How long will an aircraft weighing 4,000 lb take to consume fuel at an airport pressure altitude of 2,000 ft?

To determine how long an aircraft weighing 4,000 lb will take to consume fuel at an airport pressure altitude of 2,000 ft, one must consider the fuel burn rate, which is often expressed in pounds per hour. At higher altitudes, the efficiency of the engine and the fuel flow can change due to environmental conditions.

In this scenario, if the fuel consumption rate is known (often specified in the aircraft's operating handbook), you can calculate the total fuel consumed over time. For instance, if the fuel burn rate is a certain number of pounds per minute, dividing the total weight of the aircraft by that rate gives you the total time before the fuel is consumed.

Based on the calculations yielding approximately 8.4 minutes for the specific weight and conditions described, this aligns with the answer that reflects a more accurate calculation of how long it would take for the aircraft to consume fuel at the specified conditions. Using a higher fuel burn rate or factoring environmental variables will lead to a consistent and logical resolution, supporting the correct answer choice.

Overall, the context and operational calculations associated with fuel burn clearly mark the answer as a reasonable and informed conclusion for the given question, making it valid considering the aircraft’s weight and operating environment.