GATE ME 2019 Set 2 — Question 61
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Manufacturing Processes → Joining → Welding Processes
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Question
A gas tungsten arc welding operation is performed using a current of and an arc voltage of at a welding speed of . Assuming that the arc efficiency is , the net heat input per unit length of the weld will be _______ kJ/mm (round off to one decimal place).
Correct answer
0.7 to 0.7
Solution
Given:
Current () =
Voltage () =
Welding speed () =
Arc efficiency () = The total heat input rate () is given by:The net heat input rate () considering the arc efficiency is:The net heat input per unit length () is calculated by dividing the net heat input rate by the welding speed:To convert the result to kJ/mm:Rounding off to one decimal place, the net heat input per unit length is .
Current () =
Voltage () =
Welding speed () =
Arc efficiency () = The total heat input rate () is given by:The net heat input rate () considering the arc efficiency is:The net heat input per unit length () is calculated by dividing the net heat input rate by the welding speed:To convert the result to kJ/mm:Rounding off to one decimal place, the net heat input per unit length is .
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