A technician stores refrigerant cylinders in a work van during summer. To avoid dangerous pressure buildup, cylinders should not be exposed to temperatures above:
a.125°F
b.300°F
c.212°F
d.500°F
解析
Refrigerant cylinders should never be exposed to temperatures above 125°F, because heat raises the internal pressure and can cause the cylinder to rupture or activate its relief device. 212°F, 300°F, and 500°F are far beyond safe limits. Cylinders should be kept in a cool, shaded, ventilated place and secured upright.
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