Calculate the weld per minute, work speed of circular electrode of 220 mm diameter for carrying out seam welding at 4 welds per cm on 1.6 mm thick mild steel tube. Welding cycle consists of 3 cycles ‘on’ and 2 cycles ‘off’ Power supply is at 50 Hz.

• A. 500 welds/min, 1250 mm/min
• B. 600 welds/min, 1500 mm/min
• C. 22 welds/min, 55 mm/min
• D. 3000 welds/min, 75 mm/min

Answer: (B)