Theory of Machine
For dynamic balancing of a shaft

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

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Theory of Machine
Angle of ascent of cam is defined as the angle

Of rotation of the cam for a definite displacement of the follower
Through which the cam rotates during the period in which the follower remains in highest position
During which the follower returns to its initial position
Moved by the cam from the instant the follower begins to rise, till it reaches its highest position

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Theory of Machine
In a mechanism, the fixed instantaneous centers are those centers which

None of the listed here
Remain in the same place for all configurations of the mechanism
Moves as the mechanism moves, but joints are of permanent nature
Vary with the configuration of the mechanism

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