What is the function of inlet anti-ice and how is it typically implemented?

• A. To prevent ice formation on the inlet lip; implemented using bleed air heating or electrical heating.
• B. To recycle exhaust gas.
• C. To cool the turbine blades.
• D. To reduce fuel consumption.

Answer: (B)

Inlet anti-ice is about preventing ice from forming on the engine inlet lip and along the ducting so that air can flow smoothly into the compressor. It’s typically implemented by heating the inlet area, using either hot bleed air drawn from the engine’s compressor or electrical heating elements built into the inlet. Bleed-air heating warms the lip and walls to keep the surface above freezing, while electric heaters provide direct heat where needed. This prevents ice buildup that could block or distort the airflow, which could lead to compressor surge or reduced engine performance in cold, humid conditions. Recycling exhaust gas, cooling turbine blades, or reducing fuel consumption are not functions of inlet anti-ice; they relate to other systems or goals in engine operation.