Question 155General Subjects - Assistant Engineer

The correct answer is D) Dead band. The dead band refers to the change in speed required before a speed control governor will initiate corrective action as the load changes. This is the range of speed variation within which the governor does not take any action to adjust the engine's speed. The dead band is a design parameter that allows for minor speed fluctuations without triggering the governor's response, preventing excessive hunting or oscillation of the engine's speed. The other options are incorrect because: A) Promptness refers to how quickly the governor responds to a speed change, not the amount of speed change required. B) Power refers to the engine's output, not the speed control parameters. C) Sensitivity refers to the governor's ability to detect small speed changes, not the dead band.