CDL AIR BRAKE ENDORSEMENT QUESTIONS

During normal driving spring breaks are usually held back by? - Answer- Air pressure When should the parking brake be applied? - Answer- Anytime the vehicle is parked Is it possible to have have an air leak in one system and the other will be unaffected? - Answer- yes Does the governor control when the air compressor will pump air into the storage tanks? - Answer- Yes The emergency braking system... - Answer- Uses parts of the service and parking brake system to stop the vehicle in the event of brake system failure. If your bus or truck has dual parking control valves, you can use pressure from a separate tank to... - Answer- release the spring emergency/ parking brakes to move a short distance. a slack adjuster's free play needs to be adjusted if it is more than 1 inch when you pull hard on it? - Answer- Yes The driver must be able to see a low pressure warning that comes on before pressure in the service air tank falls below what? - Answer- 60 PSI Front wheel brakes are good under all conditions. Tests have indicated that front wheel skids from braking are not likely, even on ice. - Answer- True What is the purpose of an alcohol evaporator? - Answer- to reduce the risk of ice in the brake valves and other parts in cold weather. The modulating control valves allows you to control the... - Answer- Spring brakes The S-cam forces the brake shoes away from one another and presser them against the inside of the brake drum. it is called the S-ca, because? - Answer- It is shaped like the letter S It is not safe to drive a vehicle that has brake drums with cracks that are linger than ____ of the width of the friction area? - Answer- 1/2