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

What is the maximum altitude at which flaps can be used?

1. 15,000 feet

2. 20,000 feet

3. 25,000 feet

4. 30,000 feet

The correct answer is: 20,000 feet

The maximum altitude at which flaps can be used is determined by specific aircraft operating limitations and is typically found in the pilot's handbook or flight manual for a particular aircraft type. In many cases, an altitude of 20,000 feet is common for various general aviation aircraft. This altitude helps ensure that the aerodynamic conditions are suitable for the energy used in extending and retracting flaps, as well as for maintaining optimal aircraft performance during approach and landing configurations. Using flaps at altitudes higher than recommend can lead to inefficient aircraft performance and increased risks, as the handling characteristics of the aircraft can change significantly. Thus, establishing the maximum altitude for flap extension is important for safe operation and is generally maintained around 20,000 feet in many aircraft models. The other altitude options tend to be either above or below the generally accepted limits for flap usage.