Skip to main content
DMV Test Free
ENES

Practice test 1 of 10

Idaho CDL — Air Brakes Practice Test 1

The Idaho CDL — Air Brakes knowledge test has ~25 questions; you need ~20 correct (80%) to pass.

This practice test follows that format: 25 questions, pass with 20 correct. Answer every page, then grade it to see the answers and explanations.

Questions 1–10 of 25

  1. 1.Which pairing of a pressure with what the manual says happens there is correct?
  2. 2.Idaho's vehicle inspection test section says the parking brake has to work whenever the vehicle is parked. Which situation does it single out?
  3. 3.Which of these does the manual treat as a sign that your brakes are fading?
  4. 4.A trainee describes a dual air brake system in four statements. Which one is mistaken, according to the manual?
  5. 5.Which of these is NOT a cold-weather precaution found in the manual's Air Brakes section?
  6. 6.Air disc brakes and s-cam brakes apply the brakes differently. What does the manual say the two designs share?
  7. 7.Which of these is NOT one of the foundation brake types described in the manual's Air Brakes section?
  8. 8.A leak is draining your air system faster than the compressor can keep up. Using the manual's typical figures, in what order will the pressure pass these points on the way down?
  9. 9.You are checking governor cut-out with the engine at a fast idle. What on the dash tells you the governor has stopped the compressor?
  10. 10.To tell whether an older trailer has ABS, the manual has you look underneath for the ECU and for wheel speed sensor wires. What is the ECU?

0 of 25 answered