CDL Air Brakes |Complete Questions with Graded A+ Answers

CDL Air Brakes |Complete Questions with Graded A+ Answers Air loss in a straight truck or bus should not be more than how much PSI with the engine off and the brakes on? 3 PSI in one minute To make an emergency stop with air brakes, using the stab braking method, you should Brake as hard as you can get off brakes when wheels lock get back on brakes when wheels start rolling again All vehicles with air brakes must have what signal? Low air pressure warning signal It is accepted that too much heat caused by using your brakes too often can also cause what? brake to fade or fail When is it ok to leave your truck unattended without applying the parking brakes and choking the wheels? Never You should know that your brakes are fading when you have to do what? push harder on the brake pedal to control your speed on a downgrade The safety valve discharges automatically at what pressure? 150 What is a dual airbrake system? 2 brake system one operates front brakes one operates back brakes If air pressure is not built up within the correct amount of time, then what will happen? air pressure may drop to a low point while driving, requiring an emergency stop How often should you drain air tanks? Daily A slack adjusters free play needs to be adjusted if it is more than about how many inches when you pull hard on it? 1 inch In ideal conditions, a truck or bus with an air brake going at 55 mph would require a stopping distance of how many feet? more than 300 feet If air pressure is not built up within the correct amount of time, then what will happen to the air pressure? drop to a low point while driving requiring an emergency stop It is accepted that too much heat caused by using your brakes too often can also cause what? Brake to fade or fail What does the governor control? when air compressor will pump into air storage tanks To make an emergency stop with air brakes, using the stab braking method, you should do what? Brake as hard as you can get off brakes when wheels lock get back on brakes when wheels start rolling The driver must be able to see a low air pressure warning which comes on before pressure in the service air tanks falls below what PSI? 60 The use of brakes on a long steep downgrade is only a supplement to the braking effect of the engine True The spring brakes used on the chambers in a straight truck will bring you to a stop when air pressure drops below what PSI? 60 What do air brakes use to make the brakes work? Compressed Air What can legally hold a parking or emergency brake in position for a truck, truck tractor, or bus? Spring Pressure When you put on the brakes by pushing down the brake pedal, what happens? Air pressure is applied to the brake pads