Commercial Pilot Airplane (CAX) Performance Practice Exam 2025 - Free CAX Performance Practice Questions and Study Guide

To determine the fuel required for an aircraft weighing 3,400 lb at an airport pressure altitude of 6,000 ft, it’s essential to understand the principles of weight, altitude, and fuel consumption. In aviation performance calculations, fuel required is often estimated based on the weight of the aircraft and specific consumption rates, which can vary with altitude and operating conditions.

At higher altitudes, the air density decreases, which can affect engine performance and fuel efficiency. The calculations typically involve a ratio that takes into account the weight and altitude. For a weight of 3,400 lb at a pressure altitude of 6,000 ft, a calculated requirement of 43 pounds of fuel reflects a balance of the aircraft's operating efficiency at that altitude, ensuring that there is enough fuel for the necessary performance while adhering to safety standards.

This fuel calculation likely aligns with specific performance tables or charts available for the aircraft in question, factoring in typical rates of fuel consumption based on the aircraft's specifications, weather conditions, and engine performance characteristics. The selection of 43 pounds indicates a calculation based on these performance metrics tailored for the given weight and pressure altitude scenario, making it the most suitable answer.