Which of the following is a function of the air inlet section?

• A. It delivers air to the compressor inlet with a minimum of turbulence and pressure variation
• B. It recovers as much total pressure as possible and delivers it to the front of the engine
• C. It cools the incoming air before compression
• D. It filters particulates after the compressor

Answer: (A)

The air inlet’s job is to deliver air to the compressor inlet with minimal turbulence and pressure variation. When the flow is smooth and uniform, the compressor can ingest air efficiently, operate more predictably across different speeds and attitudes, and avoid flow disturbances that could lead to surge or decreased performance. While an inlet may incorporate a diffuser to recover some pressure, its primary function is providing a steady, low-distortion flow to the compressor. The other options describe tasks not performed by the inlet: cooling the air, filtering after the compressor, or maximizing total pressure recovery by itself.