Welder Red Seal · Question
A welder is setting up for an FCAW-S (self-shielded flux-cored arc welding) job on structural steel outdoors. The wind speed is measured at 15 km/h (9 mph). What is the primary concern for weld quality under these conditions?
High wind speeds can blow away the protective gas shield generated by the flux in self-shielded FCAW, leading to atmospheric contamination and increased porosit
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Question: A welder is setting up for an FCAW-S (self-shielded flux-cored arc welding) job on structural steel outdoors. The wind speed is measured at 15 km/h (9 mph). What is the primary concern for weld quality under these conditions?
Answer options:
- Excessive spatter due to high current settings. ✅ Increased porosity due to inadequate shielding.
- Reduced penetration from too slow a travel speed.
- Manganese loss causing brittle welds.
Correct answer: Increased porosity due to inadequate shielding.
Explanation: High wind speeds can blow away the protective gas shield generated by the flux in self-shielded FCAW, leading to atmospheric contamination and increased porosity in the weld metal. While spatter or penetration issues can occur, porosity due to inadequate shielding is the primary concern with wind.
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