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

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

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

Answer: (A)

Gas Metal Arc Welding uses a continuously fed wire electrode and shielding gas. The welding gun feeds a consumable wire from a spool, and shielding gas (such as argon or CO2) blankets the arc to protect the molten weld from contamination. This combination provides a stable arc, clean welds, and high deposition rates, making it common for many fabrication tasks. The other processes rely on different shielding methods or electrode types: one uses a flux-coated electrode with slag and no external gas, another uses a non-consumable tungsten electrode with filler rod and no continuous wire feed, and the last uses a flux-filled wire for shielding rather than separate gas shielding (though some variants may use gas, it’s not the defining feature). Therefore, the described process is Gas Metal Arc Welding.

Gas Metal Arc Welding uses a continuously fed wire electrode and shielding gas. The welding gun feeds a consumable wire from a spool, and shielding gas (such as argon or CO2) blankets the arc to protect the molten weld from contamination. This combination provides a stable arc, clean welds, and high deposition rates, making it common for many fabrication tasks. The other processes rely on different shielding methods or electrode types: one uses a flux-coated electrode with slag and no external gas, another uses a non-consumable tungsten electrode with filler rod and no continuous wire feed, and the last uses a flux-filled wire for shielding rather than separate gas shielding (though some variants may use gas, it’s not the defining feature). Therefore, the described process is Gas Metal Arc Welding.