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Theory of Machine

Theory of Machine
A rigid body possesses ________degrees of freedom

Two
Six
One
Four

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Theory of Machine
The acceleration of a flat-faced follower when it has contact with the flank of a circular arc cam, is given by

ω² (R - r₁) sinθ
ω² R cosθ
ω² (R - r₁) cosθ
ω² r₁ sinθ

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Theory of Machine
The stress induced in a body will be shear stress, when it is subjected to

Transverse vibrations
Torsional vibrations
None of these
Longitudinal vibrations

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Theory of Machine
In vibration isolation system, if ω/ωn < 2, then for all values of damping factor, the transmissibility will be (where ω = Angular speed of the system, ωn = Natural frequency of vibration of the system)

Equal to unity
Zero
Less than unity
Greater than unity

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Theory of Machine
A system in dynamic balance implies that

There is no critical speed in the system
The system is also statically balanced
There will absolutely no wear of bearings
The system is critically damped

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Theory of Machine
It is required to connect two parallel shafts, the distance between whose axes is small and variable. The shafts are coupled by

Flexible coupling
Universal joint
Knuckle joint
Oldham's coupling

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