Home › Previous year questions › GATE 2022 PI › Question 51GATE 2022 PI – Question 51 Manufacturing Processes I · Joining of Materials · 2 marks · Numerical answer
Steady GTAW uses 18 V and 160 A. Arc creation loses 40% of input power; workpiece convection/radiation lose 800 W. Find effective power melting the workpiece in W, nearest integer.
Practise this question in The GATE Grind →
Show answer and explanation Correct answer: 926 to 930
Explanation Electrical power = 18×160 = 2880 W. After arc loss, 60% remains: 1728 W. Subtract workpiece heat loss: 1728−800 = **928 W**.
More Joining of Materials questions GATE 2021 PI Q17 – Which defect is NOT associated with welding? GATE 2021 PI Q54 – An arc-welding DC source has linear characteristic with open-circuit voltage 60 V and… GATE 2026 PI Q12 – Which statement about brazing filler material is FALSE? GATE 2026 PI Q13 – A 6 kW arc-welding source joins two similar metals. Total energy loss is 50%, weld… GATE 2025 PI Q16 – In which welding process is an exit hole common? GATE 2025 PI Q47 – For DC arc welding, voltage V (V) and arc length l (cm) satisfy V = 30 + 30l. Open-circuit… All Joining of Materials questions →