Safety第 91 / 100 题
What control best reduces respirable crystalline silica exposure when sanding or grinding concrete?
a.Working faster to finish sooner
b.Using a household fan to blow dust around
c.Wet methods or tools with vacuum dust collection (HEPA), plus respiratory protection when needed
d.Sweeping the dry dust with a broom
解析
Silica dust is controlled at the source using water suppression or tools fitted with HEPA vacuum dust collection, which is the preferred engineering control under Cal/OSHA. Respiratory protection supplements these controls when exposures remain high. Dry sweeping and blowing dust make exposures worse.
法律依据: Cal/OSHA Title 8免费刷完整 100 道题库 — 无需注册。
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