What is the maximum psi for the governor cut-out on a dual air system bus?

The correct answer is 130 psi, which is the maximum pressure setting for the governor cut-out in a dual air system bus. The governor cut-out is a critical component in the air braking system, ensuring that the air pressure in the system does not exceed safe operating limits. This maximum psi is designed to provide adequate braking power while also protecting the air system from over-pressurization, which can lead to system failure or air leaks.

In a dual air system bus, maintaining a balance between front and rear air supply is essential for the safe operation of the vehicle. The pressure setting at 130 psi helps to ensure that there is enough air pressure for effective braking without risking the integrity of the system. This pressure is standardized to provide consistent performance across different vehicles and conditions, aligning with safety regulations and manufacturer guidelines.

The values below this maximum pressure are typically too low for optimal performance in braking. The system needs to maintain sufficient air pressure for the air brakes to operate effectively.