Manufacturing And Production Technology
Jigs are used

To check the accuracy of workpiece
None of these
For holding the work in milling, grinding, planing or turning operations
For holding and guiding the tool in drilling, reaming or tapping operations

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Manufacturing And Production Technology
The facing is an operation of

Machining the ends of a workpiece to produce a flat surface square with the axis
Embossing a diamond shaped pattern on the surface of a workpiece
Reducing the diameter of a workpiece over a very narrow surface
Beveling the extreme end of a workpiece

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