What type of weld fault occurs before or after welding?

What type of weld fault occurs before or after welding?

• A. Porosity
• B. Dimensional defects
• C. Cracking
• D. Incomplete fusion

Answer: (B)

Dimensional defects are faults tied to the size, shape, and fit-up of the joint, which can show up before welding and again after welding. Before welding, poor fit-up, gaps, misalignment, or incorrect bevels create dimensional inaccuracies even before any heat is applied. After welding, distortion, warping, or incorrect overall dimensions can occur because of heat input and cooling, altering the geometry of the joint. This makes dimensional defects the type that can occur at either stage. Porosity, cracking, and incomplete fusion are faults that arise primarily from the welding process itself—porosity from gas in the molten metal, cracking from stresses and metallurgy during or after welding, and incomplete fusion from insufficient heat or poor technique.

Dimensional defects are faults tied to the size, shape, and fit-up of the joint, which can show up before welding and again after welding. Before welding, poor fit-up, gaps, misalignment, or incorrect bevels create dimensional inaccuracies even before any heat is applied. After welding, distortion, warping, or incorrect overall dimensions can occur because of heat input and cooling, altering the geometry of the joint. This makes dimensional defects the type that can occur at either stage. Porosity, cracking, and incomplete fusion are faults that arise primarily from the welding process itself—porosity from gas in the molten metal, cracking from stresses and metallurgy during or after welding, and incomplete fusion from insufficient heat or poor technique.