostatic pressure and rupture. The technician should use a scale and stop at the 80% limit, regardless of how many appliances were recovered.
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