Machine Design
The shearing stresses in the inner face as compared to outer face of the wire in a heavy close coiled spring is

Larger
Larger/smaller depending on diameter of spring coil
Smaller
Equal

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Machine Design
The plasticity 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
Regain its original shape after deformation when the external forces are removed
Resist fracture due to high impact loads

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