Final answer:
The air compressor governor controls when the air compressor will pump air into the brake system, which is true. It maintains the air pressure within a specific range for the brakes to function correctly. Proper maintenance, like bleeding air from the brake lines, is necessary for efficient operation.
Step-by-step explanation:
The air compressor governor plays a critical role in the functionality of a vehicle's air brake system. The answer to the student's question is that the statement is true. The governor controls when the air compressor will pump air into the brake system. It maintains the air pressure within a preset operating range. When the air tank pressure reaches the 'cut-out' level, the governor directs the compressor to stop pumping air. Conversely, when the pressure drops to the 'cut-in' pressure, the governor will trigger the compressor to pump air again. This process ensures that the brakes have sufficient air pressure to operate effectively.
However, because gases are compressible, when force is applied, the gas within the system would first compress and warm before generating the necessary force to engage the brakes. Therefore, it's essential to bleed out any air from the brake lines to ensure the brakes operate efficiently and respond correctly to the driver's input.