If the engine-driven high pressure pump fails, what will happen to the engine?

• A. It will overheat
• B. It will stall
• C. It will flame out
• D. It will slow down

Answer: (C)

When the engine-driven high pressure pump fails, the engine is unable to obtain the fuel it requires to maintain combustion. This lack of adequate fuel leads to a condition known as 'flame out.' Flame out occurs when the combustion process in the engine is interrupted or cannot continue, causing the engine to lose power and effectively shut down.

In this scenario, the high pressure pump is critical for delivering fuel at the appropriate pressure to the engine. Without this pressure, fuel cannot atomize properly for combustion, resulting in the engine losing the necessary energy to sustain operation. As a result, the engine experiences a flame out, meaning it stops producing thrust and can no longer operate.

Understanding this process is crucial for recognizing the importance of the engine's fuel system and the role of the high pressure pump in maintaining engine performance.