FAA Part 107 Drone Practice Test

What characterizes standing lenticular altocumulus clouds?

1. They show significant movement

2. They have smooth, polished edges

3. They indicate light turbulence

4. They form primarily during winter

The correct answer is: They have smooth, polished edges

Standing lenticular altocumulus clouds are characterized by their smooth, polished edges, which result from the way air flows over a mountain ridge or other topographic feature. As moist air is forced upwards, it cools and condenses to form these clouds, often resembling a lens shape. This smooth appearance is a direct indicator of the laminar flow of air, contrasting with other cloud types that exhibit a more ragged or chaotic structure. The combination of the smooth edges and their formation associated with stable atmospheric conditions highlights their unique nature in the cloud classification system. While these clouds can indicate the presence of turbulence in the air, especially in the mountains where they form, the polished edges remain their defining characteristic. Therefore, understanding the visual features of standing lenticular clouds is essential for assessing atmospheric conditions and potential flight safety for drone operations.