Question 481Motor Plants - Assistant Engineer

The correct answer is D) low governor power. The hunting of a diesel engine is often caused by low governor power. The governor is responsible for maintaining the engine's speed within a desired range. If the governor does not have enough power to effectively control the engine's speed, it can result in fluctuations or "hunting" of the engine speed. This instability is typically a result of insufficient governor power to overcome the engine's load changes. The other options are incorrect because they do not directly address the root cause of the hunting behavior. Excessive speed droop, insufficient speed droop, and excessive sensitivity are not the primary factors that would lead to hunting in a diesel engine.