Type I — Small Appliances第 107 / 240 题
When a small appliance's compressor is operable, why does the rule require a higher recovery level (90%) than when it is inoperable (80%)?
a.Because the appliance must be recharged afterward
b.Because HFCs recover faster than CFCs
c.A running compressor can pump more out
d.Because operable compressors always hold less oil
解析
A working compressor actively pumps refrigerant toward the recovery equipment, so more of the charge can realistically be removed, and the rule sets the higher 90% target. When the compressor cannot run, recovery is harder, so the standard is 80%. The rule scales the requirement to what is practically achievable.
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