Gas Turbine Engines Components, Inspection, Systems, And Maintenance Practice Test

Which anti-icing method uses hot air drawn from the engine to heat the inlet?

Engine bleed air heating Electrical heating Passive thermal blankets Fuel preheating

Correct Answer:

Engine bleed air heating

Explanation:

Hot-air anti-icing of the engine inlet uses bleed air from the compressor to heat the nacelle leading edge. This hot, high-pressure air is tapped from the engine, routed through ducts to the inlet, and heats the surface to prevent ice from forming. It’s effective because it provides rapid, controllable heat using energy already produced by the engine, with bleed-air valves regulating the temperature as icing conditions change. Electrical heating would rely on electrical power and heat the surface with resistive elements; passive thermal blankets only insulate and don’t generate heat; fuel preheating warms the fuel, not the inlet.

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