An toànCâu 1263 / 1605
Before entering a trench more than 4 feet deep where a hazardous atmosphere could exist (e.g., near landfill or sewer), the employer must:
a.Simply open the trench for a few minutes
b.Test the atmosphere for oxygen deficiency and hazardous gases and provide controls as needed
c.Rely on workers' sense of smell
d.Ignore the atmosphere below 10 feet
Giải thích
1926.651(g) requires atmospheric testing in excavations over 4 feet deep where oxygen deficiency or hazardous/flammable atmospheres could reasonably exist, with adequate ventilation or respiratory protection provided.
Trích dẫn luật: 29 CFR 1926.651(g)Luyện miễn phí toàn bộ 1605 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- For an excavation deeper than 20 feet, protective systems (such as shoring or shielding) must be:
- A trench is 5 feet deep. What means of egress must be provided for workers?
- Excavated spoil, materials, and equipment must be kept at least how far back from the edge of an excavation?
- In the OSHA soil classification system, which soil type is the most stable?
- For a simple sloping system in Type C soil (and no engineering), the maximum allowable slope is approximately:
- Which condition would require a competent person to take additional precautions such as installing support to prevent an excavation cave-in from adjacent structures?
Cập nhật gần nhất: · quy trình kiểm tra
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)