Manufacturing And Production Technology
In abrasive jet machining, as the distance between the nozzle tip and the work surface increases, the material removal rate

Decreases becomes stable and then increases
Increases continuously
Decreases continuously
Increases, becomes stable and then decreases

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

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Manufacturing And Production Technology
The snag grinding is done

To produce good surface finish and high degree of accuracy
To grind exterior cylindrical surfaces
To remove considerable amount of metal without regard to accuracy of the finished surface
Any one of the above

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