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

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

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Machine Design
Pitch point of a cam is

A point on the pitch curve having maximum pressure angle
Any point on the pitch circle
A point on the pitch curve having minimum pressure angle
Any point on the pitch curve

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