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Theory of Machine

Theory of Machine
In a vibrating system, if the actual damping coefficient is 40 N/m/s and critical damping coefficient is 420 N/m/s, then logarithmic decrement is equal to

0.2
0.8
0.6
0.4

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Theory of Machine
The height of a Watt's governor (in meters) is equal to (where N = Speed of the arm and ball about the spindle axis)

8.95/N²
8950/N²
895/N²
89.5/N²

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Theory of Machine
For a kinematic chain to be considered as mechanism

One link should be fixed
There is no such criterion
Two links should be fixed
None of the links should be fixed

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Theory of Machine
When a point moves along a straight line, its acceleration will have

Radial component only
Radial and tangential components both
Tangential component only
Coriolis component only

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Theory of Machine
The component of the acceleration, perpendicular to the velocity of the particle, at the given instant is called

Tangential component
None of these
Radial component
Coriolis component

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Theory of Machine
If ω/ωn = 2, where co is the frequency of excitation and ωn is the natural frequency of vibrations, then the transmissibility of vibration will the

2
1.5
0.5
1

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