What role do filters play in an aircraft's fuel system?

Filters in an aircraft's fuel system are essential for ensuring that the fuel reaching the engine is clean and free of contaminants. Aircraft fuel can contain various impurities, such as dirt, rust, water, and other particulates that could negatively impact engine performance. The role of filters is to capture these contaminants before the fuel is delivered to the engine, thus maintaining fuel purity and protecting sensitive engine components.

This prevention of contamination is crucial because any impurities can lead to issues such as fuel injector blockage, decreased engine efficiency, and even engine failure in severe cases. By effectively removing these unwanted particles, filters help ensure reliable operation and enhance the longevity of the engine and other fuel system components.

Given the options provided, the correct answer highlights this critical function of filters in maintaining the integrity of the fuel system, which is vital for the safe and efficient operation of the aircraft.