What must be applied to the equipment during an evacuation to prevent it from rolling away?

To prevent the equipment from rolling away during an evacuation, applying handbrakes is essential. Handbrakes are designed to securely hold rail vehicles in place when they are stationary, serving as a critical safety feature. By engaging the handbrakes, you ensure that the equipment remains immobilized, which is particularly important in evacuation scenarios where safety and stability are paramount. This action minimizes the risk of movement that could lead to accidents or injury during the evacuation process.

Other methods, like using chocks or brakes, might be effective in certain contexts, but handbrakes are specifically intended for this purpose. Chocks can be used with wheels to prevent rolling, but handbrakes are generally the standard practice in rail operations. Similarly, while brakes can stop equipment from moving while in operation, they do not provide the same immobilization as handbrakes when stationary. Locks are not typically used for this purpose in a rail context. Thus, the application of handbrakes is the most appropriate and widely accepted practice for securing equipment during an evacuation.