SafetyCâu 99 / 110
A master plumber must braze medical gas copper, which is hot work. What fire-safety precaution is required before starting?
a.Only wear gloves
b.Work faster to reduce exposure
c.Obtain a hot-work permit, clear/cover combustibles, and post a fire watch with an extinguisher
d.Open the gas valve to purge
Giải thích
Hot work such as brazing or soldering near combustibles requires a hot-work permit, removal or shielding of combustibles within the area, and a fire watch with an extinguisher during the work and for a period afterward. Sparks and heat can smolder in hidden materials and ignite after the crew leaves. This is standard for cutting, welding, and brazing.
Trích dẫn luật: 29 CFR 1926.352Luyện miễn phí toàn bộ 110 câu hỏi — không cần đăng ký.
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