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Theory of Machine

Theory of Machine
The lower pairs are _________ pairs.

Self-closed
None of these
Force-closed
Friction closed

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

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Theory of Machine
If the controlling force line for a spring controlled governor when produced intersects the Y-axis at the origin, then the governor is said to be

None of the listed here
Isochronous
Stable
Unstable

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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
Base circle
Dedendum circle
Addendum circle

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Theory of Machine
The frictional torque transmitted by a disc or plate clutch is same as that of

Flat pivot bearing
Flat collar bearing
Truncated conical pivot bearing
Conical pivot bearing

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Theory of Machine
A simple spring-mass vibrating system has a natural frequency of fn. If the spring stiffness is halved and the mass is doubled, then the natural frequency will become

2 fn
fn/2
4 fn
8 fn

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