Manufacturing And Production Technology
In a gating system, the ratio 1: 2: 4 represents

Runner area: ingate area: casting area
Sprue base area: ingate area: casting area
Sprue base area: runner area: ingate area
Pouring basin area: ingate area: runner area

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Manufacturing And Production Technology
Side rake angle of a single point cutting tool is the angle

Between the surface of the flank immediately below the point and a plane at right angles to the centre line of the point of the tool
By which the face of the tool is inclined sideways
By which the face of the tool is inclined towards back
Between the surface of the flank immediately below the point and a line drawn from the point perpendicular to the base

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Manufacturing And Production Technology
In determining the various forces on the chip, Merchant assumed that the

Cutting edge of the tool is sharp and it does not make any flank contact with the workpiece
Cutting velocity remains constant
Only continuous chip without built-up-edge is produced
All of these

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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.

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

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