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___________ is used as an inert gas for metal inert gas welding.

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___________ is used as an inert gas for metal inert gas welding.

(a) Argon

(b) Radon

(c) Neon

(d) Nitrogen

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Question is from Welding in portion Metallurgy of Welding, Brazing and Soldering of Engineering Material & Metallurgy

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Correct choice is (a) Argon

To elaborate: Gas metal arc welding or MIG welding is a common welding process where an electric arc is produced between a consumable metal electrode and the workpiece. The arc and welding zone are surrounded by an inert gas. For MIG welding, argon or helium are used as the inert gas.

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