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FREE 2024 Pennsylvania (PA) Air Brakes Exam Simulator 4

2024 PA Air Brakes Information

Most commercial vehicles utilize an air brake system over the traditional hydraulic brake system of passenger cars due to the "unlimited" supply the included air compressor and storage tanks can create. This eliminates the need to add hydraulic fluid when connecting a trailer.

The air brakes test covers the air brake system in detail, including appropriate air loss, brake lag, system components, and more. There are a total of 25 multiple choice questions on the air brakes exam, and you must score 80% (20 out of 25) to pass the exam. We have complied 100 questions you will find on the air brakes exam. These questions are based off the 2024 Pennsylvania CDL drivers’ manual.

The air brakes exam is different than the other endorsement tests, it actually serves as a restriction on your license. You are able to get a CDL without the air brakes test but will not be allowed to drive any vehicle that is equipped with air brakes because your license will have a "L" restriction.

Image of Pennsylvania's Driver's License

Based on the 2024 PA CDL Driver's Manual

PA Air Brakes Fact Sheet
Questions on Test:
25
Correct answers needed to pass:
20
Passing Score:
80%
Age to apply:
18
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Air loss in a straight truck or bus should not be more than _____ with the engine off and the brakes applied.
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  1. Air loss in a straight truck or bus should not be more than _____ with the engine off and the brakes applied.
  2. What activates the stop switch?
  3. A straight truck or bus air brake system should not leak at a rate of more than ____ psi per minute with the engine off and the brakes released.
  4. Vehicles with air brakes must have:
  5. Slack adjusters should not have any more than _____ of play?
  6. What is the best way to test your vehicle's low air pressure warning signal?
  7. Which vehicles must have low air pressure warning signals?
  8. On a long or steep downgrade, once you have reached your "safe" speed, brake until you are traveling
  9. To check the slack adjusters on S-cam drum brakes, you should first
  10. Before starting down a hill, you should be in the proper gear
  11. To apply the parking brakes under normal conditions,
  12. Slack adjusters are
  13. Which of the following is NOT part of the air brake system?
  14. Air braking takes more time than hydraulic braking because air brakes:
  15. In air brake vehicles, the parking brakes should be used:
  16. The brake pedal in an air brake system:
  17. Your vehicle has a dual air brake system, if a low air pressure warning comes on for the secondary system, you should?
  18. The tractor protection valve
  19. What is the first thing you should do if the low air pressure warning comes on?
  20. When should you use the parking brake?
  21. The supply pressure gauge shows the driver how much pressure:
  22. Which of the following is NOT part of the drum brake?
  23. The safety release valve will blow at _____ psi?
  24. In an emergency stop you should?
  25. What are spring brakes?
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