The GATE Grind

GATE 2022 MT – Question 44

Manufacturing Processes · Welding and joining · 2 marks · Multiple select

Which of the following parameter(s) influence(s) the melting rate of the consumable wire in a gas metal arc welding process?

  1. Stick-out length
  2. Welding speed
  3. Welding current
  4. Diameter of the consumable wire

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Show answer and explanation

Correct answer: (A) Stick-out length; (C) Welding current; (D) Diameter of the consumable wire

Explanation

Melting involves arc heating and resistive heating of the wire extension. Current, wire diameter and stick-out length affect those inputs and the heated wire geometry. Travel speed controls heat deposited per weld length, not the intrinsic wire melting relation.

Hence **A,C,D**.