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Theory of Machine

Theory of Machine
If ω/ωn is very high for a body vibrating under steady state vibrations, the phase angle for all values of damping factors, will tend to approach

0°
180°
360°
90°

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Theory of Machine
In a steam engine, the link constitutes a

Connecting rod with big and small end brasses, caps and bolts
All of these
Crank pin, crankshaft and flywheel
Piston, piston rod and cross-head

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

None of these
Decreases
Increases
Remain same

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

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Theory of Machine
The angle of inclination of the plane, at which the body begins to move down the plane is called

Angle of friction
None of these
Angle of repose
Angle of projection

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Theory of Machine
The equation of free vibrations of a system is (d²x/dt²) +36 π²x, its natural frequency is

6 Hz
6π Hz
3π Hz
3 Hz

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