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 chips are disposed off easily and do not interfere with the cutting.
The surface milled appears to be slightly wavy.

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Manufacturing And Production Technology
During normalizing process of steel, the specimen is heated

Between the upper and lower critical temperature and cooled in furnace.
Between the upper and lower critical temperature and cooled in still air.
Above the upper critical temperature and cooled in furnace.
Above the upper critical temperature and cooled in still air.

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