Which of the following are typical signs of improper fit-up?

• A. Gaps, misalignment, and wrong bevels.
• B. Perfect edge alignment within tight tolerances.
• C. Excellent joint fit with no gaps.
• D. No surface contamination.

Answer: (A)

Genuine fit-up quality is about how the parts are prepared and positioned before welding. When there are gaps, misalignment, and wrong bevels, the joint geometry isn’t correct for the weld to fuse properly. Gaps prevent full root penetration, misalignment causes uneven heat distribution and poor geometry, and incorrect bevels lead to an improper weld cross-section. All of this points to an improper fit-up and risk of defects or distortion.

By contrast, edge alignment that sits within tight tolerances and a joint that fits well with no gaps indicate the pieces are prepared correctly for welding. Surface cleanliness matters for weld quality, but it doesn’t itself indicate fit-up quality; a clean surface doesn’t fix misalignment or incorrect bevels.