AFOQT Practice Test

What results from an incorrect combination of flight envelope parameters?

1. Increased fuel efficiency

2. A stall in which lift decreases

3. Successful landings

4. Sustained climb onto altitude

The correct answer is: A stall in which lift decreases

An incorrect combination of flight envelope parameters can indeed lead to a stall, which is a critical performance issue. In aviation, the flight envelope outlines the operational limits regarding speed, altitude, and load factor. When an aircraft operates outside this envelope, it may exceed the critical angle of attack, resulting in a loss of lift. During a stall, air can no longer flow smoothly over the wings, diminishing the airfoil's ability to create lift. Consequently, the aircraft may struggle to maintain altitude or control, leading to potentially dangerous situations if not addressed promptly. The other options do not accurately reflect the consequences of operating outside safe flight parameters. While increased fuel efficiency and successful landings typically suggest optimized operational practices, they do not occur as a result of incorrect flight envelope combinations. Similarly, sustaining a climb to altitude requires adherence to specific performance limits, and operating outside those limits would hinder rather than promote successful ascent.