Dynamics of Machinery (3151911) MCQs
MCQs of Free vibrations and damped free vibrations
| 51. |
A certain amount of energy possessed by the vibrating system is always dissipated in overcoming __________ to the motion.
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Answer:
Option (c) |
| 52. |
The unit of the damping factor is ______.
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Answer:
Option (d) |
| 53. |
The unit of the damping coefficient is ______.
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Answer:
Option (b) |
| 54. |
Calculate mass from the following data: critical damping coefficient= 6283 N/m/s and ω = 10 rad/s.
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Answer:
Option (c) |
| 55. |
Calculate critical damping coefficient in N/m/s from the following data: mass = 100 Kg and ω = 40rad/s.
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Answer:
Option (a) |
| 56. |
A system has a mass of 600 Kg has a spring of stiffness 294000 N/m. What will be the value of the critical damping coefficient?
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Answer:
Option (b) |
| 57. |
A gun barrel of mass 600 Kg has a recoil spring of stiffness 294 KN/m. If the barrel recoils 1.3 m on firing, what will be the initial recoil velocity of the barrel?
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Answer:
Option (a) |
| 58. |
The damping factor is the measure of the relative amount of damping in the existing system with that necessary for the ______ system.
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Answer:
Option (c) |
| 59. |
In which of the following cases, critical damping occurs?
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Answer:
Option (c) |
| 60. |
In which of the following cases, under damping occurs?
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Answer:
Option (b) |
