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Practice test 3 of 10

North Dakota CDL — Air Brakes Practice Test 3

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 manual prints the air brake check for both its older vehicle inspection test and the modernized skills test the state began phasing in. How do the two versions break the check down?
  2. 2.Your truck's air compressor has its own oil supply instead of sharing the engine's oil. What does the manual tell you to do?
  3. 3.North Dakota's air leakage test first times the pressure drop with the parking brake released. For the second part, how much pressure does the manual say to apply with the brake pedal?
  4. 4.Automatic air tank drains are available with electric heating devices. What does the manual say the heaters are for?
  5. 5.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?
  6. 6.Something has gone wrong, and tank pressure keeps climbing well past the governor's usual cut-out level. At what pressure does the manual say the safety relief valve typically opens?
  7. 7.Outside of brake maintenance and adjuster installation, when does the manual accept manually adjusting an automatic slack adjuster?
  8. 8.The manual says brake adjustment should be checked often. What reason does it give?
  9. 9.The ABS requirement for air-braked vehicles took effect on two different dates. Which vehicles does the manual say came first?
  10. 10.Among North Dakota's numbered tips for preparing for the CDL road test, what does the manual say you must do to avoid an "airbrakes" restriction?

0 of 25 answered