FAA 107 Commercial Drone Pilot Practice Exam

What factor might require a reduction in weight prior to flying a drone?

1. High humidity levels

2. Low battery charge

3. High density altitude conditions

4. Obstruction by other aircraft

The correct answer is: High density altitude conditions

High density altitude conditions significantly affect drone performance and can require a reduction in weight before flying. High density altitude occurs when temperatures are high and/or humidity is low, which decreases the density of air. This lower air density reduces the lifting capability of the drone's propellers, meaning the drone will struggle to achieve the same level of performance and efficiency as it would at lower altitudes or in denser air. When operating in conditions of high density altitude, reducing the weight of the drone can help improve its lift-to-weight ratio, allowing for better performance and stability during flight. This adjustment ensures that the drone can maintain controlled and safe operation, particularly when taking off and when maneuvering. Other factors mentioned, such as high humidity levels and low battery charge, can impact drone performance but do not necessitate a reduction in weight in the way that high density altitude does. Similarly, obstruction by other aircraft does not relate to the drone's weight but rather to avoiding collisions in flight.