Machine Design
An open coiled helical compression spring 'A' of mean diameter 50 mm is subjected to an axial load ‘W’. Another spring 'B' of mean diameter 25 mm is similar to spring 'A' in all respects. The deflection of spring 'B' will be __________ as compared to spring 'A'.

One-eighth
One-fourth
One-half
Double

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Machine Design
Form coefficient of spring is

Ratio of coil diameter to wire diameter
Its capability of storing energy
Load required to produce unit deflection
Concerned with strength of wire of spring

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Machine Design
The cracks in helical springs used in railway carriages usually start on the inner side of the coil because of the fact that

It has a lower curvature than the outer side
It is subjected to a higher stress than the outer side
It is more stretched than the outer side during the manufacturing process
It is subjected to a higher cyclic loading than the outer side

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