Theory of Machine
For dynamic balancing of a shaft

The net dynamic force acting on the shaft is equal to zero
None of these
Both (A) and (B)
The net couple due to the dynamic forces acting on the shaft is equal to zero

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Theory of Machine
In elliptical trammels

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

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