GMAW and GTAW refer to which welding processes?

• A. Gas Metal Arc Welding and Gas Tungsten Arc Welding
• B. Shielded Metal Arc Welding
• C. Flux-Cored Arc Welding
• D. Submerged Arc Welding

Answer: (A)

GMAW and GTAW refer to two gas-shielded arc welding methods. Gas Metal Arc Welding uses a continuously fed consumable wire electrode with shielding gas to protect the weld, while Gas Tungsten Arc Welding uses a non-consumable tungsten electrode with shielding gas, typically argon or helium. Both rely on an electric arc to melt the metal while the shielding gas prevents contamination from the atmosphere. The other options describe processes that rely on flux (not gas shielding) or submerged flux, such as Shielded Metal Arc Welding, Flux-Cored Arc Welding, and Submerged Arc Welding, so the full names shown by the acronyms are the correct match.