CDL Air Brakes Practice Test #1

Welcome future truck drivers! The following is the CDL Air Brakes Practice Test #1. If you're going to drive a commercial vehicle with air brakes, you'll need an Air Brakes Endorsement on your CDL (Commercial Driver's License). Simply click in your answer (A,B,C, or D) to each CDL practice test question. When you're done, check your score and the results. You can reset the test and retake it as many times as you want.

CDL Air Brakes Practice Test #1 Start Now 1. Brake drums... A Are bolted to the wheels B Are located at each end of the vehicle's axles C Hold the brake shoes and linings D All of the above 2. When the low pressure warning is activated, you should... A Wait for the air brakes to come on automatically B Bring the vehicle to a safe stop while you still control the brakes C Monitor your air pressure gauge and maintain highway speeds D Pump the brake pedal hard to stop 3. When the safety valve releases air it means that... A The pressure has exceeded 150 psi B Too much air is in the air compressor C Something is wrong, and you should have it checked by a mechanic D All of the above 4. In a single vehicle with a fully charged air system, air pressure loss (after an initial drop) should be less than... A 2 psi per minute B 3 psi per minute C 4 psi per minute D none of the above 5. The service brake system... A is an official vehicle inspection B applies and releases the brakes by using the brake pedal under normal driving C are the valves that keeps the air tank pressure serviced D is only on vehicles with hydraulic brakes 6. Your vehicle's single brake system needs adjustment if... A pressure builds from 50 to 75 psi within three minutes B pressure builds from 85 to 100 psi within 45 seconds C the compressor cuts out between 70 to 90 psi D the governor stops between 75 to 90 psi 7. Some air brake systems have an alcohol evaporator which helps... A Reduce the risk of ice in the air brake valves during cold weather B Remove oil from the air lines C Reduce the risk of water in the air brake valves in warm weather D Remove fuel from the air lines 8. Air tanks should be drained... A Once a week B Once a day C Every four hours D Every two or three days 9. The safety valve in the air compressor tank is set to open at... A 150 psi B 200 psi C 100 psi D 175 psi 10. Compressed air is stored... A In the hoses B In the engine compartment C In the fuel tank D In the storage tank 11. When you apply pressure to the brake pedal, you are... A Pushing against a spring and against air pressure to the brakes B Releasing air pressure to the brakes C Reducing air in the tanks D Activating the safety valve 12. The air compressor is connected to the engine through... A Gears B Hoses C V Belt D Both A and B 13. Which type of brake is the most common in commercial vehicles? A Wedge brakes B Disk brakes C S Cam brakes D Drum brakes 14. An air pressure gauge... A Shows how much pressure you are applying to the brakes B Is connected to the generator C Releases air when you accelerate D Prevents brake failure 15. All vehicles with air brakes are required to have a low pressure warning signal. This could be... A A red light B A wig wag mechanical arm C A buzzer D Any one of the above Test Score = Correct Answers: Get My CDL! The New Trucker Career Center CDL Practice Tests Access Page Trucker Country Home Page Click Here to Take the Next Test! Or choose from these additional CDL Practice Tests! CDL General Knowledge Practice Test #1 CDL General Knowledge Practice Test #2 CDL General Knowledge Practice Test #3 CDL General Knowledge Practice Test #4 CDL General Knowledge Practice Test #5 CDL General Knowledge Practice Test #6 CDL General Knowledge Practice Test #7 CDL General Knowledge Practice Test #8 CDL General Knowledge Practice Test #9 CDL General Knowledge Practice Test #10 CDL Hazardous Materials Practice Test #1 CDL Hazardous Materials Practice Test #2 CDL Hazardous Materials Practice Test #3 CDL Hazardous Materials Practice Test #4 CDL Hazardous Materials Practice Test #5 CDL Hazardous Materials Practice Test #6 CDL Hazardous Materials Practice Test #7 You are now taking Test#1 CDL Air Brakes Practice Test #2 CDL Air Brakes Practice Test #3 CDL Air Brakes Practice Test #4 CDL Air Brakes Practice Test #5 CDL Doubles and Triples Practice Test #1 CDL Doubles and Triples Practice Test #2 CDL Doubles and Triples Practice Test #3 CDL Doubles and Triples Practice Test #4 CDL Doubles and Triples Practice Test #5 CDL Combination Vehicles Practice Test #1 CDL Combination Vehicles Practice Test #2 CDL Combination Vehicles Practice Test #3 CDL Combination Vehicles Practice Test #4 CDL Tank Vehicles Practice Test #1 CDL Tank Vehicles Practice Test #2 CDL Tank Vehicles Practice Test #3 CDL Tank Vehicles Practice Test #4 CDL Tank Vehicles Practice Test #5 Accepting students from throughout the United States, Roadmaster Drivers School offers Truck Driver Training in the following locations: W. Memphis, AR Fontana, CA Tampa, FL Jacksonville, FL Orlando, FL Dunn, NC Columbus, OH Chattanooga, TN San Antonio, TX Salt Lake City, UT Go to top of page