Which method can be used to test service brake performance?

The drive and stop test is a practical method for testing service brake performance. This method involves driving the vehicle at a safe speed and then applying the brakes to determine how effectively and quickly the vehicle comes to a stop. This test allows the inspector to assess several key elements of brake performance, including brake engagement, stopping distance, and responsiveness.

During this test, the driver can evaluate if the brakes are functioning uniformly and whether there are any unusual noises or sensations, such as pulling to one side, that could indicate problems. It provides real-world feedback about the brakes under actual driving conditions, making it a comprehensive approach to identifying brake issues that may not be evident through visual inspection or static tests.

In contrast, visual inspection is limited to assessing the condition of brake components without evaluating their functional performance. Pressure testing can provide some information about hydraulic systems, but it does not mimic actual driving conditions. Using the vehicle’s speedometer does not directly test brake performance, as it merely indicates speed rather than how well the brakes operate under that speed. Thus, for a thorough evaluation of service brake performance, the drive and stop test is the most effective method.