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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 To test air service brakes you should: - ANSWER-Brake firmly while slowly moving forward The driver must be able to see a low air pressure warning which comes on before pressure in the service air tanks falls below ____ psi - ANSWER-60 If you...

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  • November 3, 2024
  • 8
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • cdl air brakes test questions and answers 100 pas

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  • Cdl
  • Cdl

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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 Test Questions and

Answers 100% Pass


To test air service brakes you should: - ANSWER✔✔-Brake firmly while slowly moving forward


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

air tanks falls below ____ psi - ANSWER✔✔-60


If your vehicle has an alcohol evaporator, every day during cold weather you should: - ANSWER✔✔-

Check and fill the alcohol level


All air brakes equipped vehicles have: - ANSWER✔✔-A supply pressure gauge


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


Modern air brakes combine three different systems. They are the service, the parking, and the ___

brakes. - ANSWER✔✔-Emergency


To check the free play of manual slack adjusters of s-cam brakes, you should park on: - ANSWER✔✔-

Level ground, chock the wheels and release parking breaks


Why should you drain water from compressed air tanks? - ANSWER✔✔-Water can freeze in cold weather

and cause brake failure


The spring brakes used on the chambers in a straight truck will bring you to a stop when air pressure

drops below____ psi - ANSWER✔✔-20




Copyright ©Stuvia International BV 2010-2024 Page 1/8

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


With air brake vehicles, the parking brake should be used: - ANSWER✔✔-Whenever you leave the

vehicle unattended


The safety valve is set automatically when pressure is - ANSWER✔✔-150


Repeatedly partially increasing and pressing the brake pedal may result in: - ANSWER✔✔-A loss of air

brake pressure


If your truck has dual air brake system, and one of the systems loses its pressure, what will happen? -

ANSWER✔✔-Either the front or rear brakes will not be fully functional


If you must make an emergency stop, you should brake so you: - ANSWER✔✔-Can steer and so your

vehicle stays in a straight line


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

than: - ANSWER✔✔-3 psi in one minute


You brakes are fading when: - ANSWER✔✔-You have to push harder on a brake pedal to control your

speed on a downgrade


Which one of these is NOT a proper time to apply the parking brakes? - ANSWER✔✔-If the brakes are

very hot


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

adjustment


Your truck or bus has a dual air brake system. If a low pressure warning comes on for only one system,

what should you do? - ANSWER✔✔-Bring your vehicle to a complete stop right away and safely park.

Continue only after the system is fixed



Copyright ©Stuvia International BV 2010-2024 Page 2/8

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