Skip to main content
DMV Test Free
ENES

Practice test 7 of 10

North Dakota CDL — Air Brakes Practice Test 7

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.North Dakota's Air Brakes section says a low air pressure warning must come on before tank pressure falls below 60 psi. What kind of signal does it require?
  2. 2.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?
  3. 3.The manual gives a separate air pressure buildup standard for single air systems on pre-1975 vehicles. Which matches its typical requirement?
  4. 4.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?
  5. 5.The manual says brake adjustment should be checked often. What reason does it give?
  6. 6.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?
  7. 7.Only your tractor has ABS; the trailer does not. During hard braking, what does the manual tell you to keep an eye on?
  8. 8.Braking creates friction and heat at the drum. What does the manual say determines how much heat a drum can take without damage?
  9. 9.According to North Dakota's edition of the manual, all vehicles built since what year have automatic slack adjusters?
  10. 10.The manual says never to leave your vehicle unattended without doing one of two things. Which pair is it?

0 of 25 answered