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Practice test 6 of 10

South Dakota CDL — Air Brakes Practice Test 6

The South 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.Air brakes are really three braking systems. Which one puts the brakes on and lets them off as you work the brake pedal in ordinary driving?
  2. 2.Your trailer has ABS but your tractor does not. Under hard braking the tractor begins to jackknife. What does the manual tell you to do?
  3. 3.During South Dakota's vehicle inspection test you leave the cab to continue the inspection outside. What does Section 11 require as you exit the vehicle?
  4. 4.The first part of the air brake check on the vehicle inspection test has you build pressure until the governor cuts out. Unless the manufacturer specifies another level, about where does Section 11 say that happens?
  5. 5.You have just come down a steep grade and your brakes are very hot. What does the manual say about setting the parking brakes right away?
  6. 6.What score does South Dakota require to pass the Air Brakes Test, like every other CDL knowledge test?
  7. 7.What links the air compressor to the engine?
  8. 8.Section 11's air warning device test names three low air warning devices. A buzzer and a light are two of them. What is the third?
  9. 9.Which of these parts plays NO role in applying an s-cam drum brake?
  10. 10.With air brakes, about how long does the manual say it takes for air to travel through the lines to the brakes after you push the pedal?

0 of 25 answered