What can help easily move the hand brake wheel or lever to release the brake?

A hand brake is typically a mechanical device that is engaged to keep the train stationary while it is not in motion. Releasing the hand brake can sometimes require significantly more effort, particularly if it has been applied firmly or if there is rust or debris affecting its operation.

Using an emergency brake application can help in certain scenarios by reducing the friction or tension in the brake system, which can make it easier to release the hand brake. When an emergency application is made, it can alter the state of the brake system, making it less rigid and allowing for easier manipulation of the hand brake wheel or lever.

The other options do not effectively address or improve the situation of releasing the hand brake. Applying more weight on the lever could actually increase the force required to move it. Using a secondary brake does not directly assist in releasing the primary hand brake and may add complexity without effectively addressing the release process. Increasing the train speed does not assist in the process of releasing the hand brake and could be counterproductive by putting more stress on the brake system. Therefore, the correct response highlights a practical action that can facilitate the release of the hand brake.