Railways Technical Ability Vibration Analysis Question Bank Vibration Analysis

  • question_answer Consider the following statements:        
    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.
    Which of these statements is/are correct? 

    A) 1 only              

    B) 2 and 3

    C) 1 and 3            

    D) 1, 2 and 3  

    Correct Answer: A


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