What does "chock the wheels" refer to in ramp operations?

The phrase "chock the wheels" refers specifically to the safety practice of placing wheel chocks around the aircraft's wheels to prevent it from moving or rolling while stationary. This procedure is crucial in ramp operations, as it ensures that the aircraft remains securely in place during boarding, deboarding, or when ground crew are performing maintenance or loading cargo.

Using wheel chocks mitigates the risk of accidents that could occur if the aircraft were to inadvertently roll, especially on a slope or during windy conditions. Proper training emphasizes the importance of this step as a fundamental safety measure in aviation ground handling procedures.

The other options do not align with the meaning of the phrase; starting the engines, cleaning tires, or inflating them are all separate actions that do not directly pertain to preventing movement of the aircraft while on the ground.