What is the proper test for whether hand brakes will hold a train laid up on a grade?

The appropriate test for whether hand brakes will hold a train laid up on a grade is to place the brake valve in release. This action allows the operator to determine if the hand brakes are indeed engaged and can withstand the gravitational forces acting on the train when it is on an incline.

When the brake valve is placed in release, it is essential to observe if the train remains stationary. If the train rolls, it indicates that the hand brakes are either not set properly or have failed to hold the weight of the train on the slope. Therefore, this procedure is vital in ensuring the safety and stability of the train while it is parked on a grade.

Employing other methods, such as applying the emergency brake, engaging the throttle, or checking for gas leakage, does not directly test the holding capability of the hand brakes under the conditions presented by a grade. Each of those methods serves different purposes and ensures the safety of the operation but does not specifically evaluate the effectiveness of the hand brakes in holding a stationary train.