Which welding process uses a non-consumable tungsten electrode and shielding gas?

• A. MIG welding
• B. TIG welding
• C. Stick welding
• D. Flux-cored arc welding

Answer: (B)

Tungsten Inert Gas welding, or TIG welding, uses a non-consumable tungsten electrode and shielding gas to protect the arc. The tungsten tip remains intact as the arc forms between the electrode and the workpiece, while filler metal can be added separately if needed. The shielding gas—typically argon or a mix with helium—flows around the arc to prevent oxidation. This combination of a non-melting tungsten electrode with a protective gas shield is what sets TIG apart from other welding methods, which rely on consumable electrodes or different shielding approaches.