Manufacturing And Production Technology
A better machinable metal is one which gives

Lower chip-tool contact area and larger shear angle
Higher chip-tool contact area and smaller shear angle
Lower chip-tool contact area and smaller shear angle
Higher chip-tool contact area and larger shear angle

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

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

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