Manufacturing And Production Technology
A bottoming tap has

Full threads for the whole of its length
None of these
Its end tapered for about three or four threads
Its end tapered for about eight or ten threads

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

The coolant can be poured directly at the cutting zone where the cutting force is maximum.
It can not be used on old machines due to backlash between the feed screw of the table and the nut.
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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