Why must air tanks be drained? - ---Answers----Water and compressor oil can get inside of the tank and can freeze in cold weather and cause brake failure.
What is a supply pressure gauge used for? - ---Answers----It tells you how much pressure is in the air tanks
All vehicles with air brakes must have a low air pressure warning signal - ---Answers----True
What are spring brakes? - ---Answers----When the air pressure is removed the springs put on the brakes. A parking brake control in the cab allows the driver to let the air out of the brakes.
When the air pressure is removed the springs put on the brakes. A parking brake control in the cab allows the driver to let the air out of the brakes. - ---Answers----True