CDL Air Brake Questions and Answers 100% Pass

CDL Air Brake Questions and Answers 100% Pass The air loss rate for a straight truck or bus with the engine off and the breakers applied should not be more than: D. 3 psi in one minute. Which of the following statements about brakes is true? A. The heavier a vehicle or faster it is moving, the more heat the brakes have to absorb to stop it. The purpose of the engine retarders is to: B. Help slow the vehicle while driving and reduce brake wear. If your vehicle has an alcohol evaporator, it is there to: D. Reduce the risk of ice in air brake valves in cold weather. The air supply pressure gauge shows the driver how much pressure: B. Is available in the air tanks. Which brake system applies and releases the brakes when the driver uses the brake pedal? B. This service break system When using the parking brakes, what type of pressure is being used? B. Spring pressure Three different systems are found our modern air brake systems, service breaks, the parking brakes, and the A. Emergency brakes Air loss in a single vehicle (not a combination until) should not be more than ______________ with the engine off and the brakes on. D. 3 psi in one minute The vehicle must have a warning device which comes on when air pressure in the service air tanks falls below C. 60 psi Air brake equipped vehicles must have: C. An air pressure gauge, to show the pressure available for braking. How do you check the free play manual slack adjusters? B. Park on level ground, chock wheels, release the parking brakes and pull slack adjusters. The most common type of foundation brake found on heavy commercial vehicles is: C. S- cam drum The air compressor governor controls: D. When the compressor will pump air into the storage tanks. The brake pedal: C. Controls the air pressure applied to operate the brakes. What will determine how effective the spring emergency brakes or the parking brakes work? C. Depends on the adjustment of the service brakes. When a failure occurs in the service brake system, the system you need to stop the vehicle is the: B. Emergency brake system If your vehicle is equipped with an alcohol evaporator, every day during winter weather you should: A. Check and fill the alcohol level. What turns on the electrical stop light switch in an air brake system? C. Air pressure