GATE ME concept:welding PYQs & Answers — Page 2

Questions 11–14 of 14. Imported answers require independent review unless marked reviewed.

Topic practice 14 questionsPage 2 of 2

A gas tungsten arc welding operation is 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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A welding operation is being performed with voltage = 30 V and current = 100 A. The cross-sectional area of the weld bead is 20 mm². The work-piece and filler are of titanium for which the specific energy of melting is 14 J/mm³. Assuming a thermal efficiency of the welding process 70%, the welding speed (in mm/s) is ______ (correct to two decimal places).

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In an arc welding process, welding speed is doubled. Assuming all other process parameters to be constant, the cross sectional area of the weld bead will

Your answerChoose one option.

increase by 25 %

increase by 50 %

reduce by 25 %

reduce by 50 %

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It is desired to make a product having T-shaped cross-section from a rectangular aluminium block. Which one of the following processes is expected to provide the highest strength of the product?

Your answerChoose one option.

Welding

Casting

Metal forming

Machining

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GATE ME concept:welding PYQs

Question 51

Question 53

Question 23

Question 25