Theory of Machine
The Ackermann steering mechanism is preferred to the Davis type in automobiles because

The former is most economical
The former is mathematically accurate
The former is most rigid
The former is having turning pair

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Theory of Machine
Power of a governor is the

Mean force exerted at the sleeve for maximum equilibrium speed
Work-done at the sleeve for maximum equilibrium speed
None of these
Mean force exerted at the sleeve for a given percentage change of speed

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Theory of Machine
Angle of descent of cam is defined as the angle

Of rotation of the cam for a definite displacement of the follower
Through which the cam rotates during the period in which the follower remains in the highest position
During which the follower returns to its initial position
Moved by the cam from the instant the follower begins to rise, till it reaches its highest position

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