Question 566Steam Plants - Assistant Engineer

The correct answer is A) E. The element labeled "E" in the illustration SE-0009 of the turbo-generator governing system provides the follow-up mechanism to prevent the nozzle valves from cycling between the fully open and fully closed positions. This follow-up mechanism is a critical component that helps maintain the stability of the turbine speed by dampening rapid changes and preventing the valves from oscillating. The other options are incorrect because they do not directly correspond to the follow-up mechanism in the governing system. Option B) H likely represents the speed setting device, Option C) O could be the overspeed trip, and Option D) D may be the nozzle control valve, but none of these components specifically provide the follow-up function described in the question.