When inspecting air brakes, what is the minimum air pressure that should be present?

The minimum air pressure of 100 psi is critical for ensuring the proper functioning of air brake systems. Having at least this level of pressure ensures that the brake components operate effectively and can maintain the necessary clamping force to stop the vehicle safely.

When brakes are engaged, air pressure is used to activate a diaphragm or piston that applies force to the brake shoes or pads. If the pressure falls below 100 psi, the brakes may not receive adequate force, leading to delays in stopping or complete brake failure. This pressure threshold also aligns with industry safety standards, ensuring vehicles meet the required safety measures for operation.

In summary, maintaining a minimum air pressure of 100 psi is essential for the reliability and safety of air brake systems in commercial vehicles.