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Theory of Machine

Theory of Machine
The velocity of the rubbing surface __________ with the distance from the axis of the bearing.

Increases
None of these
Remain same
Decreases

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

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Theory of Machine
The effort of a Porter governor is equal to (where c = Percentage increase in speed, m = Mass of ball, and M = Mass on the sleeve)

c (m + M) g
c (m - M) g
c/(m + M) g
c/(m - M) g

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Theory of Machine
The Scott-Russell mechanism consists of

Sliding pairs only
Sliding and turning pairs
Turning and rotary pairs
Sliding and rotary pairs

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Theory of Machine
The Coriolis component of acceleration depends upon

Velocity of slider
Both (A) and (B)
None of these
Angular velocity of the link

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Theory of Machine
The essential condition of placing the two masses, so that the system becomes dynamically equivalent, is (where l₁ and l₂ = Distance of two masses from the centre of gravity of the body, and kG = Radius of gyration of the body)

l₂ = kG
l₁ = kG
l₁l₂ = kG
l₁l₂ = kG²

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