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GATE2019-2-51

A gas tungsten arc welding operation is performed using a current of $250 \: A$ and an arc voltage if $20 \: V$ at a welding speed of $5 \: mm/s$. Assuming that the arc efficiency is $70 \%$, the net heat input per unit length of the weld will be ____$kJ/mm$ (round off to one decimal place)

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