What is the proper test for determining if hand brakes will hold a train on a steep grade?

To determine if hand brakes will hold a train on a steep grade, performing a rolling test is the appropriate method. This test involves placing the train in a position where it can roll downhill in a controlled manner to assess the effectiveness of the hand brakes.

When the hand brakes are applied, the train should remain stationary on the incline. If it begins to roll, this indicates that the hand brakes may not be functioning properly or that they do not have sufficient stopping power to hold the train against the slope. The rolling test provides a direct observation of the brakes' effectiveness in a realistic scenario, ensuring that they can adequately prevent movement on an incline.

Using the emergency brake or checking air pressure levels, while important for overall safety and operation, do not specifically test the hand brakes' holding capacity against gravitational forces on a steep grade. Additionally, placing a brake valve in release would not contribute to testing the hand brakes; rather, it would disengage the brake system entirely. Thus, the rolling test is the most effective and direct way to assess the holding capability of the hand brakes in this context.