Common Hazards第 38 / 100 题
Before entering a permit-required confined space, what must be done regarding the atmosphere?
a.Nothing, just enter quickly
b.Light a match to check for gas
c.Test the atmosphere for oxygen, flammability, and toxicity
d.Spray air freshener
解析
The atmosphere of a permit-required confined space must be tested before entry for oxygen content, flammable gases, and toxic contaminants, in that order. Testing continues or is monitored during entry. Never rely on smell or appearance to judge atmospheric safety.
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