FAA Powerplant Written Practice Test

What is the effect of operating an engine at or above 165°F?

1. It helps ensure normal operational performance

2. It prepares the engine for long-term storage

3. It contributes to reducing engine corrosion

4. It increases the efficiency of the fuel consumption

The correct answer is: It contributes to reducing engine corrosion

Operating an engine at or above 165°F is significant because this temperature range is generally effective in minimizing moisture accumulation and reducing the risk of engine corrosion. Corrosion can develop in engines due to the presence of moisture and contaminants, which can condense inside the engine during lower temperature operations. By maintaining a temperature at or above 165°F, you help ensure that any moisture evaporates, thereby preserving engine components and prolonging engine life. This operational practice also assists in optimizing engine performance, as corrosion can lead to various issues such as pitting, wear, or failure of engine components, which can ultimately affect the engine's reliability and safety. Thus, maintaining an operational temperature that minimizes the likelihood of corrosion is essential for long-term maintenance and operational integrity.