Theory of Machine
Frequency of vibrations is usually expressed in

Number of cycles per minute
Number of cycles per hour
None of these
Number of cycles per second

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

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 is most economical
The Ackerman steering gear consists of turning pairs

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