When should the brakes be set on a dolly?

Setting the brakes on a dolly is an essential step for ensuring safety and stability when the dolly is at rest. The correct choice emphasizes that the brakes should be engaged after the dolly is no longer in transit. Doing so helps prevent accidental movement or rolling of the dolly, which could lead to potential accidents, injuries, or damage to equipment and surroundings.

Once the dolly has reached its destination and is no longer being moved, activating the brakes secures it in place. This practice is critical, especially in environments where other activities are taking place or where the dolly may be positioned on an incline. In contrast, applying brakes while the dolly is still moving or before loading it does not adequately ensure safety and can lead to dangerous situations. Hence, engaging the brakes only after ensuring the dolly is stationary is a fundamental best practice.