Air brakes written test (sgi) Questions and Answers 100% Pass

Air brakes written test (sgi) Questions and Answers 100% Pass Most break lines operate best around _________ and should not exceed _______ - 120°/ 250° When two surfaces are in contact with each other what does the friction do? - Resists movment If you double your speed your stopping distance will - Quadruple What is not a factor in determining stopping distance? - Engine speed The supply reservoir is also known as? - The wet reservoir If a safety valve blows off excess pressure, this indicates an issue with what? - The governor The purpose of brakes on a vehicle is to what? - Concert heat to motion (stop) To operate an air break equipped vehicle in Sk what must be present on your license ? - A At what system air pressure (maximum) must a governor stop a compressor pumping air - 145psi The function of the compressor is to - Build up and maintain air pressure Between the driver recognizing a hazard to apply the break peddle, how much time would have gone by? - .75 of a second When a governor has stopped a compressor pumping air, it should resume before the pressure drops below? - 100psi 2 | P a g e Author. Emily Charlene, ©2025 All Rights Reserved. When the foot operated valve is released what happens to the air in the service breaks? - It is released to the exhaust port How many principal components does a basic air break system have - 5 When air is supplied to the service brake chamber what does the push rod do? - Moves the slack adjuster The safety valve on a supply reservoir is usually presented at? - 150psi all reservoirs in an air break system must be drained at least - Daily what function does the one way check valve preform? - stops air bleeding from the service reservoir to the supply reservoir in a properly working air break system, from applying the pedal to the air working on the breaks approx. how much time will elapse - 0.4 of a second in the service brake chamber, what does the diaphragm do? - pushes and pulls the rod assembly forward breaks will start to be damaged when they reach the lining temp at - 300 decrees C on a dual circuit air break system, the breaks will be applied by? - a single pedal how does the spring break work? - applied by spring pressure, released by air pressure the control button for the trailer supply valve is usually? - a red octagon the tractor protection system is designed to do what ? - stop the tractor from losing air if one circuit on a dual circuit system fails the other will? - continue to work independently its important that the spring breaks are fully applied before? - the air supply is fully depleted 3 | P a g e Author. Emily Charlene, ©2025 All Rights Reserved. the spring breaks will begin to drag at around what psi? - 70 hint- once you are 70 you begin to drag and not celebrate spring break air dryer systems are useful in preventing what? - air line freeze ups a properly adjusted governor will cut in at what pressure below the cut out pressure - 20-25 psi a low-pressure warning switch must be activated when the air pressure drops below? - 60 psi the purpose of the dual circuit air system is to what? - to prevent total break failure if you vehicle has an air drying system the reservoir needs to be drained when