Which parameter is detected by the turbine engine fuel control unit?

• A. Power lever position
• B. Ambient humidity
• C. Oil viscosity
• D. Coolant temperature

Answer: (A)

The main idea here is that the fuel control unit meters fuel based on the pilot’s thrust command, which is conveyed by the position of the power lever. The control unit interprets where the power lever is set and schedules the corresponding fuel flow to achieve that commanded thrust, using engine speed and other sensors for feedback and safety limits. Ambient humidity, oil viscosity, and coolant temperature aren’t direct inputs used by the fuel control unit to determine metered fuel in this context, so they don’t drive the fuel metering decision in the same way.