Gas Turbine Engines Components, Inspection, Systems, And Maintenance Practice Test

The key idea is that fuel metering is controlled electronically in modern turbines. FADEC, or the Full Authority Digital Engine Control, uses a digital computer to read engine sensors and operational inputs, run control logic, and precisely schedule fuel flow through actuators. This electronic approach provides accurate metering, rapid response to changing conditions, and built‑in protective limits for things like overspeed or high temperatures. Older and alternative systems rely on non-electronic means: hydromechanical controls use hydraulic servos and mechanical linkages to govern fuel flow; mechanical controls are purely mechanical linkages without electronic sensing or control; pneumatic schemes use air pressure for control in some configurations. Among these, FADEC/electronic stands out as the electronic form of turbine fuel control.