Dynamics of Machinery (3151911) MCQs
MCQs of Free vibrations and damped free vibrations
| 71. |
A shaft carrying two rotors will have
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Answer:
Option (b) |
| 72. |
A shaft carrying three rotors will have
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Answer:
Option (c) |
| 73. |
________ torsional vibrations will occur in a two-rotor system only if both rotors have the same frequency.
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Answer:
Option (a) |
| 74. |
In a two-rotor system, torsional vibration occurs only if the rotors are moving in the ______ direction.
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Answer:
Option (b) |
| 75. |
Keeping the mass moment of inertia of both the shafts in a two-rotor system same, if the length of one shaft is doubled what should be the effect on the length of another shaft?
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Answer:
Option (a) |
| 76. |
For a two-rotor system, the length of one shaft (A) is twice the shaft (B), then what is the relation between the mass moment of inertia of the shafts?
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Answer:
Option (a) |
| 77. |
For a two-rotor system, the mass moment of inertia of one shaft (A) is twice the other (B), then what is the relation between the length of the shafts?
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Answer:
Option (a) |
| 78. |
In which of the following condition torsional vibration will not take place, considering 3 rotors A, B and C. A is rotating in the clockwise direction.
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Answer:
Option (c) |
| 79. |
For the occurrence of free torsional vibration in a three-rotor system which of the condition is necessary?
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Answer:
Option (b) |
| 80. |
What is the total number of nodes formed in a three-rotor system if the rotors at one of the ends and the one in the middle rotate in the same direction?
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Answer:
Option (b) |
