Theory of Machine
The pressure angle of a cam depends upon

Angle of ascent
All of these
Offset between center lines of cam and follower
Lift of follower

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Theory of Machine
In a four bar chain or quadric cycle chain

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

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

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