Technician A says primary vibration is created by the slight differences in the inertia of the pistons between top dead center and bottom dead center. Technician B says secondary vibration is a strong low-frequency vibration caused by the movement of the piston traveling up and down in the cylinder. Who is right?

Question

Quizplus · Accepted Answer

Primary vibration is typically due to the reciprocating mass of the pistons and connecting rods, while secondary vibration is a higher frequency vibration caused by the acceleration differences of the pistons as they move up and down. Neither technician accurately describes these concepts.

Technician a Says Primary Vibration Is Created by the Slight