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

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

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Machine Design
A bolt

Has both the ends threaded
Has a head on one end and a nut fitted to the other
Has head at one end and other end fits into a tapped hole in the other part to be joined
Is provided with pointed threads

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Machine Design
Which is correct statement? Stress concentration in static loading is

Very serious in brittle materials and less serious in ductile materials
Equally serious in both types of materials
Very serious in ductile materials and less serious in brittle materials
Seriousness would depend on other factors

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