Welder Red Seal · Question
Which type of welding defect is characterized by a groove melted into the base metal adjacent to the toe of the weld and usually left unfilled?
Undercut is a common weld defect where the base metal along the toe of the weld is melted away, leaving a groove that reduces the thickness of the base metal an
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Question: Which type of welding defect is characterized by a groove melted into the base metal adjacent to the toe of the weld and usually left unfilled?
Answer options: ✅ Undercut
- Porosity
- Lack of fusion
- Crater crack
Correct answer: Undercut
Explanation: Undercut is a common weld defect where the base metal along the toe of the weld is melted away, leaving a groove that reduces the thickness of the base metal and can lead to stress concentration.
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