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Practice test 8 of 10

Florida CDL — Air Brakes Practice Test 8

The Florida 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.Unlike hydraulic brakes, air brakes have a built-in delay because air must travel through the lines. About how long is that brake lag?
  2. 2.What does a good normal service-brake stop feel like in a bus or truck with air brakes?
  3. 3.What is the main cause of brake fade on a downhill run?
  4. 4.Why should you avoid pressing the brake pedal down while the spring brakes are applied?
  5. 5.If the safety relief valve on an air tank keeps releasing air, what should you conclude?
  6. 6.You are about to park for the night in freezing weather, and your brakes are soaking wet from slush. What does the handbook suggest doing first?
  7. 7.At 55 mph, how much extra distance does air brake lag alone add to your stop?
  8. 8.The yellow ABS malfunction lamp stays lit after the start-up bulb check and is still on once you are rolling. What does that tell you?
  9. 9.Most newer heavy vehicles are built with dual air brake systems. What does that mean?
  10. 10.What does the stop light switch do in an air brake system?

0 of 25 answered