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.

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

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Manufacturing And Production Technology
Fixtures are used

For holding and guiding the tool in drilling, reaming or tapping operations
To check the accuracy of workpiece
For holding the work in milling, grinding, planing or turning operations
None of these

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Manufacturing And Production Technology
The saw milling is an operation of

Reproduction of an outline of a template on a workpiece
Producing narrow slots or grooves on a workpiece
Machining several surfaces of a workpiece simultaneously
Producing grooves around the periphery of a cylindrical or conical workpiece

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