DART Rail Institute Definitions Practice Exam 2026 - Free Rail Institute Definitions Practice Questions and Study Guide

Braking on the master controller is provided in graded steps, and the smallest deceleration available is labeled B-Min. This minimum brake setting delivers the gentlest brake application, allowing for smooth speed control and gradual stopping without applying more force than needed. Higher brake levels are used for stronger deceleration, and emergency braking is the maximum, used only in urgent situations. A variant like B-Min-B-3 isn’t the baseline minimum and would produce more braking than the simple minimum. Consist is unrelated to braking force. So the lowest form of braking on the master controller is B-Min.