Theory of Machine
The example of successfully constrained motion is a

All of these
Piston reciprocating inside an engine cylinder
Motion of the shaft between a footstep bearing
Motion of an I.C. engine valve

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Theory of Machine
Pitch point on a cam is

Any point on pitch curve
The point on cam pitch curve having the minimum pressure angle
The point on cam pitch curve having the maximum pressure angle
Any point on pitch circle

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Theory of Machine
In elliptical trammels

One pair turning and three pairs sliding
All four pairs are turning
Three pairs turning and one pair sliding
Two pairs turning and two pairs sliding

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