FAA Powerplant Written Practice Test

Which statement regarding inlet icing of turbine engines is true?

1. All engines prevent icing automatically

2. Most turboprop engines rely on electrical anti-icing

3. Inlet icing does not affect performance

4. Icing is only a concern at low altitudes

The correct answer is: Most turboprop engines rely on electrical anti-icing

Most turboprop engines utilize electrical anti-icing systems to prevent ice formation on the engine inlets. This is crucial because ice can disrupt the airflow into the engine, leading to potential performance degradation and even engine failure. These electrical systems typically involve heating elements that operate as the aircraft ascends into colder air, where icing conditions are more likely. In contrast, other types of engines, such as turbojet engines, may rely on bleed air or other methods for anti-icing, but turboprops specifically use electrical systems as a primary means. Understanding this differentiation is essential for recognizing how different engine types manage inlet icing risks effectively, thereby ensuring safe operation in various atmospheric conditions.