Dynamics of Machinery (3151911) MCQs
MCQs of Free vibrations and damped free vibrations
| 41. |
Find the displacement in mm of the free longitudinal vibrations if the natural frequency is 15 Hz.
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Answer:
Option (a) |
| 42. |
A system has a mass of 0.5 kg and spring stiffness of 2452 N/m. Find the natural frequency of the system.
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Answer:
Option (c) |
| 43. |
A vertical spring-mass system has a mass of 0.5 kg and an initial deflection of 0.2 cm. Find the spring stiffness.
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Answer:
Option (d) |
| 44. |
A shaft supported in journal bearings is assumed to be __________.
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Answer:
Option (b) |
| 45. |
A shaft supported in ball bearings is assumed to be __________.
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Answer:
Option (a) |
| 46. |
What is the effect on the undamped natural frequency of a single-degree-of-freedom system if the mass of the system is increased?
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Answer:
Option (c) |
| 47. |
What is the effect on the undamped natural frequency of a single-degree-of-freedom system if the stiffness of one or more of the springs is increased?
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Answer:
Option (a) |
| 48. |
The point at which a blow may be struck on a suspended body so that the reaction at the support is zero is known as ___________.
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Answer:
Option (d) |
| 49. |
The damping provided by fluid resistance is known as ___________ .
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Answer:
Option (c) |
| 50. |
In which of the case, the factor c = 0?
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Answer:
Option (b) |
