Theory of Machine
Instantaneous center of rotation of a link in a four bar mechanism lies on

Left side pivot of this link
Right side pivot of this link
Can’t occur
A point obtained by intersection on extending adjoining links

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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

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

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