Machine Design
When a circular beam of diameter d is subjected to a shear force F, the maximum shear stress induced will be

6F/ πd²
16F/ 3πd²
8F/ πd²
4F/ πd²

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Machine Design
Crowning on pulley helps

In increasing the slip of the belt
To keep the belt in centre on a pulley while it is in motion
In decreasing the slip of the belt
To increase pulley life

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Machine Design
A stud

Has pointed threads
Has a head on one end and a nut fitted to the other
Has head at one end and other end fits into a tapped hole in the other part to be joined
Has both the ends threaded

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