Which option is NOT a weld type?

Which option is NOT a weld type?

• A. Arc
• B. Surface
• C. Plug
• D. Groove

Answer: (A)

Weld types describe how parts are joined and the shape of the weld bead, not how heat is applied. Arc refers to a welding method—the electric arc used to generate heat—so it’s about the process, not the joint geometry. Plug weld and groove weld are specific ways to join pieces (types of welds) and surface is a term sometimes used for depositing material on a surface, but it isn’t a standard weld type either. Therefore, arc is the one that isn’t a weld type.

Weld types describe how parts are joined and the shape of the weld bead, not how heat is applied. Arc refers to a welding method—the electric arc used to generate heat—so it’s about the process, not the joint geometry. Plug weld and groove weld are specific ways to join pieces (types of welds) and surface is a term sometimes used for depositing material on a surface, but it isn’t a standard weld type either. Therefore, arc is the one that isn’t a weld type.