Arizona Air Brakes CDL Practice Test

The air compressor governor is a critical component of the air brake system, responsible for regulating the air pressure supplied to the braking system. It achieves this by controlling the flow of air into the storage tanks. When the air pressure in the tanks falls below a predetermined level, the governor activates the compressor to fill the tanks. Conversely, when the pressure reaches the desired level, the governor prevents the compressor from sending more air, thus maintaining a consistent and adequate pressure for effective braking performance. This regulation is essential for the safe operation of air brakes because it ensures that the braking system has the necessary air pressure available to function properly, assisting in stopping the vehicle. Proper regulation also prevents over-pressurization, which could damage components or lead to brake system failure. Other options, while relevant to understanding vehicle systems, do not accurately describe the specific function of the air compressor governor in managing air supply to the braking system.