Machine Design
According to Indian standards, the diameter of rivet hole is made larger than the basic size of rivet by

2 mm for rivet diameter from 39 mm to 48 mm
1 mm for rivet diameter from 27 mm to 36 mm
All of these
0.5 mm up to rivet diameter of 24 mm

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

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