🔍 Key Concepts

• How the power piston in a hydraulic governor converts oil pressure into mechanical force on the fuel linkage • What sets speed droop in this type of governor (look at the speed droop lever, speeder spring, and related adjustments) • The difference between governor settings/characteristics (droop, overspeed trip) and governor capacity or output force

💭 Think About

• Trace the force path: if the oil pressure acting on the power piston increases, what happens to the force it can apply to the terminal shaft and the fuel control? • Ask yourself whether changing oil pressure on the power piston actually changes the governor’s internal speed‑setting geometry (speeder spring, speed droop lever) or just changes how strongly it can move the fuel linkage. • Which of the listed options refers to an adjustable setting made by the operator, and which refers to a resulting mechanical capability of the governor?

✅ Before You Answer

• Identify what parts in the illustration are labeled for speed droop adjustment versus those connected directly to the power piston and terminal shaft. • Verify whether the overspeed trip is shown as a separate mechanical device or directly controlled by power‑piston oil pressure. • Decide which option describes a change in mechanical output force rather than a change in the governor’s speed‑droop or overspeed‑trip settings.