Manufacturing And Production Technology
It is desired to perform the operations like drilling, reaming, counter-boring etc. on a work piece. Which of the following machine will be used?

Sensitive drilling machine
Gang drilling machine
Radial drilling machine
Multiple spindle drilling machine

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Manufacturing And Production Technology
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.

22 welds/min, 55 mm/min
600 welds/min, 1500 mm/min
3000 welds/min, 75 mm/min
500 welds/min, 1250 mm/min

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