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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
0.5
2
1

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Theory of Machine
When a ship travels in a sea, which of the effect is more dangerous

All of these
Rolling
Steering
Pitching

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Theory of Machine
In a rigid link OA, velocity of 'A' w.r.t. 'O' will be

Along AO
At 45° to OA
Perpendicular to OA
Parallel to OA

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Theory of Machine
In an ideal machine, the output as compared to input is

Less
May be less or more depending on efficiency
More
Equal

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Theory of Machine
The values of velocity and acceleration of piston at near dead center for a slider-crank mechanism will be

0, and less than coV
cor, 0
0, 0
0, and more than co2r

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Theory of Machine
If ω/ωn is very low for a body vibrating under steady state vibrations, the phase angle for all values of damping factors, will tend to approach

90°
180°
360°
0°

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