Primary and secondary couple

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
- Published on 11 Sep 15

a. 1 and 2
b. 2, 3 and 4
c. 1, 3 and 4
d. All of the above

ANSWER: 1, 3 and 4

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