Manufacturing And Production Technology
A jig is defined as a device which

Is used to check the accuracy of workpiece
Holds and locates a workpiece during an inspection or for a manufacturing operation
All of these
Holds and locates a workpiece and guides and controls one or more cutting tools

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Manufacturing And Production Technology
The snag grinding is done

To remove considerable amount of metal without regard to accuracy of the finished surface
To grind exterior cylindrical surfaces
To produce good surface finish and high degree of accuracy
Any one of the above

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