What automatic brake settings will automatically bail off the locomotive brakes?

The correct answer focuses on the "Minimum and Light" settings when discussing automatic brake settings that will automatically bail off the locomotive brakes. In railway operations, "bail off" refers to the process whereby air pressure is allowed to escape from the brake cylinders, thereby releasing the brakes.

In the context of brake settings, "Minimum" and "Light" correspond to the lower levels of braking force. When these settings are applied, they are designed to reduce the pressure in the system to a point where the brakes can be fully released, allowing for smoother operation and transitions, especially during maneuvers that require limited stopping force. This is critical for maintaining control of the locomotive and ensuring the safe and efficient movement of the train.

Higher settings such as "Maximum" and "High" would apply greater braking force, which does not support the bail-off function, as the brakes remain engaged to manage speed effectively. Similarly, settings like "Medium" and "Low" do not specifically indicate the conditions under which brakes would automatically bail off. Thus, the "Minimum and Light" settings are appropriately aligned with the operational protocols associated with releasing or bailing off the locomotive brakes.