Welder Red Seal · Question
What is the primary safety concern when striking an arc on a pressure vessel or pipe containing flammable substances?
Welding on pressure vessels or pipes that contain or have contained flammable substances is extremely dangerous due to the high risk of explosion or fire from i
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Question: What is the primary safety concern when striking an arc on a pressure vessel or pipe containing flammable substances?
Answer options: ✅ Risk of explosion or fire due to ignition of flammable contents
- Excessive noise affecting hearing
- Difficulty in maintaining arc stability
- Degradation of weld quality
Correct answer: Risk of explosion or fire due to ignition of flammable contents
Explanation: Welding on pressure vessels or pipes that contain or have contained flammable substances is extremely dangerous due to the high risk of explosion or fire from ignition of residual vapours or contents. Proper purging and safety protocols are essential.
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- A welder is fabricating a pressure vessel component using FCAW-G with an E70T-1 wire. The procedure specifies
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