You have to change the front-right wheel of your biaxial motor vehicle. You apply a wheel chock to prevent the vehicle from accidentally rolling off. What must you be aware of when doing so?

You answered correctly. When using a wheel chock while changing the front-right wheel of a biaxial vehicle, you must ensure the vehicle is on the most stable ground to prevent movement. The chock should be placed at a wheel on the rear axle, not on the axle being lifted or worked on. Placing the chock on the rear axle provides better stability and safety while changing the front wheel. These precautions help prevent the vehicle from accidentally rolling. Always avoid placing the chock on the wheel being changed or on unstable surfaces. Following these steps ensures your safety during tire changes in similar situations.