Practice question

The air pressure in a dual air brake system should build from 85 to 100 psi within:

  1. Two minutes.
  2. 15 seconds.
  3. 10 minutes.
  4. 45 seconds.

Answer: D — 45 seconds.

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

Practice more: Kansas CDL Air Brakes Test 1 →