What is the main function of the air compressor in an air brake system?

The primary function of the air compressor in an air brake system is to compress air and deliver it to storage tanks. This is essential for the operation of the air brake system, as it creates the necessary air pressure needed to apply the brakes effectively. When the driver engages the brake pedal, the compressed air stored in the tanks is released into the brake chambers, leading to the application of the brakes.

Without the air compressor functioning properly, there would be insufficient air pressure to operate the brakes, which could lead to brake failure. The ability of the air compressor to maintain a constant and adequate supply of compressed air ensures the reliability and safety of the braking system.

While the other options involve important aspects of the braking system, they do not accurately describe the specific role of the air compressor. For instance, converting mechanical force to braking force involves the components that actuate the brakes rather than the compressor itself. Regulating air pressure and indicating air pressure levels are functions managed by different parts of the braking system, such as regulators and gauges. Therefore, the compressor's crucial task of compressing and delivering air is fundamental to the air brake system's overall operation.