Manufacturing And Production Technology
The facing is an operation of

Embossing a diamond shaped pattern on the surface of a workpiece
Beveling the extreme end of a workpiece
Machining the ends of a workpiece to produce a flat surface square with the axis
Reducing the diameter of a workpiece over a very narrow surface

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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.

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

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Manufacturing And Production Technology
Which of the following statement is wrong as regard to down milling?

The coolant can be poured directly at the cutting zone where the cutting force is maximum.
It can not be used on old machines due to backlash between the feed screw of the table and the nut.
The chips are disposed off easily and do not interfere with the cutting.
The surface milled appears to be slightly wavy.

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