Theory of Machine
Oldham’s coupling is an inversion of the kinematic chain used in

Rotary engine
Elliptical trammels
Whitworth quick return mechanism
Universal joint

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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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