Welder Red Seal · Question
A welder is performing Gas Metal Arc Welding (GMAW) on stainless steel in a fabrication shop. The shop has general dilution ventilation. Over time, the welder begins to experience irritation in their throat and nose. What is the most appropriate immediate action?
Irritation symptoms indicate that the current ventilation is insufficient to control the fumes, especially from stainless steel which can produce hazardous chro
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Question: A welder is performing Gas Metal Arc Welding (GMAW) on stainless steel in a fabrication shop. The shop has general dilution ventilation. Over time, the welder begins to experience irritation in their throat and nose. What is the most appropriate immediate action?
Answer options:
- Continue welding but increase the general ventilation fan speed. ✅ Install a local exhaust ventilation (LEV) system at the weld point.
- Take a break and drink some water to alleviate the irritation.
- Switch to a different welding process to reduce fume generation.
Correct answer: Install a local exhaust ventilation (LEV) system at the weld point.
Explanation: Irritation symptoms indicate that the current ventilation is insufficient to control the fumes, especially from stainless steel which can produce hazardous chromium and nickel compounds. Local exhaust ventilation (LEV) is the most effective immediate and long-term solution for point-source fume control, directly capturing fumes at the source. Increasing general dilution ventilation might not be enough, and taking a break or switching processes doesn't address the hazard at its source.
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