134. Which of the listed parts illustrated in the turbo-generator governing system, provides the follow-up to prevent the nozzle valves from cycling between the fully open and fully closed positions, with each variation in turbine speed

Part E, the pilot valve sleeve, provides follow-up by recentering the pilot valve after nozzle valve movement, preventing oscillation between fully open and fully closed positions due to turbine speed variations. This mechanism is linked to the restoring linkage and moves in response to the operating piston, returning the pilot valve to neutral and stabilizing turbine speed.