Welder Red Seal · Question
In a multi-pass FCAW groove weld, what is a primary cause of slag inclusions between weld beads?
FCAW is a slag-producing process. If the slag covering a completed weld bead is not thoroughly removed by grinding or wire brushing before the next bead is depo
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Question: In a multi-pass FCAW groove weld, what is a primary cause of slag inclusions between weld beads?
Answer options:
- Using a shielding gas with too much argon ✅ Insufficient interpass cleaning
- Setting the voltage too high for the wire feed speed
- Using DCEN polarity with a gas-shielded wire
Correct answer: Insufficient interpass cleaning
Explanation: FCAW is a slag-producing process. If the slag covering a completed weld bead is not thoroughly removed by grinding or wire brushing before the next bead is deposited, the subsequent pass can trap this slag, resulting in a slag inclusion defect.
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Question explanations
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