What is the main purpose of a dual air brake system on a modern truck?

• A.It provides two separate air circuits so that if one fails, the other can still stop the vehicle
• B.It doubles the top speed the brakes can handle
• C.It allows the driver to use either foot on the brake pedal
• D.It eliminates the need for air reservoirs

Why

A dual system splits the air supply into primary and secondary circuits for redundancy. If one circuit loses pressure, the other still operates part of the brakes, although stopping distance will increase.

Manual topic: Air Brakes - Dual Air Brake Systems · From the Air Brakes practice bank (AB-001).

Practice this subject as a full test

More Dual Air Brake System & Components questions

• In a dual air brake system, what does the primary system typically control?
• In a dual air brake system, what does the secondary system typically control?
• How can a driver monitor a dual air brake system while driving?
• If one circuit of a dual air brake system fails completely, what should the driver expect?
• What part applies the service brakes when air pressure is delivered to it at each wheel?