General Authority of Civil Aviation (GACA) Aeronautical Information Publication (AIP) Practice Exam

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What is a condition that indicates the potential for fuel imbalance?

  1. Fuel pumps are ON

  2. A fuel quantity low alert is displayed

  3. Cross-feed valves are closed

  4. Ground speed exceeds 200 knots

The correct answer is: A fuel quantity low alert is displayed

A fuel quantity low alert being displayed is a significant indication of potential fuel imbalance within the aircraft's fuel system. This alert typically arises when one or more tanks are nearing empty, suggesting that fuel is being consumed at differing rates across the tanks. Fuel imbalance can lead to asymmetric weight distribution, which impacts the aircraft's handling characteristics and performance. In contrast, the presence of fuel pumps being ON, closed cross-feed valves, or ground speed exceeding 200 knots does not directly indicate problems with fuel distribution or imbalance. While these factors are important in understanding fuel system operations, they do not signal the same urgency regarding fuel quantity and allocation that a low fuel quantity alert does. This makes a low fuel quantity alert a critical warning that flight crews must address promptly to ensure safe operations.

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