A welding process using a continuously fed wire electrode and shielding gas.

A welding process using a continuously fed wire electrode and shielding gas.

• A. MIG welding
• B. Soldering
• C. Adhesive bonding
• D. Powder coating

Answer: (A)

The process described uses a filler wire fed continuously through the welding gun and shielding gas to protect the weld pool from the atmosphere, which is characteristic of MIG welding (Gas Metal Arc Welding). The wire acts as the filler and is melted by the electric arc as it is fed, while the shielding gas—such as argon, carbon dioxide, or a mix—guards the molten metal from oxidation and contamination, producing a clean weld. Soldering uses low-temperature filler metal and doesn’t involve an arc or shielding gas. Adhesive bonding relies on glue rather than metal fusion, and powder coating is a surface finishing process, not welding.

The process described uses a filler wire fed continuously through the welding gun and shielding gas to protect the weld pool from the atmosphere, which is characteristic of MIG welding (Gas Metal Arc Welding). The wire acts as the filler and is melted by the electric arc as it is fed, while the shielding gas—such as argon, carbon dioxide, or a mix—guards the molten metal from oxidation and contamination, producing a clean weld. Soldering uses low-temperature filler metal and doesn’t involve an arc or shielding gas. Adhesive bonding relies on glue rather than metal fusion, and powder coating is a surface finishing process, not welding.