Certified Flight Instructor - Flight Instructor Airplane Practice Exam

What maximum elevation figure is needed to assure obstruction clearance during flight over certain areas?

1. 1,900 feet MSL.

2. 1,800 feet MSL.

3. 3,200 feet MSL.

4. 4,500 feet MSL.

The correct answer is: 3,200 feet MSL.

The correct response refers to the maximum elevation figure (MEF), which is the highest elevation that could be expected within a specific quadrangle of sectional charts, taking into account terrain and man-made obstacles. The MEF provides important information for pilots to ensure safe obstruction clearance during flight. In specific airspace, especially over mountainous or populated areas, pilots need to account for the highest potential obstacles, including both natural terrain and structures. An MEF of 3,200 feet Mean Sea Level (MSL) indicates that when flying over that area, the pilot can be assured there will be sufficient vertical clearance from obstacles and the ground. The elevation of 3,200 feet MSL provides a margin of safety for flying, considering variances in terrain and the presence of structures. When pilots reference the MEF, it serves as a guideline, ensuring that they maintain a safe altitude to avoid collisions with any obstacles, thus enhancing safety during the flight. Lower MEF values could indicate less clearance, which may not adequately ensure safety in areas where obstacles could reach close to the heights indicated. Therefore, the choice of 3,200 feet MSL as the required MEF is essential for maintaining safe operation in the airspace in question.