What is the primary purpose of a wheel chock?

• A. A wheel chock is a block placed against the outer curve of a tire to prevent the apparatus from rolling.
• B. A wheel chock is used to measure tire pressure.
• C. A wheel chock is a device for towing trailers.
• D. A wheel chock is a hydraulic pump used in wheel maintenance.

Answer: (A)

Wheel chocks are used to stop movement by preventing a wheel from rolling. They are wedge-shaped blocks placed against the wheel and the ground to create a physical barrier that resists the wheel’s rotation, which is essential when you park on a slope or work on the apparatus to keep it from moving.

They’re not for measuring tire pressure, towing trailers, or acting as a hydraulic pump. For best safety, place chocks on the downhill side of the wheels (often on both sides of the wheel when possible) and ensure the vehicle is on a stable surface before relying on them.