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Theory of Machine

Theory of Machine
In a ball bearing, ball and bearing forms a

Turning pair
Rolling pair
Spherical pair
Screw pair

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Theory of Machine
The size of cam depends upon

Pitch curve
Prime circle
Base circle
Pitch circle

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Theory of Machine
The natural frequency of free torsional vibrations of a shaft is equal to (where q = Torsional stiffness of the shaft, and I = Mass moment of inertia of the disc attached at the end of a shaft)

(1/2π). √(q/I)
2π qI
1/2π
2π. √(q/I)

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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 coefficient of fluctuation of speed is __________ of maximum fluctuation of speed and the mean speed.

Ratio
Difference
Product
Sum

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Theory of Machine
The critical speed of a shaft depends upon its

Stiffness and eccentricity
Mass
Stiffness
Mass and stiffness

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MORE MCQ ON Theory of Machine

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