What is the correct sequence of engine fuel movement?

The correct sequence of engine fuel movement involves the movement from a low-pressure pump to a high-pressure pump, and then through a filter before reaching the combustion system. The low-pressure pump is responsible for drawing fuel from the tank and ensuring it reaches the high-pressure pump, which then boosts the pressure to the necessary level for efficient engine operation.

This is crucial because the high-pressure pump needs to supply fuel at the correct pressure to the fuel delivery system, ensuring that the fuel can effectively atomize as it enters the combustion chambers, allowing for optimal combustion and engine performance. The inclusion of a filter in this process helps to remove any contaminants that may have been present in the fuel, protecting the sensitive components downstream, including the fuel control unit and ultimately the fuel injectors.

In the context of this question, the other sequences presented do not accurately represent the standard fuel flow process in aircraft engines. Thus, sequence C accurately describes the step-by-step movement of fuel through the necessary components, beginning with the low-pressure pump and ending with effective fuel delivery to the engine.