Machine Design
Resistance to fatigue of a material is measured by

Coefficient of elasticity
Endurance limit
Young's modulus
Elastic limit

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Machine Design
Form coefficient of spring is

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

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Machine Design
Which is correct statement?

A member made of steel will generally be more rigid than a member of equal load carrying ability made of cast iron
Both will be equally rigid
Which one is rigid will depend on several other factors
A member made of cast iron will generally be more rigid than a member of equal load carrying ability made of steel

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Machine Design
Spring index is

Indication of quality of spring
Load required to produce unit deflection
Ratio of coil diameter to wire diameter
Its capability of storing energy

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