What is the correct process for the service brake check?

The procedure for conducting a service brake check is crucial for ensuring the vehicle is safe for operation. When you release the parking brake and drive forward, then apply the service brake, you are effectively testing the braking system under real driving conditions. This allows you to assess its functionality and responsiveness. By moving forward, you can evaluate how the service brakes engage and decelerate the vehicle, providing a practical assessment of their performance.

Maintaining control of the vehicle during this test is essential; therefore, moving forward at a safe speed allows for an accurate evaluation while minimizing risks. It helps the driver feel how promptly and effectively the brakes respond. This approach aligns with standard safety protocols for vehicle inspections, ensuring that the brakes can perform adequately in a real-world scenario.

Other processes, such as keeping both hands on the steering wheel while driving forward or accelerating quickly to test the brakes, do not effectively test the brakes' functionality and can potentially compromise safety. Similarly, applying the brake while reversing does not provide the proper assessment needed for service brake performance as it does not allow a full evaluation under normal driving conditions. Thus, option B reflects the correct and safest method for checking the service brake.