An toànCâu 1297 / 1605
The permissible exposure limit (PEL) for respirable crystalline silica under the OSHA construction standard is:
a.50 micrograms per cubic meter of air as an 8-hour TWA
b.There is no PEL
c.5 milligrams per cubic meter
d.500 micrograms per cubic meter
Giải thích
The silica PEL is 50 µg/m3 as an 8-hour time-weighted average, with an action level of 25 µg/m3. Exceeding these triggers additional controls and requirements.
Trích dẫn luật: 29 CFR 1926.1153(b)Luyện miễn phí toàn bộ 1605 câu hỏi — không cần đăng ký.
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- On a GHS label, which signal word indicates the MORE severe hazard?
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Sen Lin, Người sáng lập PrepPass · Đối chiếu với California CSLB Contractor License Law & Business Exam · Quy trình kiểm tra
Người kiểm duyệt Abraham Chen — Licensed California General Contractor (CSLB License #1101856 — kiểm tra)