At what air pressure range should the air compressor work correctly?

The air compressor in a school bus should operate effectively within a range of 100 to 125 psi. This range is crucial because it allows for sufficient air pressure to function properly, ensuring that the bus's air brake system operates safely and reliably.

Operating outside of this recommended range can lead to issues; for instance, if the pressure is too low, it may not supply enough force for the brakes to engage adequately. Conversely, if the pressure is too high, it could cause the system to overheat or fail, potentially leading to brake failure or other safety hazards.

The specified range (100 to 125 psi) effectively balances performance and safety, which is essential for ensuring both the driver’s control of the bus and the safety of the passengers.