Texas CDL Air Brakes Section 5 Questions and Answers 100% Pass

Texas CDL Air Brakes Section 5 Questions and Answers 100% Pass You should know that your brakes are fading when? You have to push harder on the brake pedal to control you down hill speed If the spring brakes are on when should you push the brake pedal? Never Repeatedly pressing and releasing (fanning) the brake pedal may result in ? A loss of air pressure The driver must be able to see a low air pressure warning which comes on before pressure in the service air tank falls below_____PSI? 60psi If your truck or bus has dual parking control valves you can use pressure from a separate tank. to release the emergency/spring/parking brakes to move a short distance. The brake pedal in a air brake system. controls the air pressure applied to put on the brakes To check the free play of manual slack adjusters of s-cam brakes you should? park on level ground, chock the wheels release the parking brakes and pull on the slack adjusters Parking or emergency brakes on trucks or buses can be legally held on by _______ pressure. Spring Emergency stab braking is when you brake and hard as you can, then release the brakes when the wheels lock up and put on the brakes again when the wheels start rolling The most common type of foundation brake found on heavy vehicles is the S-Cam If your truck has dual air brake system and one of the systems is low on pressure either the front or rear brakes will not be fully functional The most important thing to do when a low pressure warning light comes on is to stop and safely park as soon as possible With air brake equipped vehicles, the parking brakes should be used any time the vehicle is parked The air compressor Governor controls when air is pumped into the tanks The stop light switch turns on the brake light to warn other drivers behind you For air brake systems in good condition the air compress compressor should start pumping at about _______ psi 100psi The air loss rate for a straight truck or bus with the engine off and the parking brakes off and the service brakes on should not be more than 3 psi in one minute The braking power of the spring brakes depends on the service brakes being in adjustment How should you check spring brakes application when air pressure drops below a certain level park on level ground, chock wheels, release parking brake when you have enough pressure shut the engine off and repeatedly press and release the pedal If you are driving down a steep grade and have reached a safe speed of 40 mph you would apply the service brakes until your sped drops to ______ mph 35mph Air brake lag distance at 55 mph adds about _______ feet to your stopping distance 32 feet How should you check that your service brakes are working properly Park on level ground wait for normal air pressure release the parking brake move forward slowly and apply the brakes firmly using the brake pedal Emergency controlled braking is when you