A turbo-generator governing system maintains...

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Question 1 of 205eccefa1bacbc34ba4d471f3

A turbo-generator governing system maintains constant turbine speed by using a flyweight-actuated pilot valve to control hydraulic oil flow to a lifting beam operating cylinder, which in turn, __________.

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🔍 Key Concepts

• Turbine governing systems: how speed is controlled in reaction/impulse turbines • The role of a lifting beam and operating cylinder in moving steam-control elements • Difference between throttle governing and nozzle governing of steam turbines

💭 Think About

• Trace the sequence: flyweights sense speed → pilot valve moves → oil to operating cylinder → lifting beam moves → what steam-controlling part is actually moved? • Ask yourself: in a turbo‑generator that must hold nearly constant speed over a wide load range, is it more common to vary main throttle opening, individual nozzles, or system pressures? • Consider what component the lifting beam is mechanically linked to in typical marine turbine installations—what does it physically move?

✅ Before You Answer

• Verify which option directly changes the steam flow rate into the turbine rather than downstream conditions like pressure or back pressure • Eliminate any choices that describe system pressure control instead of mechanical position control of a steam‑admitting element • Check marine engineering references for the connection between the governor lifting beam and either the throttle valve or nozzle valves in a turbo‑generator

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