Machine Design
When the speed of belt increases,

The power transmitted will increase
The power transmitted will decrease
The coefficient of friction between the belt and pulley decreases
The coefficient of friction between the belt and pulley increases

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

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

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Machine Design
A bolt of uniform strength can be developed by

Keeping the core diameter smaller than the diameter of the unthreaded portion
None of these
Keeping the nominal diameter of threads equal to the diameter of unthreaded portion of the bolt
Keeping the core diameter of threads equal to the diameter of unthreaded portion of the bolt

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Machine Design
In case of V belt drive

None of these
The belt should not touch the sides of groove in the pulley
The belt should not touch the bottom of groove in the pulley
The belt should touch the bottom of groove in the pulley

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