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Practice test 10 of 10

South Dakota CDL — Air Brakes Practice Test 10

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.According to the manual, what should ABS let you do while you are braking hard?
  2. 2.Section 11 explains why the air brake check matters. What does it say a loss of air pressure will cause?
  3. 3.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?
  4. 4.During the emergency brake test on the vehicle inspection test, your parking brake valve stays in until the gauge reads about 15 psi. No manufacturer specification says otherwise. How does that compare with Section 11's standard?
  5. 5.At 55 mph on dry pavement, about how much distance does air brake lag add to your stop?
  6. 6.At highway speed your low air warning light and buzzer come on. The gauge is still above the range where spring brakes apply, and the next exit is several miles ahead. What does the manual tell you to do?
  7. 7.In what way does the manual say air-operated disc brakes work like s-cam brakes?
  8. 8.You fail South Dakota's Air Brakes Test at an exam station on a Tuesday morning. When is the earliest you can try again?
  9. 9.In the final air brake check you keep fanning the pressure down until the spring brakes apply. On a single vehicle such as a straight truck, which valve should pop out?
  10. 10.Section 2 lists what to check regularly while a trip is under way. Which item on that list applies only if your vehicle has air brakes?

0 of 25 answered