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| Question | Answer |
|---|---|
| Air breaking takes more time than Hydraulic Breaking because? | |
| A slack adjusters FreePlay needs to be adjusted if it is more than about _____ when you pull hard on it? | 1 inch |
| With Air brake vehicles, the parking brakes should be used? | Any time when vehicle is parked |
| Why should you drain water from compressed Air Tanks? | water can freeze in the cold weather and cause brake failure |
| The application pressure gauge shows how much Air pressure you? | Are applying to the Brakes |
| The Spring brakes used on the chambers in a straight truck will bring you to a stop when air pressure drop blowâââ psi | 20 |
| Some air brake systems have an alcoholic evaporator. What may happen if you donât keep the proper level of alcohol ? | Ice may form in the air, brakes valves, and cause brake failure |
| your truck has a dog air system, and one of the system lose its pressure what will happen? | either the front or back brake will not be fully OPERATIONAL |
| parking or emergency brakes of trucks and buses can be legally held on byâââ pressure? | Spring pressure |
| if your truck or bus has dual parking control valves, you can use pressure from a separate tank to? | release the spring emergency parking brakes to move a short distance |
| if your truck has a properly functioning though every system and minimum size air tanks the air pressure should build up from 85 to 100 psi within how many seconds? | 45 seconds |
| how should you check that your service brakes are working properly? | Park on level Ground waiting until a normal air pressure is reached at it. Release the parking brakes and move forward slowly at about 5 MPH. Didnât apply the brakes firmly |
| A straight truck or a bus air brake system should not leak at the rate of more than âââ psi per minute with the engine off, and the brakes released? | 2 PSI per minute |
| during normal driving spring breaks are usually held back by? | Air pressure |
| The air compressor stops pumping air at what psi? | 125 psi |
| The driver must be able to see a low air pressure warning, which comes on before pressure in the surface. Air tanks fails belowââ-psi? | 60 psi |
| Excessive use of the service brakes results in overheating, which can lead to? | Expansion of the brake drums |
| The most common type of fun foundation brake found on heavy vehicles is the? | S Cam drum |
| if you make an emergency stop, you should break so you? | canât keep your vehicle in a straight line |
| your truck or bus has a dual air brake system if a low pressure warning comes on for only one system. What should you do? | stop right away and safely park. Continue only after the system is fixed. |
| why drain water from compressed air tanks? | water can freeze in cold weather and cause brake failure |
| The safety valve is set automatically when pressure is | 150 |
| The air loss rate for a straight truck or a bus with the engine off and the brakes on should not be more than? | three psi in one minute |
| The driver must be able to see a low pressure warning, which comes on before pressure in the service air takes fails below ââ-psi | 60 psi |
Created by:
DESTINY27
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