FAA 107 Commercial Drone Pilot Practice Exam

During which time is the operation of small UAS prohibited?

1. Between morning civil twilight and sunset

2. Between the end of evening civil twilight and the beginning of morning civil twilight

3. During heavy weather conditions

4. At any time when visibility is impaired

The correct answer is: Between the end of evening civil twilight and the beginning of morning civil twilight

The operation of small UAS (Unmanned Aircraft Systems) is prohibited between the end of evening civil twilight and the beginning of morning civil twilight. This timeframe is significant because civil twilight is defined as the period when the sun is just below the horizon and there is enough natural light for most outdoor activities. Flying a drone during this prohibited period poses risks, as visibility is significantly reduced and pilots may not be able to maintain visual line of sight, which is a critical requirement for safe UAS operations. Furthermore, flying during this time can hinder the pilot's ability to see potential obstacles, which could lead to accidents. The rules set forth by the FAA prioritize safety, and this prohibition reflects their commitment to ensuring that drones are flown during times when pilots can adequately see and react to their surroundings.