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

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

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Theory of Machine
In a steam engine, one method of obtaining the earlier cut-off with a simple slide valve is by increasing the angle of advance of the eccentric while the throw of the eccentric, steam lap and exhaust lap are kept constant. This method will

Cause withdrawing or throttling of steam
Reduce length of effective stroke of piston
All of these
Reduce maximum opening of port to steam

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