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Theory of Machine

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

3π Hz
3 Hz
6 Hz
6π Hz

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Theory of Machine
When the relation between the controlling force (Fc) and radius of rotation (r) for a spring controlled governor is Fc = ar + b, then the governor will be

Isochronous
None of these
Unstable
Stable

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Theory of Machine
When two pulleys are connected by means of a cross belt drive, then both the pulleys will rotate in _________ directions.

Perpendicular
None of these
Same
Opposite

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Theory of Machine
Coriolis component is encountered in

Slider crank mechanism
Both (A) and (C) above
Four bar chain mechanism
Quick return mechanism of shaper

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Theory of Machine
According to Kennedy's theorem, if three bodies have plane motions, their instantaneous centers lie on A. A triangle

Two lines
A triangle
A straight line
A point

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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

1.5
0.5
2
1

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