GATE ME 2015 Set 1 — Question 34
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Manufacturing Processes → Joining → Welding Processes
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Question
In a linear arc welding process, the heat input per unit length is inversely proportional to
Correct answer
(C) welding speed
Solution
The heat input per unit length () in arc welding is given by the formula , where is the heat transfer efficiency, is the welding voltage, is the welding current, and is the welding speed. From this expression, it is clear that , meaning the heat input per unit length is inversely proportional to the welding speed.
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