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Practice test 2 of 10

North Dakota CDL — Air Brakes Practice Test 2

The North Dakota 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.Someone pulls out suddenly in front of you, and there is enough distance to stop. How does the manual say you should brake?
  2. 2.Foundation brakes are used at each wheel. Which type does the manual call the most common?
  3. 3.Which of these is NOT one of the three braking systems that the manual says make up air brakes?
  4. 4.Brakes are built to take a lot of heat, yet they can fade or fail from too much of it. What driving habit does the manual blame for that excessive heat?
  5. 5.The final air brake check ends with a service brake test: you roll forward at roughly five mph and brake firmly. Which of these is NOT something the manual tells you to note?
  6. 6.Only your tractor has ABS; the trailer does not. During hard braking, what does the manual tell you to keep an eye on?
  7. 7.In the modernized air leakage rate test, a straight truck is pulling a trailer that has no air brakes. With the foot brake held for one minute after the gauge stabilizes, what is the most the pressure may drop?
  8. 8.An older truck, made before 1975, has a front brake limiting valve with a cab control marked "normal" and "slippery." What happens to the front brakes in the "slippery" position?
  9. 9.You are making an emergency stop with the controlled braking method. In which situation does the manual say to release the brakes?
  10. 10.In stab braking you release the brakes when the wheels lock and reapply once they roll. After the release, how long does the manual say it can take the wheels to start rolling?

0 of 25 answered