Which component is driven by the Power Turbine to deliver shaft power to the load?

• A. Reduction Gearbox
• B. Axial Compressor
• C. Gas Generator
• D. Power Turbine

Answer: (A)

The key idea is that the Power Turbine provides shaft power, but it must be transmitted to the load through a gearbox that reduces speed and increases torque. The component that receives and passes on this power is the reduction gearbox, which is driven by the Power Turbine. This gearbox takes the high-speed output from the turbine and converts it to the lower speed, higher torque necessary for the load. The axial compressor is driven by the gas generator turbine, not the power turbine, and the gas generator itself powers the turbine that drives the power turbine. So, the reduction gearbox is the element that the Power Turbine drives to deliver shaft power to the load.