Cdl air brakes Questions And Answers

the brake drums or disc - Answer- must not have any cracks longer than half the width of the friction area a straight truck or bus air brake system should not leak at a rate of more than _ psi per minute with the engine off and the brakes released - Answer- 2 to check the air compressor governor "cut in" and "cut out" pressures: - Answer- -run the engine at a fast idle -step on and off the brake to reduce tank pressure -monitor the air pressure gauge the air compressor governor controls: - Answer- when the air compressor pumps air into the storage tanks the governor allows the air to start pumping again when it reaches the cut in level, or around: - Answer- 100 psi modern air brake systems combines three different systems. they are the service brakes, the parking brakes and the: - Answer- emergency brakes when you apply pressure to the brake pedal, you are: - Answer- pushing against a spring and against air pressure to the brakes what can legally hold a parking or emergency brake in position for a truck, truck tractor, or bus? - Answer- spring pressure you should know that your brakes are fading when: - Answer- you have to push harder on the brake pedal to control your speed on a downgrade. if your air compressor stops working: - Answer- you'll still have air pressure left in the air tanks. stab braking occurs when you - Answer- -press on the brake pedal as hard as you can -release brakes when the wheels lock up -apply brakes when wheels start rolling the braking power of the spring brakes - Answer- depends on the adjustment of the service brakes of the choices below, the first thing to do when a low air pressure air warning comes on is - Answer- stop and safety park as soon as possible