Theory of Machines - GATE practice papers - Mechanical for Q. 360

Q.  Which of the following statements is wrong?

(1) A statically balanced rotor is always dynamically balanced
(2) A dynamically balanced rotor is always statically balanced (Marks: 02)
- Published on 19 Oct 15

a. Only (1)
b. Only (2)
c. both (1) and (2)
d. both are correct

ANSWER: Only (1)
 
When rotor is dynamically balanced then it is always statically balanced. But when rotor is statically balanced then it may or may not be dynamically balanced.

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