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CDL Air Brakes Endorsement Exam Questions and Answers
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CDL Air Brakes Endorsement Exam Questions and Answers What does an air compressor do in an air brake system? - ANSWER-It pumps air into the air storage tanks. In an air brake system, the air compressor pumps air into the air storage tanks. The air compressor is controlled by the air compressor...

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  • November 3, 2024
  • 18
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • cdl air brakes endorsement exam questions and answ

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KaylinHoffman

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Copyright © KAYLIN 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED FIRST PUBLISH NOVEMBER, 2024




CDL Air Brakes Endorsement Exam

Questions and Answers


What does an air compressor do in an air brake system? - ANSWER✔✔-It pumps air into the air storage

tanks.




In an air brake system, the air compressor pumps air into the air storage tanks. The air


compressor is controlled by the air compressor governor.


The air storage tanks hold enough air for what? - ANSWER✔✔-Hold enough air for the brakes to be used

several times if the compressor stops working.




The air storage tanks in an air brake system store compressed air to be used for braking.


They hold enough air for the brakes to still be used several times if the compressor stops


working


To ensure normal stopping power, drivers of vehicles equipped with a front brake limiting valve


should: - ANSWER✔✔-Set the control to normal.




Copyright ©Stuvia International BV 2010-2024 Page 1/18

,Copyright © KAYLIN 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED FIRST PUBLISH NOVEMBER, 2024




Some older vehicles have front brake limiting valves with "normal" and "slippery" settings.


Setting a brake limiting valve to "slippery" reduces the vehicle's stopping power, so a driver


should make sure the valve is in its "normal" position. Front wheel braking has proven to be


effective in all driving conditions.


If the spring brakes are on, you should: - ANSWER✔✔-Not use the brake pedal.




Do not use the brake pedal when the spring brakes are on. This could damage the brakes by


subjecting them to the combined forces of springs and air pressure.


Vehicles equipped with Anti-Lock Braking Systems (ABS) have ____ malfunction lamps to


indicate when the ABS is not working. - ANSWER✔✔-Yellow




Vehicles with ABS have yellow malfunction lamps to alert drivers when the braking systems


are not working. Be sure you know where the malfunction lamp on your vehicle is before


beginning a trip.


A dual air brake system: - ANSWER✔✔-Consists of two separate air brake systems that share a single set

of controls.

Copyright ©Stuvia International BV 2010-2024 Page 2/18

, Copyright © KAYLIN 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED FIRST PUBLISH NOVEMBER, 2024




A dual air brake system is made up of two separate air brake systems. The systems share a


single set of brake controls, but each has its own air tanks, hoses, and lines. One system


typically operates the regular brakes on the rear axle or axles while the other system


operates the regular brakes on the front axle.


If an air compressor is belt-driven, the belt should be routinely checked to ensure that it is: -

ANSWER✔✔-Properly tightened.




If your vehicle has air brakes, the air compressor drive belt should be checked before each


drive. Check the tightness of the belt and verify that it is in good condition.


Having ABS on only one axle still allows you to... - ANSWER✔✔-Still allows you additional control when

braking.




If you have an Anti-Lock Braking System (ABS) equipped on only the tractor, only the trailer,


or only one axle, you will still have more control over the vehicle when braking than you


would without ABS. You should brake normally.


The air compressor is connected to the: - ANSWER✔✔-Engine.




Copyright ©Stuvia International BV 2010-2024 Page 3/18

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