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CDL AIR BRAKES TEST QUESTIONS AND ANSWERS 100% PASS

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CDL AIR BRAKES TEST QUESTIONS AND ANSWERS 100% PASS In air brake vehicles, the parking brake should be used: - ANSWER-any time the vehicle is parked Repeatedly pressing and releasing (fanning) the brake pedal may result in: - ANSWER-the loss of brake pressure If the spring brakes are on, when ...

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  • November 3, 2024
  • 5
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • Cdl
  • Cdl
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KaylinHoffman
Copyright © KAYLIN 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED FIRST PUBLISH NOVEMBER, 2024




CDL AIR BRAKES TEST QUESTIONS AND

ANSWERS 100% PASS


In air brake vehicles, the parking brake should be used: - ANSWER✔✔-any time the vehicle is parked


Repeatedly pressing and releasing (fanning) the brake pedal may result in: - ANSWER✔✔-the loss of

brake pressure


If the spring brakes are on, when should you push the brake pedal? - ANSWER✔✔-never


How should you check that the trailer brakes come on when air pressure in the system drops below a

certain level? - ANSWER✔✔-chock the wheels, apply the parking brake, shut the engine off and pump

the brake pedal to reduce air tank pressure


The most common type of foundation brake found on heavy vehicles is the: - ANSWER✔✔-s-cam drum


You should know your brakes are fading when: - ANSWER✔✔-you have to push the brake pedal harder

to control speed on a downgrade


The air loss rate for a straight truck or bus with the engine off and the brakes on should not be more

than: - ANSWER✔✔-3psi in one minute


The brake pedal in an air brake system: - ANSWER✔✔-controls the air pressure applied to put on the

brakes


Truck and bus parking or emergency brakes must be held on by: - ANSWER✔✔-air pressure




Copyright ©Stuvia International BV 2010-2024 Page 1/5

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


The air brake lag distance at 55mph on dry pavement adds about __ feet to your stopping distance: -

ANSWER✔✔-32


What is emergency controlled braking? - ANSWER✔✔-you apply the brakes as hard as you can without

locking the wheel


The driver must be able to see a low air pressure warning which comes on before pressure in the service

air tank falls below __ psi. - ANSWER✔✔-60


For air brake systems in good condition,the air compressor should start pumping at about ___ psi. -

ANSWER✔✔-100


If your truck has a dual air brake system and one of the systems is low on pressure: - ANSWER✔✔-either

the front or rear brakes will not be fully operational


The air compressor governor controls: - ANSWER✔✔-when air is pumped into the tanks


If your truck or bus has dual parking control valves, you can use pressure from a separate tank to: -

ANSWER✔✔-release spring emergency/parking brakes to move a short distance


If your truck's air compressor has its own oil supply, when should you first check your level? -

ANSWER✔✔-before driving


The stop light switch: - ANSWER✔✔-turns on the brake


You are on a steep downgrade and have reached your safe speed 40 mph. You would apply the service

brakes until your speed to __mph. - ANSWER✔✔-35


The braking power of the spring brakes: - ANSWER✔✔-depends on the service brakes being in

adjustment


Copyright ©Stuvia International BV 2010-2024 Page 2/5

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