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CDL Air Brakes Endorsement Practice Test -3

Need to Pass your CDL Air Brake Test! Then start here with FREE Practice Tests for Commercial Drivers. Our practice tests are designed to help you learn the material in the CDL Handbook, Each question is multiple choice and will provide instant feedback.
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CDL Air Brakes Endorsement Practice Test

Pass your CDL air brakes endorsement test with flying colors! Our free online air brakes practice test combines proven study methods with an easy-to-study format to ensure your success without any stress. Quiz yourself using the most up-to-date information from FMCSA, including air pressure regulations, safe air tank operation, the individual braking systems in the vehicle, and more.

Our free air brakes endorsement practice test features multiple-choice questions that you can expect to see on your DMV endorsement exam—plus, you’ll get to practice the same testing format that your DMV uses as well. We give you feedback in real-time on any missed questions, with full explanations for each answer and a comprehensive review at the end to help you study smarter, not harder! Enjoy studying on your own schedule with a free online test that goes wherever you do.

CDL Air Brakes Endorsement Practice Test FAQs:

What is on the CDL air brakes endorsement test?

The air brakes endorsement test includes two parts: a written knowledge test and an in-vehicle practical exam. Your written test will ask questions on the laws and safety procedures associated with air brakes-equipped vehicles, and the practical exam will show your ability to put that knowledge into action.

What CDL class do I need to drive an air brakes vehicle?

The class of CDL you need is highly dependent upon the gross vehicle weight rating (GVRW) of the vehicle you’ll be driving. Many air brakes-equipped commercial vehicles are larger semi-trucks, which typically require a Class A CDL. However, you may instead drive a smaller box truck also equipped with air brakes, which often falls under a Class B CDL.

Is the air brakes endorsement required for all commercial drivers?

No, an air brakes endorsement is only required if you’re planning to drive vehicles equipped with air brakes.

[permit_quiz:state:entity:title] [permit_quiz:state:entity:field_agency_shortname] Sample Test Questions

A low air pressure warning signal is ________.
  • Completely unnecessary.
  • Optional on your vehicle.
  • Required on all vehicles with air brakes.
  • None of the listed answers.
A low pressure warning signal could be __________.
  • A red light.
  • A buzzer.
  • A wig wag mechanical arm.
  • All of the listed answers.
Air brakes take longer to stop than hydraulic brakes because _______.
  • The linings become heated too rapidly.
  • It takes longer for air to flow through the lines.
  • The drivers of air brakes have longer reaction times.
  • None of the listed answers.
An air compressor can be cooled by _______.
  • Air
  • Cooling engine system.
  • Oil
  • Water.
  • Air or an engine cooling system.
Automatic adjusters should ________.
  • Not have to be manually adjusted.
  • Only be adjusted manually during warm weather.
  • Not have to be adjusted manually except when you are performing maintenance on the brakes and during installation of the slack adjusters.
  • Only be adjusted manually during installation of the slack adjusters.