Manufacturing And Production Technology
Jigs are used

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

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Manufacturing And Production Technology
Glazing in grinding wheels takes place when the

Wheel is too hard and wheel revolves at very slow speed
Wheel is too soft or wheel revolves at a very slow speed
Wheel is too hard or wheel revolves at a very high speed
Wheel is too soft and wheel revolves at a very high speed

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