The turbine rotor assembly consists of which components?

• A. Turbine rotor blade, rotor disk, rotor shaft
• B. Turbine nozzle, inner cone, struts
• C. Ignitor plug, fuel nozzle, exhaust duct
• D. Combustion chamber, igniter, fuel pump

Answer: (A)

The moving part of the turbine that actually converts the hot gas energy into mechanical power is built from three pieces: turbine rotor blades, a rotor disk, and a rotor shaft. The blades are the work elements that extract energy from the high-velocity gas. They are mounted into the rotor disk, which acts as the hub and provides the structural support for all the blades. The rotor shaft then transmits the rotational energy from the turbine to drive the compressor or other loads.

The other components listed belong to different parts of the engine. Turbine nozzles, inner cones, and struts are part of the gas flow guidance and stator assemblies, not the rotating rotor. Ignitor plugs, fuel nozzles, and exhaust ducts are associated with the combustion and exhaust sections, not the rotor itself.