A dual air brake system:

Question

A dual air brake system has two separate air brake systems that use a single set of brake controls. One system typically operates the regular brakes on the rear axle or axles. The other system operates the regular brakes on the front axle.

Accepted Answer

Has two separate air brake systems, but uses a single set of controls.

Answer

Has a single air brake system, but uses two sets of controls.

Answer

Has one air brake system for each side of the truck.

Answer

Has two brakes for each wheel.