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Theory of Machine

Theory of Machine
In S.H.M., the velocity vector w.r.t. displacement vector

Lags by 90°
Leads by 90°
Leads by 180°
Are in phase

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Theory of Machine
A circle passing through the pitch point with its center at the center of cam axis is known as

Base circle
Outer circle
Prime circle
Pitch circle

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Theory of Machine
The frictional torque transmitted in a conical pivot bearing, considering uniform pressure, is (where R = Radius of shaft, and α = Semi-angle of the cone)

μ W R cosecα
(2/3) μ W R cosecα
(1/2) μ W R cosecα
(3/4) μ W R cosecα

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Theory of Machine
In gramophones for adjusting the speed of the turntable, the following type of governor is commonly employed

Inertia governor
Hartung governor
Pickering governor
Wilson Hartnell governor

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Theory of Machine
A foot step bearing and rotor of a vertical turbine form examples of

Partially constrained motion
Incompletely constrained motion
Successfully constrained motion
Completely constrained motion

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Theory of Machine
Which of the following is a spring controlled governor?

Hartung governor
Hartnell governor
All of these
Wilson-Hartnell governor

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