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

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

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Manufacturing And Production Technology
Which of the following statement is correct in regard to centreless grinding?

All of these
It is a continuous process and adopted for production work
It requires no holding device for the work
The workpiece is supported throughout its entire length as grinding takes place

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