Georgia Commercial Driver License Practice Test

During a static leakage test, what is the maximum leakage rate for a double combination vehicle?

1. 2 psi in one minute

2. 3 psi in one minute

3. 4 psi in one minute

4. 5 psi in one minute

The correct answer is: 3 psi in one minute

The maximum leakage rate for a double combination vehicle during a static leakage test is 3 psi in one minute. This standard is set to ensure that the vehicle's air brakes are functioning reliably and efficiently. A leakage rate higher than this indicates potential issues with the air brake system, which can compromise vehicle safety. For commercial vehicles, maintaining an acceptable leakage rate is crucial, as excessive air loss can lead to brake failure or decreased performance in critical situations, increasing the risk of accidents. It's essential for drivers and maintenance personnel to be aware of these limits and to routinely test the braking systems to ensure compliance with safety regulations. A clear understanding of these figures helps ensure that a vehicle is roadworthy and minimizes the likelihood of air brake-related failures.