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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

1
0.5
2
1.5

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Theory of Machine
The length of a simple pendulum which gives the same frequency as the compound pendulum, is

(kG + l₁²)/ l₁
kG + l₁
kG² + l₁
(kG² + l₁²)/ l₁

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Theory of Machine
Longitudinal vibrations are said to occur when the particles of a body moves

Parallel to its axis
Perpendicular to its axis
None of these
In a circle about its axis

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Theory of Machine
The maximum value of the pressure angle in case of cam is kept as

10°
20°
30°
14°

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Theory of Machine
Sense of tangential acceleration of a link

Is perpendicular to that of velocity
Could be either same or opposite to velocity
Is opposite to that of velocity
Is same as that of velocity

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Theory of Machine
In a steam engine, the link constitutes a

Crank pin, crankshaft and flywheel
All of these
Piston, piston rod and cross-head
Connecting rod with big and small end brasses, caps and bolts

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