Manufacturing And Production Technology
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. Calculate R.P.M. and energy requirement of the above circular electrodes assuming effective resistance between electrodes as 100 ohm.

6.8 rpm, 6 joules
2.17 rpm, 600 joules
22 rpm, 600 joules
5.03 rpm, 600 joules

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Manufacturing And Production Technology
Which of the following statement is correct for oblique cutting system?

Frequently, more than one cutting edges are in action
The cutting edge is inclined at an angle less than 90° with the normal to the velocity of the tool
The chip flows on the tool face at an angle less than 90° with the normal on the cutting edge
All of these

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