On a hill, which wheels should be chocked as a standard practice?

• A. Rear Wheels
• B. Front Wheels
• C. Both Front and Rear
• D. No Wheel Chocks

Answer: (B)

When a vehicle is on a hill, gravity tends to move it downhill, so you chock the wheels on the down-slope side to prevent any rolling. In this common testing scenario, the down-slope wheels are the front wheels, so placing chocks against the front tires blocks forward movement if the parking brake ever slips. This adds a reliable safeguard beyond the brake, making it standard practice. If the vehicle were parked the other way (rear downhill), you’d chock the rear wheels instead. Not using chocks on an incline leaves the vehicle vulnerable to creeping, which is why chocking the downhill wheels is the recommended approach.