Q25: Which of the following is a common respiratory hazard when welding? Carbon monoxide Nitrogen dioxide Metal fumes All of the above (For answer & explanation, please click: https://www.weldingandndt.com/question-answers-on-welding-for-cswip-3-1-and-aws-cwi-exams/)
Mathematics
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The correct option is 4.
- 4. All of the above
Welding processes generate a variety of airborne contaminants that pose respiratory hazards.
- Carbon monoxide (CO) can be produced from the breakdown of CO2 shielding gas or from incomplete combustion.
- Nitrogen dioxide (NO2) and other nitrogen oxides are formed when the intense heat of the arc reacts with nitrogen and oxygen in the air.
- Metal fumes are fine particles of vaporized metal and flux materials that condense in the air, containing various metallic oxides and other compounds depending on the materials being welded. All these substances can be harmful if inhaled.
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