What happens when the air compressor reaches cut-out level?

Answer: A — The air stops pumping

When the air compressor reaches the cut-out level, it signifies that the air pressure within the system has reached the predetermined maximum limit set by the governor. At this point, the air compressor stops pumping air into the tanks to prevent over-pressurization, which could potentially lead to damage to the air brake system or the tanks themselves. The cut-out level is a critical component of the air brake system since it helps maintain the necessary pressure range for efficient brake operation while ensuring safety. If the compressor continued to run without stopping, it could exceed the safe operating pressure, which would not only pose risks of failure but may also trigger safety mechanisms designed to release excessive pressure. Understanding this function is important for drivers, as it ensures they are aware of how the air brake system operates and can recognize signs of malfunction if the pressure continuously remains below or above expected ranges.