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Mechanical Engineering Objective Questions { Theory of Machines }



295. For a vibrating body under steady state forced vibrations, if ratio 6)/0)? is very high, then phase/angle would tend to approach
A.0?
B.90?
C.180?
D.270?,
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296. If the damping factor for a. vibrating system is unity, then the system is
A.Critically damped
B.Not damped
C.Under damped
D.Over damped
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297. In a damped vibration system, the damping force is proportional to
A.Displacement
B.Velocity
C.Acceleration
D.Vibrations
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298. For a vibrating body under steady state forced vibrations, if ratio co/co,, is very low, the phase angle would tend to -approach
A.0?
B.90?
C.180?
D.270?
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299. Which of the following effects is more dangerous for a ship
A.Rolling
B.Waving
C.Pitching
D.Steering
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