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Theory of Machine

Theory of Machine
Ackermann steering gear consists of

Sliding pairs
Turning pairs
Rolling pairs
Higher pairs

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Theory of Machine
The Coriolis component of acceleration exists whenever a point moves along a path that has

Linear displacement
Rotational motion
Tangential acceleration
Gravitational acceleration

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Theory of Machine
The main disadvantage of the sliding pair is that it is

Wears rapidly
Difficult to manufacture
Bulky
Both (A) and (B) above

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Theory of Machine
The displacement of a flat faced follower when it has contact with the flank of a circular arc cam, is given by (where R = Radius of flank, r₁ = Minimum radius of the cam, and θ = Angle turned through by the cam)

R (1 - cosθ)
R (1 - sinθ)
(R - r₁) (1 - sinθ)
(R - r₁) (1 - cosθ)

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Theory of Machine
Whitworth quick return mechanism is obtained by inversion of

Kinematic chain
Roller cam mechanism
Five link mechanism
Slider crank mechanism

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Theory of Machine
The primary unbalanced force is maximum _________ in one revolution of the crank.

Twice
Four times
Eight times
Sixteen times

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