What service braking is actuated by the primary circuit on a typical tandem drive axle,air brake equipped tractor?

Question

Quizplus · Accepted Answer

The primary circuit in a typical tandem drive axle, air brake equipped tractor, is designed to actuate the drive axle brakes. This is part of a dual-circuit system where one circuit controls the drive axle brakes and the other controls the front axle brakes, ensuring redundancy and safety.

What Service Braking Is Actuated by the Primary Circuit on a Typical