Manufacturing And Production Technology
Jigs are used

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

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Manufacturing And Production Technology
The chamfering is an operation of

Beveling the extreme end of a workpiece
Reducing the diameter of a workpiece over a very narrow surface
Enlarging the end of a hole cylindrically
Embossing a diamond shaped pattern on the surface of a workpiece

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Manufacturing And Production Technology
Which of the following statement is wrong as regard to down milling?

It can not be used on old machines due to backlash between the feed screw of the table and the nut.
The coolant can be poured directly at the cutting zone where the cutting force is maximum.
The surface milled appears to be slightly wavy.
The chips are disposed off easily and do not interfere with the cutting.

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