CDL Air Brakes Endorsement 100% VERIFIED SOLUTIONS

CDL Air Brakes Endorsement 100% VERIFIED SOLUTIONS To check the slack adjusters on S cam brakes, you should: - ANSWERWear gloves and pull hard on each slack adjuster. To test the low pressure warning signal, you should (3): - ANSWER* Shut the engine off * Turn the electrical power on * Step on and off the brake pedal to reduce air pressure. With dual air systems, the air pressure should build: - ANSWERFrom 85 to 100 psi in 45 seconds. With single air systems, the air pressure should build: - ANSWERFrom 50 to 90 psi in 3 minutes. To test air leakage rate you should: - ANSWERTurn off the engine and release the service brake. To check the air compressor governor "cut in" and "cut out" pressures (3): - ANSWER* Run the engine at a fast idle * Pump the brake to reduce tank pressure * Monitor the air pressure gauge The governor allows the air to start pumping again when it reaches the cut in level or around: - ANSWER100 psi The governor stops pumping air when it reaches the "cut out" level, or around: - ANSWER125 psi You should use the parking brake: - ANSWERAny time you park. To test your service brakes you should: - ANSWERRelease the parking brake, move forward slowly and press the brake pedal. A combination vehicle air brake system should not lose air faster than: - ANSWER3 psi per minute The safety valve in the air compressor tank is set to open at: - ANSWER150 psi When the safety valve releases air it means that (3): - ANSWER* The pressure has exceeded 150 psi * Too much air is in the air compressor * Something is wrong and you should have it checked by a mechanic When the low pressure warning is activated, you should: - ANSWERBring the vehicle to a safe stop while you still have braking control. Stab braking occurs when you (3): - ANSWER* Press on the brake pedal as hard as you can * Release the brakes when the wheels lock up * Apply the brakes when the wheels start rolling A fully charged air system typically has how many psi? - ANSWER125 ps