MIG stands for in welding?

• A. Gas Metal Arc Welding
• B. Metal Ion Gas
• C. Metal Inert Gas
• D. Machined Integrated Gas

Answer: (C)

Metal Inert Gas refers to the shielding gas used to protect the weld from the atmosphere. The “inert” part means the gas is nonreactive with the molten metal, helping prevent oxidation and porosity as the weld forms. While many people also call the process Gas Metal Arc Welding, MIG is the common shorthand for the shield gas idea, and that shielding gas is what the acronym is naming. The other options don’t fit because they either describe the process name or introduce terms not used to spell out MIG. In practice, shields are typically inert gases like argon or helium (or mixtures), whereas using a reactive gas like CO2 leads to the MAG variant, not MIG.