Machine Design
The expression 0.175 - 0.841/T is the Lewis form factor for

14½° composite and full depth involute system
20° full depth involute system
None of these
20° stub system

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Machine Design
In case of V belt drive

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

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