What is the appropriate pressure range for conducting the LAB "leaks" test?

The appropriate pressure range for conducting the LAB "leaks" test being 90-120 psi is significant because this range ensures that the test accurately assesses the integrity of the air brake system without causing undue stress or potential damage to the components being tested.

In this context, maintaining a pressure within this specific range helps to simulate real operating conditions while still being high enough to detect any potential leaks. It allows for effective monitoring of the system's performance and safety, as leaks at lower pressures may not be easily identifiable.

Understanding the pressure requirements is crucial for school bus drivers and maintenance personnel, as it directly impacts the safety and functionality of the air brake systems in the buses, ultimately ensuring the safety of the children transported.