Which welding process uses shielding gas and a continuously fed wire?

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

Answer: (C)

MIG welding (Metal Inert Gas) is the process that uses shielding gas and a continuously fed wire. The shielding gas flows through the welding gun to protect the molten weld from reacting with the air, while a solid filler wire is fed continuously from a spool to the tip to create and deposit the weld metal as you weld. This combination—gas shielding plus a continuously fed wire—makes MIG fast and well-suited to automotive body work, especially on thinner sheet metal. TIG welding also uses shielding gas but relies on a non‑consumable tungsten electrode with separate filler rod, not a continuously fed wire. Stick welding uses a coated electrode and doesn’t use shielding gas, and flux-cored arc welding uses a wire with flux (sometimes self-shielded, sometimes gas-shielded) rather than a solid wire fed continuously with external shielding gas.