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In which of the following condition torsional vibration will not take place, considering...

Q.  
In which of the following condition torsional vibration will not take place, considering 3 rotors A, B and C. A is rotating in clockwise direction.


Answer & Explanation

Answer :   Option: C


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More Questions Dynamics of Machinery:

Q.  
Which of the following statements is/are true primary/secondary couple? 1. Secondary couple does not act on V engine 2. Primary couple acts on V engine 3. Secondary couple acts on reciprocating masses of multi-cylinder inline engines 4. Primary couple acts on reciprocating masses of multi-cylinder inline engines

A. 1 and 2

B. 2, 3 and 4

C. 1, 3 and 4

D. All of the above


Answer & Explanation

Q.  
A flywheel is mounted on a vertical shaft. The both ends of a shaft are fixed and its diameter is 50 mm. The flywheel has a mass of 500 kg, the modulus of rigidity for the shaft material is 80 GN/m2 and its radius of gyration is 0.5 m. Find the natural frequency of torsional vibrations.

A. 5.32

B. 5.86

C. 5.65

D. 6.66


Answer & Explanation

Q.  
The ratio of the intensity of sound transmitted from the boundary to the intensity of sound incident on it is called as

A. Absorption coefficient

B. Transmission coefficient

C. Reflection coefficient

D. None of these


Answer & Explanation
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