What is the maximum acceptable pressure drop for a static air brake test in one minute?

The maximum acceptable pressure drop for a static air brake test in one minute is 2 psi. This standard is in place to ensure that the air brake system is functioning properly and can maintain adequate pressure to operate effectively. When conducting a static air brake test, the vehicle's air pressure should be measured over a minute of inactivity.

A pressure drop greater than 2 psi within that timeframe might indicate a leak or malfunction in the braking system, compromising vehicle safety. Maintaining this standard helps ensure that the braking system is reliable, contributing to overall safe operation on the road. Understanding this limit is essential for engineers and technicians who are responsible for inspecting and maintaining air brake systems in vehicles.