General Authority of Civil Aviation (GACA) Aeronautical Information Publication (AIP) Practice Exam

The function of the air cleaner in the B777-200 is to remove contamination from the air. This component is essential in ensuring that the air entering the engines is as clean as possible. Contaminants can include dust, dirt, and other particulates that could negatively impact engine performance and efficiency. By filtering out these impurities, the air cleaner helps to maintain the integrity of the fuel-air mixture, which is crucial for optimal combustion and overall engine operation.

Air quality control is vital for the longevity of engine components and efficient functioning, and the air cleaner plays a critical role in achieving this. The other options relate to functions not served by the air cleaner; airflow increasing, cabin temperature maintenance, and engine cooling are handled by different systems and components within the aircraft.