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Practice test 10 of 10

Florida CDL — Air Brakes Practice Test 10

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.While inspecting a manual slack adjuster on an s-cam brake, you pull hard on it with the wheels chocked and parking brakes released. When does it need adjustment?
  2. 2.The low air pressure warning light and buzzer come on while you are rolling down the interstate. Your first responsibility is to:
  3. 3.If the safety relief valve on an air tank keeps releasing air, what should you conclude?
  4. 4.During a static leakage test on a straight truck — engine off, service brakes released — what is the most air pressure loss allowed in one minute?
  5. 5.Certain vehicles, such as buses, carry an extra air tank tied to dual parking control valves. Why is that tank there?
  6. 6.Adding perception, reaction, brake lag, and braking distance together, a heavy vehicle traveling 55 mph on good pavement needs a total stopping distance of:
  7. 7.Heading down a grade, you see the application pressure gauge creeping higher because you must press harder just to hold the same speed. What does this tell you, and what should you do?
  8. 8.What is the main cause of brake fade on a downhill run?
  9. 9.You always drive a straight truck whose antilock system is working on every axle. In a genuine emergency stop, the handbook allows you to:
  10. 10.Your older tractor has a front brake limiting valve with 'normal' and 'slippery' settings. According to the handbook, how should you use it?

0 of 25 answered