What is the typical pressure range for air brake systems in heavy vehicles?

Answer: B — 100 to 120 PSI

The typical pressure range for air brake systems in heavy vehicles is indeed between 100 to 120 PSI. This range is crucial as it ensures the proper functioning of the braking system, allowing for adequate force to be applied to stop the vehicle effectively and safely. Ample pressure is necessary to ensure that the brake chambers receive enough air to activate the braking mechanism quickly and reliably. Maintaining this pressure level is significant for the performance of air brakes, which rely on compressed air to function. If the pressure falls below this range, the brakes may not respond appropriately, leading to safety hazards. Conversely, excessive pressure can lead to mechanical failure or increased wear on the brake components. Therefore, the 100 to 120 PSI range is considered the standard operating pressure that balances reliability, safety, and efficiency in heavy vehicles.