An toànCâu 347 / 360
A plumber is brazing a joint on a fitting that may be cadmium-plated in a small, poorly ventilated mechanical room. What is the primary hazard and control?
a.The fumes smell bad, so just open a window a crack
b.Toxic metal fumes (such as cadmium) require local exhaust ventilation and possibly respiratory protection
c.There is no fume hazard from brazing
d.Only the heat is a concern, not the fumes
Giải thích
Heating cadmium-plated or certain silver-alloy filler metals releases toxic metal fumes that can cause severe lung injury even at low visible levels. Cal/OSHA requires controlling such exposures with adequate ventilation, preferably local exhaust, and respiratory protection under §5144 when ventilation is insufficient. Working in a tight, unventilated space multiplies the hazard, so ventilation is the first line of defense.
Trích dẫn luật: Cal/OSHA Title 8 §5144Luyện miễn phí toàn bộ 360 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- A plumber uses an open flame to solder copper joints near wood framing inside a wall cavity. After finishing the hot work, what fire-safety step is required?
- Before starting to braze pipe with a torch in an occupied building, what must be immediately available at the hot-work location?
- A plumber is sweating copper joints on a potable water line. To protect public health, what kind of solder must be used on drinking-water piping in California?
- Before hot work in an area with combustible materials on the floor, what is the recommended practice for those combustibles?
- A plumber uses acid-based soldering flux and a pipe-joint chemical cleaner. Under Cal/OSHA's Hazard Communication standard, what is required for these products?
- A plumber is cutting cast-iron pipe with a grinder, sending out sparks and metal chips. What PPE does Cal/OSHA require for this task?
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