The purpose of the retarders is to:

Question

Accepted Answer

B: Help slow the vehicle while driving and reduce brake wear.. Brake retarders may be of four types; engine, exhaust, hydraulic, or electrical. They are designed to reduce the speed of a vehicle similar to engine braking. This prolongs the life of the service brake components that are applied when the brake pedal is depressed.

The purpose of the retarders is to:

Illinois CDL General Knowledge Test Info