A gas t ungst en ar c wel di ng oper at i on i s performed using a current of 250 A and an arc voltage of 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).

A gas t ungst en ar c wel di ng oper at i on i s performed using a cur

1.	A gas t ungst en ar c wel di ng oper at i on i s performed using a current of 250 A and an arc voltage of 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).
A.	0.1
B.	1.4
C.	0.7
D.	None of these
Answer» D. None of these

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A gas t ungst en ar c wel di ng oper at i on i s performed using a current of 250 A and an arc voltage of 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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