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Theory of Machine

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

0.5
2
1
1.5

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Theory of Machine
For S.H.M. cam, the acceleration of the follower at the ends of the stroke and aimed stroke respectively, is

Zero and maximum
Minimum and maximum
Maximum and zero
Zero and minimum

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Theory of Machine
The relative velocity of B with respect to A in a rigid link AB is

Parallel to AB
Perpendicular to AB
At 45° to AB
Along AB

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Theory of Machine
When the two elements of a pair have a surface contact when relative motion takes place and the surface of one element slides over the surface of the other, the pair formed is known as a

Higher pair
Self-closed pair
Lower pair
Force-closed pair

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Theory of Machine
Throw of a cam is the maximum distance of the follower from

Pitch circle
Root circle
Base circle
Prime circle

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Theory of Machine
The two elements of a pair are said to form a higher pair, when they

Have a surface contact when in motion
Permit relative motion
Have a line or point contact when in motion
Are kept in contact by the action of external forces, when in motion

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