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Practice test 9 of 10

Florida CDL — Air Brakes Practice Test 9

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.Any time you park a vehicle that has air brakes, the rule is to:
  2. 2.How does a Z restriction on a CDL differ from an L restriction?
  3. 3.As you use the brakes and air pressure in the tanks drops, at roughly what pressure does the governor put the compressor back to work?
  4. 4.At 55 mph, how much extra distance does air brake lag alone add to your stop?
  5. 5.Using the proper braking technique on a long downgrade, you have reached your safe speed of 40 mph in a low gear. What comes next?
  6. 6.During your pre-trip you find cracked brake drums and an audible air leak at a brake chamber. What are you required to do?
  7. 7.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:
  8. 8.Some air brake systems include an alcohol evaporator. What job does it do?
  9. 9.For a vehicle with air brakes, total stopping distance is made up of which four parts?
  10. 10.On most newer trucks and buses with air brakes, how do you set the parking brakes?

0 of 25 answered