During vehicle stabilization on a leveled surface, what is a commonly used method to keep the vehicle from moving?

• A. Wheel chocks
• B. Cribbing under tires
• C. Blocking with a spare tire
• D. Engaging the parking brake

Answer: (A)

Wheel chocks provide a positive, physical restraint that stops a tire from rolling. When you’re stabilizing a vehicle on a leveled surface, placing a wedge against the tire—snugly, on the side that would prevent movement in the direction of potential roll, and typically on both sides of the wheel if needed—locks the wheel in place. This method remains effective even if the vehicle’s parking brake isn’t fully reliable, and it directly prevents motion rather than relying on brakes or lifting supports alone. Cribbing under tires or blocking with a spare tire aren’t as reliable or straightforward for simply keeping a vehicle from moving, and relying solely on the parking brake isn’t as foolproof.