Practice question

In a dual air brake system:

  1. Air tanks are shared by both systems.
  2. Each system has its own air tanks.
  3. You must designate which system you are using.
  4. Brakes on only one side of the vehicle will work.

Answer: B — Each system has its own air tanks.

The correct answer is shown above. Try the full quiz for additional practice.

Practice more: District Of Columbia CDL Air Brakes Test 2 →