Question

For a V-twin engine, which of the following means can be used to balance the primary forces?

(a) Revolving balance mass

(b) Rotating balance mass

(c) Reciprocating balance mass

(d) By the means of secondary forces

The question was posed to me in an interview for internship.

This is a very interesting question from Balancing of V-engines in chapter Balancing of Reciprocating Masses of Machine Dynamics

Answer 1

Correct answer is (a) Revolving balance mass

The explanation: We know that primary resultant force depends on speed of revolution, mass and radius of rotation. Hence revolving mass can be used to balance the primary forces.