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

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

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Manufacturing And Production Technology
In a shaper, the length of stroke is increased by

Increasing the centre distance of bull gear and crank pin
Decreasing the length of the slot in the slotted lever
Increasing the length of the arm
Decreasing the centre distance of bull gear and crank pin

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

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

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