Question 114Motor Plants - Assistant Engineer

The correct answer is B) Set the fuel rack to zero. The first step in reversing a direct reversing, large, slow-speed, main propulsion, diesel engine is to set the fuel rack to zero. This immediately cuts off the fuel supply to the engine, causing it to begin slowing down. This is a critical safety step to ensure the engine can be brought under control before attempting any other actions. The other options are incorrect because they do not represent the appropriate first step. Manually tripping the overspeed device (A) and disengaging the safety interlock (C) may be necessary later in the process, but should not be the initial action. Sliding the camshaft to the neutral position (D) is also not the correct first step, as this would not immediately affect the engine's operation.