Theory of Machine
In a Hartnell governor, if a spring of greater stiffness is used, then the governor will be

Isochronous
More sensitive
Unaffected of sensitivity
Less sensitive

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Theory of Machine
In a single slider crank chain

Three are turning pairs and one is a sliding pair
One is a turning pair and three are sliding pairs
Each of the four pairs is a turning pair
Two are turning pairs and two are sliding pairs

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