SafetyCâu 107 / 110
Cutting and grinding cast iron or concrete for a plumbing penetration generates respirable crystalline silica. What is the primary control the plumber should use?
a.Work faster
b.Open a window only
c.Wet cutting or on-tool dust collection (engineering controls) plus respiratory protection as needed
d.No control is needed for short tasks
Giải thích
The primary defense against respirable silica is engineering controls, using water (wet cutting) or a vacuum dust-collection shroud on the tool to suppress dust at the source, supplemented by respiratory protection when needed. Silica dust causes silicosis and is regulated with a strict exposure limit. Dry cutting without controls quickly exceeds the permissible exposure limit.
Trích dẫn luật: 29 CFR 1926.55Luyện miễn phí toàn bộ 110 câu hỏi — không cần đăng ký.
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