1. Critical or whirling speed of the shaft is the speed at which it tends to vibrate violently in the transverse direction. |
2. To find the natural frequency of a shaft carrying several loads, the energy method gives approximate results. |
3. Dunkerley's method gives accurate results of the natural frequency of a shaft carrying several loads. |
A) 1 only
B) 2 and 3
C) 1 and 3
D) 1, 2 and 3
Correct Answer: A
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