An toànCâu 1287 / 1605
At what 8-hour time-weighted average noise level does OSHA construction require feasible administrative or engineering controls, and hearing protection?
a.120 dBA
b.90 dBA
c.70 dBA
d.60 dBA
Giải thích
1926.52 sets the construction permissible noise exposure at 90 dBA as an 8-hour TWA. When exposure exceeds this, feasible controls must be used and hearing protection provided.
Trích dẫn luật: 29 CFR 1926.52 / 1926.101Luyện miễn phí toàn bộ 1605 câu hỏi — không cần đăng ký.
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Người kiểm duyệt Abraham Chen — Licensed California General Contractor (CSLB License #1101856 — kiểm tra)