Regulations & Safety第 50 / 240 题
A technician needs to warm a refrigerant cylinder to raise its pressure during charging. Which method is safe?
a.Use a propane torch on the cylinder base
b.Heat it with an electric heat gun on high
c.Set the cylinder in a bucket of warm water (no hotter than about 90°F)
d.Place the cylinder over an open flame
解析
The safe way to warm a cylinder is to place it in a bucket of warm water no hotter than about 90°F, which gently raises pressure without overheating. A torch, open flame, or high-heat gun can create dangerous pressure and can thermally decompose refrigerant into toxic gases. Never apply direct flame or concentrated heat to any refrigerant cylinder.
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