Theory of Machine
The frictional torque transmitted by a cone clutch is same as that of

Truncated conical pivot bearing
Flat collar bearing
Flat pivot bearing
Conical pivot bearing

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

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

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