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Practice test 4 of 10

Florida CDL — Air Brakes Practice Test 4

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.In an emergency stop, 'controlled braking' means:
  2. 2.You are stab braking during an emergency stop and the wheels lock up. When do you put the brakes back on?
  3. 3.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?
  4. 4.In Florida, what happens to your CDL if you pass the skills test in a truck that does not have a full air brake system?
  5. 5.During the air brake check, you turn on the electrical power and pump the brake pedal to bleed the system down. The low air pressure warning must activate before the tank pressure drops below:
  6. 6.What information does the supply pressure gauge on the dash give you?
  7. 7.Roadside inspectors most often place air-braked vehicles out of service for which brake problem?
  8. 8.Most newer heavy vehicles are built with dual air brake systems. What does that mean?
  9. 9.The parking and emergency brakes on trucks, tractors, and buses must be held on by mechanical force, usually powerful springs, rather than by air. What is the reason?
  10. 10.Some air brake systems include an alcohol evaporator. What job does it do?

0 of 25 answered