On a grade, where should hand brakes be set up on two cars of an eight-car train?

When setting hand brakes on a train located on a grade, it is important to ensure that the train remains stable and does not roll or slide down the incline. The correct placement of hand brakes should be on the cars that are positioned closest to the downward slope where the gravitational force is likely to act.

Placing hand brakes on the last two cars, which are Cars 7 and 8, is a strategic approach as it helps to anchor the train against the pull of gravity on the gradient. By securing the rear of the train, it prevents any movement of the train as a whole, especially if the parking brake system or the dynamic brake system becomes compromised or if the train is improperly balanced.

Choosing the front cars, such as Cars 1 and 2, or mid-train cars does not provide the same level of security against potential rolling motion, as they would not effectively counteract the gravitational forces acting on the entire train length. Therefore, setting the hand brakes on Cars 7 and 8 ensures optimal safety and control on a grade.