Gas Metal Arc Welding (GMAW) is described as

Gas Metal Arc Welding (GMAW) is described as

• A. Similar to TIG, but welding process in which an electric arc forms between a consumable MIG wire electrode and the workpiece metal, which heats the workpiece metal causing them to fuse
• B. Uses non-consumable tungsten electrode
• C. Friction welding
• D. Laser heating

Answer: (A)

Gas Metal Arc Welding uses a continuously fed consumable wire electrode as filler metal. An electric arc forms between that wire and the workpiece, melting both and fusing them together, while shielding gas protects the molten weld from the atmosphere. This approach is similar to TIG in that an arc is used and clean welds can be produced, but the electrode in GMAW is consumable and provides filler automatically, unlike TIG which uses a non‑consumable tungsten electrode and often requires separate filler metal. The other options describe processes that aren’t GMAW: a non-consumable tungsten electrode is characteristic of TIG, friction welding is a solid‑state process without an arc, and laser heating involves a laser, not an arc.

Gas Metal Arc Welding uses a continuously fed consumable wire electrode as filler metal. An electric arc forms between that wire and the workpiece, melting both and fusing them together, while shielding gas protects the molten weld from the atmosphere. This approach is similar to TIG in that an arc is used and clean welds can be produced, but the electrode in GMAW is consumable and provides filler automatically, unlike TIG which uses a non‑consumable tungsten electrode and often requires separate filler metal. The other options describe processes that aren’t GMAW: a non-consumable tungsten electrode is characteristic of TIG, friction welding is a solid‑state process without an arc, and laser heating involves a laser, not an arc.