Machine Design
The shear plane in case of bolts should

Be normal to threaded portion of shank
Be across threaded portion of shank
Never be across the threaded portion
Be parallel to axis of bolt

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Machine Design
For unequal width of butt straps, the thicknesses of butt straps are

0.75 t for wide strap on the inside and 0.625 t for narrow strap on the outside
0.75 t for narrow strap on the inside and 0.625 t for wide strap on the outside
0.75 t for both the straps on the inside and outside
0.625 t for both the straps on the inside and outside

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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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