When performing an air brake check, why should you use wheel chocks?

Using wheel chocks during an air brake check is essential for securing the vehicle in place, particularly when it is parked on an incline. This safety measure ensures that the vehicle does not roll away while the air brake system is being tested. When performing maintenance or inspections, it's crucial to minimize the risk of accidents, and wheel chocks provide that additional layer of safety.

While preventing air loss from the brake system is important, wheel chocks do not serve this function. Their primary purpose is to stabilize the vehicle. Similarly, testing weight distribution and facilitating quick access to tools are not relevant uses of wheel chocks during an air brake check. Thus, the correct answer emphasizes the necessary action of securing the vehicle to promote safety during the inspection process.