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Theory of Machine

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

180°
90°
360°
0°

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Theory of Machine
The critical speed of a shaft in revolution per second is __________ as that of natural frequency of transverse vibration.

Unpredictable
None of these
Same
Different

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Theory of Machine
Under logarithmic decrement, the amplitude of successive vibrations are

In arithmetic progression
In geometric progression
In logarithmic progression
Constant

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Theory of Machine
Balancing of rotating and reciprocating parts of an engine is necessary when it runs at

Slow speed
Moderate speed
Any one of these
Highs peed

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Theory of Machine
The natural frequency of free longitudinal vibrations is equal to (where m = Mass of the body, s = Stiffness of the body, and δ = Static deflection of the body)

0.4985/√δ
Any one of the listed here
1/2π × √(s/m)
1/2π × √(g/δ)

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Theory of Machine
The Coriolis component of acceleration depends upon

Angular velocity of the link
Velocity of slider
None of these
Both (A) and (B)

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