Theory of Machine
The motion of a shaft in a circular hole is an example of

Successfully constrained motion
Completely constrained motion
Incompletely constrained motion
None of these

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Theory of Machine
In a cone pulley, if the sum of radii of the pulleys on the driving and driven shafts is constant, then

The drive is recommended depending upon the torque transmitted
Open belt drive is recommended
Crossed belt drive is recommended
Both open belt drive and crossed belt drive is recommended

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