What are the major sections of a turbine engine, in order?

• A. Inlet, Compressor, Turbine, Combustion, Exhaust
• B. Inlet, Combustion, Compressor, Turbine, Exhaust
• C. Inlet, Compressor, Combustion, Turbine, Exhaust
• D. Inlet, Turbine, Combustion, Compressor, Exhaust

Answer: (C)

Think of a turbine engine as a path that air follows from intake to exhaust, with stages that increase energy, add energy, and then extract some of that energy to do work. The air first enters the inlet to be guided smoothly into the engine. It then passes through the compressor, which raises the air’s pressure and density, preparing it for efficient combustion. In the combustion chamber, fuel is added and burned, turning chemical energy into high-temperature, high-pressure gases. Those gases then flow through the turbine, where their energy is partially used to turn the compressor and other parts of the engine. Finally, the remaining gas energy is expelled through the exhaust as the gases exit the engine. So the correct order is inlet, compressor, combustion, turbine, exhaust.

Why the other orders don’t fit: combustion must come after air is compressed to maximize efficiency and control of the flame; placing combustion before the compressor would mean burning fuel without pressurized air and wouldn’t drive the engine components properly. The turbine has to come after combustion to extract energy from the high-energy gases; putting the turbine before combustion would leave no high-energy gas to drive it.