What is the common point between MIG and MAG welding procedures? a) The use of a continuous consumable electrode. b) The use of an inert gas for ...

The answer is (a), the use of a continuous consumable electrode.

MIG and MAG welding are both arc welding processes that use a continuous consumable electrode to create a weld. The electrode is fed into the weld area by a wire feeder, and it melts to form the weld pool. The shielding gas is used to protect the weld pool from oxidation and contamination.

The other options are incorrect. MIG welding uses an inert gas for protection, while MAG welding uses an active gas. MIG welding can weld a wider variety of materials than MAG welding. MIG and MAG welding do not both require gas and electrode input.

Here is a table that summarizes the similarities and differences between MIG and MAG welding:

FeatureMIG weldingMAG weldingElectrodeConsumable wireConsumable wireShielding gasInert gasActive gasMaterials that can be weldedWide varietySteel, stainless steel, and aluminumProductivityHighHighCostLowLow

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Both MIG and MAG welding are versatile and efficient welding processes that can be used to weld a wide variety of materials. The choice of which process to use depends on the specific application.