Manufacturing And Production Technology
A bottoming tap has

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

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

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

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