Question 396Motor Plants - Assistant Engineer

The correct answer is D) The speed droop lever spring prevents the engine from racing or hunting by arresting the movement of the power piston after a speed change. This is correct because the governor's primary function is to maintain a constant engine speed by adjusting the fuel supply in response to load changes. The speed droop lever spring helps dampen speed fluctuations and prevent the engine from overshooting the desired speed, which could lead to engine damage or instability. The other options are incorrect - option A refers to a different component, option B describes a different function of the governor, and option C does not accurately describe the role of the accumulators in the governor system.