Skip to main content
DMV Test Free
ENES

Practice test 10 of 10

North Dakota CDL — Air Brakes Practice Test 10

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.You are doing the third component of North Dakota's three-component air brake check in a tractor-trailer, fanning the pressure down. At about what pressure does the manual say the parking brake valve and the tractor protection valve should pop out?
  2. 2.Only your tractor has ABS; the trailer does not. During hard braking, what does the manual tell you to keep an eye on?
  3. 3.The manual tells drivers to brake the same way whether or not the vehicle has ABS, with one exception. What is the exception?
  4. 4.Your brakes are very wet and the temperature is below freezing. What does the manual say can happen if you set the parking brakes now?
  5. 5.You release the brake pedal on a vehicle with s-cam brakes, and the s-cam rotates back. What draws the brake shoes back off the drum?
  6. 6.Some brake drums have openings that let you see the brake linings from outside the drum. What does North Dakota's vehicle inspection section say to check on that type of drum?
  7. 7.Foundation brakes are used at each wheel. Which type does the manual call the most common?
  8. 8.An average driver at 55 mph in an air-braked vehicle has good traction and good brakes. What does the manual give as the total stopping distance?
  9. 9.North Dakota's air brake check tells you to "fan off" the air pressure with the engine off and the key on. What does fanning off mean?
  10. 10.The manual says tractor and straight truck spring brakes come fully on somewhere between 20 and 45 psi. What narrower range does it give as typical?

0 of 25 answered