Welder Red Seal · Question
A welder is working on a construction site using a portable engine-driven welding machine. The generator is running in an enclosed pit approximately 3 metres deep. What is the primary atmospheric hazard that this setup presents to workers in the vicinity?
Engine-driven welders produce exhaust containing carbon monoxide, which is a colourless, odourless, and highly toxic gas. In an enclosed or semi-enclosed space
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Question: A welder is working on a construction site using a portable engine-driven welding machine. The generator is running in an enclosed pit approximately 3 metres deep. What is the primary atmospheric hazard that this setup presents to workers in the vicinity?
Answer options: ✅ Carbon monoxide accumulation.
- Oxygen enrichment.
- Argon gas buildup.
- Increased levels of ozone.
Correct answer: Carbon monoxide accumulation.
Explanation: Engine-driven welders produce exhaust containing carbon monoxide, which is a colourless, odourless, and highly toxic gas. In an enclosed or semi-enclosed space like a pit, carbon monoxide can quickly accumulate to dangerous levels, posing a severe threat to life. Oxygen enrichment or argon buildup are not typical byproducts of internal combustion engines, and ozone is associated with intense UV radiation, not exhaust.
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