What is the first step of a pre-trip inspection?

The first step of a pre-trip inspection is to chock the wheels. This action is crucial for safety, as it prevents the vehicle from rolling while the inspection is being conducted. When a tractor-trailer is parked, ensuring that the wheels are securely chocked provides stability and protects not only the inspector but also anyone else in the vicinity. With the wheels chocked, you can confidently perform checks on other systems, such as the engine, tires, brakes, and cargo, without the risk of inadvertent movement.

Taking this step first ensures that the entire inspection process is done safely, allowing the driver to focus on each aspect of the vehicle without safety concerns. Prioritizing safety in this way is essential for ensuring a thorough and effective pre-trip inspection, which ultimately contributes to road safety overall.