Theory of Machine
A spring controlled governor is said to be stable if the controlling force line when produced intersects the Y-axis

Below the origin
Above the origin
Any one of these
At the origin

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Theory of Machine
In a steam engine, the earlier cut-off with a simple slide valve may be obtained by increasing the steam lap and the angle of advance of the eccentric but keeping constant the travel and lead of the valve, this method will

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

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Theory of Machine
Effort of a governor is the

Mean force exerted at the sleeve for a given percentage change of speed
Work-done at the sleeve for maximum equilibrium speed
None of these
Mean force exerted at the sleeve for maximum equilibrium speed

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