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

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

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Manufacturing And Production Technology
In centreless grinding, work place centre will be

On the line joining the two wheel centres
At the intersection of the line joining the wheel centres with the work place plane
Above the line joining the two wheel centres
Below the line joining the two wheel centres

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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.
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 coolant can be poured directly at the cutting zone where the cutting force is maximum.

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