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- Dynamics of Machinery Test Questions - Set 5
MCQs 1: In damped free vibrations, which parameters indicate vibrations?
MCQs 2: Calculate natural frequency of damped vibration, if damping factor is 0.52 and natural frequency of the system is 30 rad/sec which consists of machine supported on springs and dashpots.
MCQs 3: At which frequency ratio, phase angle increases as damping factor increases?
When frequency ratio is less than unity
When frequency ratio is more than unity
When frequency ratio is zero
All of the above
MCQs 4: What is the effect of damping on phase angle at resonance frequency?
Phase angle increases as damping increases
Damping has no effect on phase angle
Phase angle increases as damping decreases
None of the above
MCQs 5: Calculate damped natural frequency, if a spring mass damper system is subjected to periodic disturbing force of 30 N. Damping coefficient is equal to 0.76 times of critical damping coefficient and undamped natural frequency is 5 rad/sec
MCQs 6: Calculate critical speed of a vehicle which moves on a road having sinusoidal profile of wavelength 2.5 m. The mass of the vehicle is 300 kg and natural frequency of its spring suspension system is 8 rad/sec
MCQs 7: What is meant by node point?
The point at which amplitude of vibration is maximum
The point at which amplitude of vibration is minimum
The point at which amplitude of vibration is zero
None of the above
MCQs 8: What is meant by coupled differential equation?
The differential equation in which only rectilinear motions exit
The differential equation in which only angular motions exit
The differential equation in which both rectilinear and angular motions exit
None of the above
MCQs 9: The motion of a system executing harmonic motion with one natural frequency is known as _______
MCQs 10: Which of the following instruments measure amplitude of a vibrating body?
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