Theory of Machine
The swaying couple is maximum or minimum when the angle of inclination of the crank to the line of stroke (θ) is equal to

180° and 270°
90° and 180°
270° and 360°
45° and 225°

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Theory of Machine
The maximum fluctuation of energy is the

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

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