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 touch the bottom of groove in the pulley
The belt should not touch the bottom of groove in the pulley

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Machine Design
When a machine member is subjected to torsion, the torsional shear stress set up in the member is

Maximum at both the centroidal axis and outer surface of the member
Zero at the centroidal axis and maximum at the outer surface of the member
Maximum at the centroidal axis and zero at the outer surface of the member
Zero at both the centroidal axis and outer surface of the member

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