In a dual air brake system:

Question

A dual air brake system is made up of two separate air brake systems. The systems share a single set of brake controls, but each has its own air tanks, hoses, and lines.

Accepted Answer

Each system has separate air tanks, hoses, and lines.

Answer

The systems share air tanks, but each has its own separate hoses and lines.

Answer

Each system uses the same lines and hoses.

Answer

One system is the main braking system and a second system is ready to be used if the first one fails.