Type III — Low-Pressure第 191 / 240 题
The main reason a torch must never be used to warm a low-pressure chiller during recovery is that:
a.It wastes propane
b.It cools the refrigerant too fast
c.Open flame can decompose refrigerant into toxic gases and is a burn and pressure hazard
d.It has no effect on recovery speed
解析
An open flame can break refrigerant down into toxic gases such as phosgene and hydrogen chloride, and localized heating can raise pressure dangerously and cause burns. Warm water or built-in heaters are the safe way to add heat. This is why torches are prohibited for warming the shell.
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