Duo-servo drum brake systems are being discussed. Technician A says the primary shoe lining is often thicker than the secondary shoe lining. Technician B says the primary shoe typically has more lining surface area than the secondary shoe. Who is correct?
A)A only
B)B only
C)both A and B
D)neither A nor B

Question

Quizplus · Accepted Answer

In duo-servo drum brake systems, the primary shoe lining is typically thinner and has less surface area than the secondary shoe lining. The secondary shoe does more of the braking work, so it is designed to have more lining material.

Duo-Servo Drum Brake Systems Are Being Discussed