Which option lists all four weld types correctly?

Which option lists all four weld types correctly?

• A. Surface, Plug, Groove, Fillet
• B. Surface, Plug, Arc, Fillet
• C. Plug, Groove, Fillet, Edge
• D. Surface, Groove, Lap, Fillet

Answer: (A)

The basic idea is recognizing common forms that welds can take when joining parts, not the welding process itself. The four forms listed—surface, plug, groove, and fillet—cover the primary ways metal can be deposited or shaped to create a joint. A surface weld is laid on the surface to build up material or finish a seam. A plug weld is welded through a hole in one piece to fuse it to the piece beneath, often used when you can’t access the joint face directly. A groove weld fills a groove between pieces, forming a strong seam along the joint line. A fillet weld creates a triangular bead at the junction of two members, such as in corner or lap joints. Together, these represent the main weld-form options you’ll encounter in many beginner guides. Note that arc refers to the welding process itself, not a weld form, and edge or lap describe joint configurations rather than the primary weld shapes listed here.