What is the purpose of chocks in vehicle stabilization?

• A. To lift the vehicle.
• B. To slow traffic.
• C. To prevent wheel movement and help secure the vehicle.
• D. To attach patient harness.

Answer: (C)

Chocks prevent wheel movement and help secure the vehicle during stabilization. They are placed against the tires to block any rolling or shifting as you apply cribbing, set up stabilization, or adjust the vehicle’s position. By stopping the wheels from turning or slipping, chocks create a stable base so the crew can work safely without the vehicle shifting unexpectedly. They’re typically used on wheels that could move, placed firmly against the tire and the ground, and left in place until the vehicle is fully stabilized or ready to be moved. Chocks are not used to lift anything or to attach a patient harness; their purpose is specifically to lock wheel movement to keep the vehicle from rolling.