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

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

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Manufacturing And Production Technology
The facing is an operation of

Embossing a diamond shaped pattern on the surface 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
Beveling the extreme end of a workpiece

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