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Theory of Machine

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

Mass and stiffness
Stiffness and eccentricity
Stiffness
Mass

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Theory of Machine
The ratio of the driving tensions for V-belts is __________ times that of flat belts.(Where β = Semi-angle of the groove)

cosecβ
cosβ
sinβ
secβ

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Theory of Machine
The relation between the controlling force (Fc) and radius of rotation (r) for a stable spring controlled governor is

Fc = a/r + b
Fc = ar - b
Fc = ar + b
Fc = ar

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Theory of Machine
In a gear having involute teeth, the normal to the involute is a tangent to the

Pitch circle
Addendum circle
Base circle
Dedendum circle

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Theory of Machine
In a mechanism, usually one link is fixed. If the fixed link is changed in a kinematic chain, then relative motion of other links

Will remain same
Will not occur
Could change or remain unaltered depending on which link is fixed
Will change

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Theory of Machine
For simple harmonic motion of the of follower, a cosine curve represents

Displacement diagram
All of these
Acceleration diagram
Velocity diagram

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