Theory of Machine
Crowning on pulleys helps

In decreasing the slip of the belt
Increase belt and pulley life
In increasing velocity ratio
For automatic adjustment of belt position so that belt runs centrally

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Theory of Machine
In order to give the primary balance of the reciprocating parts of a multi-cylinder inline engines

The algebraic sum of the couples about any point in the plane of the primary forces must be equal to zero
The algebraic sum of the primary forces must be equal to zero
Both (A) and (B)
None of these

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