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Practice test 6 of 10

Texas CDL — Air Brakes Practice Test 6

The Texas 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.In Texas, you take the CDL skills test in a truck that is not equipped with air brakes. What happens to your license?
  2. 2.Why is it a bad habit to press and release the brake pedal over and over when you don't need to?
  3. 3.Which part of an air brake system pumps the compressed air that the brakes depend on?
  4. 4.What job does an alcohol evaporator perform in some air brake systems?
  5. 5.A roadside inspector finds a vehicle's brakes out of adjustment and its air system leaking beyond the allowed rate. What can happen to that vehicle?
  6. 6.The parking and emergency brakes on trucks, tractors, and buses have to be held on by mechanical force such as springs. Why can't air pressure do that job?
  7. 7.Before starting down a long, steep grade in an air-braked vehicle, when should you shift into the proper low gear?
  8. 8.You want a Texas CDL with no air brake restriction. Which pair of requirements must you meet?
  9. 9.What is a "wig wag" on an air-braked vehicle?
  10. 10.The yellow ABS malfunction lamp stayed lit after the start-up bulb check and is still on as you cruise down the highway. What does that tell you?

0 of 25 answered