Welder Red Seal · Question
Which of the following weld discontinuities is generally considered the most critical and prone to re-initiate brittle fracture under tensile stress?
Transverse cracks are extremely critical discontinuities as they run perpendicular to the direction of stress and can easily propagate, leading to brittle fract
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Question: Which of the following weld discontinuities is generally considered the most critical and prone to re-initiate brittle fracture under tensile stress?
Answer options:
- Minor porosity
- Slight undercut ✅ Transverse cracks
- Convexity in a fillet weld
Correct answer: Transverse cracks
Explanation: Transverse cracks are extremely critical discontinuities as they run perpendicular to the direction of stress and can easily propagate, leading to brittle fracture. While undercut and porosity are also discontinuities, they are generally less critical than a propagating crack. Convexity (excessive crown) in a fillet weld can lead to stress concentrations but is typically not as severe as a crack.
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