A blocking device used to prevent vehicles from moving is called a(n)

• A. Parking brake
• B. Chock block
• C. Wheel clamp
• D. Tie-down strap

Answer: (B)

Wheel chocks are wedge-shaped blocks placed snugly against a vehicle’s wheels to stop it from moving. They create a physical barrier between the wheel and the ground, so the wheel can’t roll even if the brakes aren’t engaged or the surface isn’t perfectly flat. For best effect, put them on the downhill side of the wheel and use them on both sides when possible, especially during loading, unloading, or parking on a slope. This approach is more reliable than relying on a parking brake, which can fail, and different from a wheel clamp that grips the wheel to immobilize the vehicle or a tie-down strap that secures cargo rather than stopping wheel movement.