FAA Powerplant Written Practice Test

What is the primary function of a carburetor air scoop?

1. To filter impurities from the air

2. To supply air to the carburetor

3. To cool the engine

4. To decrease fuel consumption

The correct answer is: To supply air to the carburetor

The primary function of a carburetor air scoop is to supply air to the carburetor. The carburetor requires a steady flow of air for the proper mixing of fuel and air, creating the combustible mixture necessary for engine operation. The air scoop is strategically placed on the aircraft to capture and direct incoming air into the carburetor. This design is critical for ensuring that the engine receives an adequate and consistent supply of air, especially during operation at varying speeds and altitudes. Without this function, the carburetor would not be able to effectively meter the airflow needed for the engine to function optimally. While other functions like filtering impurities or affecting fuel consumption might be relevant in different contexts, they are not the primary role of the air scoop itself.