Machine Design
In cyclic loading, stress concentration is more serious in

Brittle materials
Brittle as well as ductile materials
Elastic materials
Ductile materials

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Machine Design
When the shaft rotates in anticlockwise direction at slow speed in a bearing, it will

Have contact at the bottom most of the bearing
Move towards right of the bearing making the metal to metal contact
Move towards right of the bearing making no metal to metal contact
Move towards left of the bearing making metal to metal contact

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Machine Design
A bolt of M 24 × 2 means that

The nominal diameter of bolt is 24 mm and pitch is 2 mm
Cross-sectional area of the threads is 24 mm²
The pitch of the thread is 24 mm and depth is 2 mm
The effective diameter of bolt is 24 mm and there are 2 threads per cm

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Machine Design
A bolt

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
Has a head on one end and a nut fitted to the other
Is provided with pointed threads

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