What is the function of the governor in an air brake system?

Answer: B — To control the build-up and release of air pressure

The function of the governor in an air brake system is to control the build-up and release of air pressure. It is a critical component that ensures the air brake system operates effectively. The governor monitors the pressure in the air tanks and activates or deactivates the compressor as needed, maintaining the appropriate air pressure for the system to function properly. This control helps prevent over-pressurization, which can lead to system failure, and ensures that the system has enough pressure to apply the brakes effectively when needed. By regulating air pressure, the governor plays an essential role in the overall performance and safety of the braking system, ensuring that the vehicle can stop efficiently in various driving conditions.