What is the purpose of test fitting panels before welding?

• A. To paint them first
• B. To ensure proper alignment and fit
• C. To bend them around
• D. To weld without clamps

Answer: (B)

Verifying alignment and fit before permanent welding. When you test fit a panel, you position it with clamps or tack welds and check that the gaps around it are even, the body lines match from panel to panel, and the panel sits flush with surrounding surfaces. This step helps you catch misalignments early, so you can trim, adjust, or massage as needed and plan where to place fasteners or shims. Getting the fit right now prevents distortion, poor seam gaps, and the need for costly rework after welding. Painting ahead of time isn’t part of this process, and shaping or bending the panel is a separate step from just checking fit. Welding without clamps would make it impossible to verify alignment and would lead to unsafe, misaligned joints.