Machine Design
The maximum stress due to stress concentration in a bar having circular transverse hole, as compared to its static stress without hole will be

2 times more
Same in both cases
4 times more
3 times more

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Machine Design
The elasticity is the property of a material which enables it to

Retain deformation produced under load permanently
Draw into wires by the application of a tensile force
Resists fracture due to high impact loads
Regains its original shape after deformation when the external forces are removed

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