Question 245Motor Plants - 1st Asst/Chief

The correct answer is D) The dial type adjusting knob is used for setting speed droop and damping out hunting. The governor's function is to maintain a constant engine speed despite changes in load. The dial type adjusting knob allows the operator to set the desired amount of speed droop, which is the intentional reduction in engine speed under load. This droop helps prevent the engine from racing or "hunting" when the load changes. The adjusting knob also controls the damping, which stabilizes the governor's response to changes in load and prevents oscillations. The other options are incorrect because they do not accurately describe the primary function of the governor's adjusting knob. Option A discusses the accumulators, which are not directly related to the adjusting knob's purpose. Option B incorrectly describes the role of the speed droop lever spring, which is a separate component from the adjusting knob.