What is the second step in the Light Engine Running Consist Test?

What is the second step in the Light Engine Running Consist Test?

• A. Notch up to 10 mph
• B. Release independent
• C. Apply light independent until it catches
• D. Actuate

Answer: (A)

The main idea here is to move from starting the engine to establishing controlled motion in a safe, observable way. After actuating the locomotive, the next step is to notch up to a low, controlled speed—specifically 10 mph—to verify that the powertrain responds smoothly and the locomotive begins to move reliably. This establishes a clear, measurable condition under which you can assess throttle response, traction, and overall control before advancing to later steps. Notching up to 10 mph is preferable to the other options because it directly tests motion and reaction to throttle without introducing braking actions or skipping the initial power-up. Releasing independent would come after motion is established, and applying light independent until it catches presumes motion and is meant for a later check, not the immediate second step. Actuating is the first step, so it isn’t the correct second move.

The main idea here is to move from starting the engine to establishing controlled motion in a safe, observable way. After actuating the locomotive, the next step is to notch up to a low, controlled speed—specifically 10 mph—to verify that the powertrain responds smoothly and the locomotive begins to move reliably. This establishes a clear, measurable condition under which you can assess throttle response, traction, and overall control before advancing to later steps.

Notching up to 10 mph is preferable to the other options because it directly tests motion and reaction to throttle without introducing braking actions or skipping the initial power-up. Releasing independent would come after motion is established, and applying light independent until it catches presumes motion and is meant for a later check, not the immediate second step. Actuating is the first step, so it isn’t the correct second move.