Georgia Commercial Driver License Practice Test

What is the maximum allowable air pressure drop in a fully charged air brake system after one minute?

1. 1 psi

2. 2 psi

3. 3 psi

4. 5 psi

The correct answer is: 2 psi

In a fully charged air brake system, the maximum allowable air pressure drop after one minute is indeed 2 psi. This standard is important because it ensures that the air brake system maintains adequate pressure for safe operation. If the pressure drop exceeds this limit, it could indicate a leak or other issue within the system, which could compromise braking efficiency and safety. Maintaining a 2 psi maximum drop in that timeframe demonstrates that the air brake system is functioning properly and has no major leaks that would affect its performance. This requirement is crucial for the safety of both the driver and others on the road, as air brakes rely on maintaining consistent pressure to function effectively. Regularly checking this pressure drop helps drivers identify potential problems before they become serious.