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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

2
0.5
1.5
1

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Theory of Machine
When a body is subjected to transverse vibrations, the stress induced in a body will be

Tensile stress
Compressive stress
Bending stress
Shear stress

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Theory of Machine
The lower pair is a

Open pair
Point contact pair
Sliding pair
Closed pair

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Theory of Machine
A typewriter mechanism has 7 numbers of binary joints, six links and none of higher pairs. The mechanism is

Not sound
Data is not sufficient to determine same
Soundness would depend upon which link is kept fixed
Kinematically sound

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Theory of Machine
Which of the following is a lower pair?

Piston and cylinder
Cam and follower
Both (A) and (B) above
Ball and socket i

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Theory of Machine
The effort of a Porter governor is equal to (where c = Percentage increase in speed, m = Mass of ball, and M = Mass on the sleeve)

c/(m - M) g
c/(m + M) g
c (m + M) g
c (m - M) g

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