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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

1.5
1
0.5
2

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Theory of Machine
In vibration isolation system, the transmissibility will be equal to unity, for all values of damping factor, if ω/ωn is

Equal to 2
Less than 2
Greater than 2
Equal to 1

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Theory of Machine
In a four-bar chain it is required to give an oscillatory motion to the follower for a continuous rotation of the crank. For the lengths of 50 mm of crank and 70 mm of the follower, determine theoretical maximum length of coupler. The distance between fixed pivots of crank and followers is

45 mm
Slightly less than 95 mm
95 mm
Slightly more than 95 mm

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Theory of Machine
In automobiles the power is transmitted from gear box to differential through

Bevel gear
Universal joint
Hooke's joint
Knuckle joint

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Theory of Machine
A reed type tachometer use the principle of

Damped free vibration
Transverse vibration
Longitudinal vibration
Torsional vibration

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Theory of Machine
Which of the following is an example of sliding pair?

Lead screw of a lathe with nut
Piston and cylinder of a reciprocating steam engine
Ball and a socket joint
Shaft with collars at both ends fitted into a circular hole

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