CDL Air Brakes Test Exam With 100% Correct Answers 2024

CDL Air Brakes Test Exam With 100% Correct Answers 2024 To test air service brakes you should: - answerBrake 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 - answer60 If your vehicle has an alcohol evaporator, every day during cold weather you should: - answerCheck and fill the alcohol level All air brakes equipped vehicles have: - answerA supply pressure gauge The most common type of foundation brake found on heavy vehicles is the: - answerS-cam drum Modern air brakes combine three different systems. They are the service, the parking, and the ___ brakes. - answerEmergency To check the free play of manual slack adjusters of s-cam brakes, you should park on: - answerLevel ground, chock the wheels and release parking breaks Why should you drain water from compressed air tanks? - answerWater 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 - answer20 With air brake vehicles, the parking brake should be used: - answerWhenever you leave the vehicle unattended The safety valve is set automatically when pressure is - answer150 Repeatedly partially increasing and pressing the brake pedal may result in: - answerA loss of air brake pressure If your truck has dual air brake system, and one of the systems loses its pressure, what will happen? - answerEither the front or rear brakes will not be fully functional If you must make an emergency stop, you should brake so you: - answerCan 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: - answer3 psi in one minute You brakes are fading when: - answerYou 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? - answerIf the brakes are very hot The braking power of the spring brakes: - answerDepends 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? - answerBring your vehicle to a complete stop right away and safely park. Continue only after the system is