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Which of the following statements is/are true primary/secondary couple? 1. Secondary couple does...

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


Answer & Explanation

Answer :   Option: C


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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

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B. Transmission coefficient

C. Reflection coefficient

D. None of these


Answer & Explanation
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