FAA Powerplant Written Practice Test

What is the function of an exhaust cone assembly in a turbine engine?

1. To increase engine pressure

2. To reduce fuel consumption

3. To straighten and collect the exhaust gases into a solid exhaust jet

4. To filter out impurities from exhaust

The correct answer is: To straighten and collect the exhaust gases into a solid exhaust jet

The function of an exhaust cone assembly in a turbine engine is primarily to straighten and collect the exhaust gases into a solid exhaust jet. This process is essential for ensuring the efficient outflow of gases and maximizing thrust. As the exhaust gases exit the turbine, their direction can be somewhat turbulent and spread out. The exhaust cone helps streamline this flow, reducing the amount of turbulence and allowing for a more concentrated jet of exhaust. By achieving a more uniform and directed exhaust stream, the cone assembly contributes to improved overall engine performance and efficiency. This streamlined flow is critical for optimizing thrust and can have significant implications for the aerodynamics of the aircraft, impacting speed and fuel efficiency positively. Options related to increasing engine pressure, reducing fuel consumption, and filtering impurities do not accurately describe the primary function of the exhaust cone assembly. While these elements may relate to different components or aspects of turbine engine operation, they do not pertain directly to the role of the exhaust cone in shaping and directing the exhaust gases.