An toànCâu 1307 / 1605
An acceptable oxygen concentration for confined space entry is generally in what range?
a.10% to 30%
b.19.5% to 23.5%
c.Any level is fine with a respirator
d.5% to 15%
Giải thích
Normal breathable air is about 20.9% oxygen. Below 19.5% is oxygen-deficient and above 23.5% is oxygen-enriched (fire risk). Entry generally requires oxygen between 19.5% and 23.5%.
Trích dẫn luật: 29 CFR 1926.1204(c)Luyện miễn phí toàn bộ 1605 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- For lead work above the action level, the employer must provide hygiene facilities so workers can:
- A permit-required confined space is a confined space that has one or more of which characteristics?
- Before entering a permit-required confined space, the entry permit must document that the atmosphere has been tested. Which is typically tested FIRST?
- During a permit-required confined space entry, an attendant must:
- For permit space entry, the employer must ensure rescue and emergency services are:
- California's Heat Illness Prevention standard applies to outdoor places of employment. At what temperature must the employer's high-heat procedures take effect for industries like construction?
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)