CDL Air Brakes Practice Test #2

Welcome future truck drivers! The following is the CDL Air Brakes Practice Test #2. 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 #2 Start Now 1. The Air Compressor Governor controls... A When the brakes should be applied B When the air compressor pumps air into the storage tanks C When the warning light is activated D When the air is released from the tank 2. A duel air brake system... A Has two air brake systems and one set of controls B Takes less time to build air pressure C Has one set of air tanks and hoses D Must have two warning alarms 3. An emergency brake... A Is required on commercial vehicles B Must be held on by mechanical force C Could be activated by the loss of air pressure D All of the above 4. To check the slack adjusters on S Cam brakes, you should... A Leave the parking brakes on and pull on the slack adjuster B Wear gloves and pull hard on each slack adjuster C Make sure the slack adjusters move more than one inch each way D Drain the air from the system and pull on the slack adjusters 5. To test the low pressure warning signal, you should do all BUT the following... A Shut the engine off B Turn the electrical power on C Ask a friend to listen for the signal D Step on and off the brake pedal to reduce air pressure 6. With dual air systems, the air pressure should build... A From 85 to 100 psi in 45 seconds B From 70 to 100 psi in 60 seconds C From 85 to 150 psi in 45 seconds D From 70 to 150 psi in 60 seconds 7. A fully charged air system typically has ____ psi. A 100 B 125 C 150 D 175 8. To test the air leakage rate you should... A Leave the engine running and release the service brake B Turn off the engine and release the service brake C Charge the air system and leave the engine running D Depress the brake pedal and monitor the air pressure gauge 9. A combination vehicle air brake system should not lose air faster than... A 2 psi per minute B 3 psi per 30 seconds C 3 psi per minute D 4 psi per minute 10. To check the air compressor governor "cut in" and "cut out" pressures... A Run the engine at a fast idle B Step on and off the brake to reduce tank pressure C Monitor the air pressure gauge D All of the above 11. To test your service brakes you should... A Stop the vehicle and put the parking brake on B Release the parking brake, move forward slowly and depress brakes C Put parking brake on and release air pressure D Depress brakes when traveling at highway speeds 12. Stab braking occurs when you... A Press on the brake pedal as hard as you can B Release the brakes when the wheels lock up C Apply the brakes when the wheels start rolling D All of the above 13. Air brakes take longer to stop than hydraulic brakes because... A The reaction time is longer for the driver B It takes longer for the air to flow through the lines C The linings get hotter more quickly D None of the above 14. The proper way to go down long grades is to... A Use a low gear and push hard on the brakes B Let up on the brakes from time to time to cool them C Use a low gear and apply light pressure on the brakes D Brake on and off down the hill 15. You should avoid using the parking brake... A on steep hills B if the air pressure is low C when the brakes are hot D any time you park 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 CDL Air Brakes Practice Test #1 You are now taking 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. 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