Before leaving a heavy vehicle unattended, which steps should you perform?

Before leaving a heavy vehicle unattended, which steps should you perform?

• A. Chock the wheels, remove the keys, and set the parking brake
• B. Set the parking brake, remove the keys, and chock the wheels
• C. Remove the keys only
• D. Set the parking brake only

Answer: (B)

When leaving a heavy vehicle unattended, the goal is to prevent movement and unauthorized use. The best approach is to apply the parking brake to hold the vehicle, remove the keys so it can’t be started, and place wheel chocks to create a physical block against rolling. Relying on the parking brake alone can fail or slowly release, and removing the keys alone doesn’t stop movement if the brakes aren’t engaged. Wheel chocks provide a strong extra safeguard, especially on slopes or if there’s any brake drag. Using all three steps together gives redundancy and the highest level of safety, which is why this option is the correct one.

When leaving a heavy vehicle unattended, the goal is to prevent movement and unauthorized use. The best approach is to apply the parking brake to hold the vehicle, remove the keys so it can’t be started, and place wheel chocks to create a physical block against rolling. Relying on the parking brake alone can fail or slowly release, and removing the keys alone doesn’t stop movement if the brakes aren’t engaged. Wheel chocks provide a strong extra safeguard, especially on slopes or if there’s any brake drag. Using all three steps together gives redundancy and the highest level of safety, which is why this option is the correct one.