Test Your Safety Knowledge

Maintain an oxygen level of at least 19.5%. Keep toxic gases and vapors to within acceptable levels. Neither of the above. ... A piercing of mucous membranes or the skin barrier by means of a needle stick, human bite, cut, and/or abrasion.) ... 85 decibels. 100 decibels. Impulse noise is the type produced by something like: A jackhammer. A ... ................
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