Discussion
Dynamic balancing of a rotor is carried out to
Answer: A
Correct answer: reduce the vibration caused by mass eccentricity
Balancing adds or removes small masses at chosen radii until the centre of mass lies on the axis of rotation. Dynamic balancing does this in two planes at once, so that the rotor is balanced both for net force and for the couple that a long rotor can develop even when statically balanced.
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