Theory of Machine
In a kinematic chain, a quaternary joint is equivalent to

One binary joint
Four binary joints
Three binary joints
Two binary joints

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Theory of Machine
The maximum fluctuation of energy is the

Difference between the maximum and minimum energies
Sum of the maximum and minimum energies
Ratio of the mean resisting torque to the work-done per cycle
Variations of energy above and below the mean resisting torque line

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