What is the primary function of the fuel manifold and nozzles?

• A. To measure fuel pressure
• B. To supply primary and secondary fuel flow
• C. To evacuate excess fuel
• D. To purify the fuel

Answer: (B)

The primary function of the fuel manifold and nozzles is to supply both primary and secondary fuel flow to the engine. In aircraft fuel systems, the manifold plays a crucial role in distributing fuel from the fuel tanks to the various engine components. The nozzles are designed to atomize the fuel, ensuring that it is mixed efficiently with air for optimal combustion in the engine.

By delivering fuel at the necessary pressure and in the correct amount, the fuel manifold and nozzles support the engine's performance across different operational ranges. They help maintain the necessary fuel-air mixture for efficient combustion, which is essential for engine performance, fuel efficiency, and overall safety during flight operations.