FAA Powerplant Written Practice Test

What is the purpose of the economizer system in a float-type carburetor?

1. Reduces fuel consumption

2. Increases the fuel/air ratio at higher power settings

3. Maintains the fuel temperature

4. Controls engine speed

The correct answer is: Increases the fuel/air ratio at higher power settings

The purpose of the economizer system in a float-type carburetor is to increase the fuel/air ratio at higher power settings. This is important because, as the engine operates at higher power levels, the demand for fuel increases to ensure proper performance and efficiency. The economizer system allows for additional fuel to be introduced into the airstream, enriching the mixture when the throttle is opened fully. This is crucial for optimizing engine performance during high power scenarios, as a richer fuel mixture helps maintain engine operation without causing lean conditions that could lead to engine knocking or overheating. The ability to adjust the fuel/air mixture dynamically is essential for effective engine management and is one of the key functions of the economizer system in a float-type carburetor. Other elements related to the float-type carburetor, such as reducing fuel consumption or controlling engine speed, serve different functions and are not the primary role of the economizer system.