Which term describes the wire-fed welding method?

• A. ARC Welding
• B. MIG Welding
• C. Troubleshooting
• D. Preventive Maintenance

Answer: (B)

Wire-fed welding is a process where a continuous electrode wire is fed through the welding gun toward the work, and the arc melts the wire to form the weld while shielding gas protects the weld pool from contamination. This setup is exactly what MIG welding uses—Metal Inert Gas, also called Gas Metal Arc Welding—with a consumable wire electrode and shielding gas. MIG is popular because it allows for efficient welds on a range of metals and thicknesses and is relatively easy to learn, especially compared to some other arc methods. The other terms aren’t welding methods themselves—one is a broad family of arc processes, and the others are maintenance/diagnostic activities rather than welding techniques.