Theory of Machine
The Ackerman steering gear mechanism is preferred to the Davis steering gear mechanism, because

The Ackerman steering gear is most economical
Both (A) and (B)
Whole of the mechanism in the Ackerman steering gear is on the back of the front wheels
The Ackerman steering gear consists of turning pairs

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Theory of Machine
The maximum fluctuation of energy is the

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

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