🔍 Key Concepts

• Speed governor action on a steam turbine (how small position changes change turbine speed) • How the motor-driven synchronizer mechanically connects into the governor linkage in figure SE-0009 • Which part of the governor device actually changes speed setting without changing load suddenly

💭 Think About

• Trace the path from the motor-driven synchronizing device (figure "D") into the governor: which component does its motion act on first? • Ask yourself: to fine-tune speed, do we usually adjust the main steam valve directly, or do we slightly change the governor speed setpoint so the governor adjusts the valve for us? • Look at points labeled near the pilot valve and operating spring: which of the listed choices is physically reachable by the small motor and its worm gear in the drawing?

✅ Before You Answer

• Verify which element in the choices is mechanically linked to the small motor and worm gear shown as the synchronizing device. • Confirm which adjustment would produce a small, gradual change in valve opening rather than a sudden step change. • Check the illustration for any linkage that raises/lowers or repositions a part in the governor head or pilot valve assembly rather than working on the main steam valves.