FREE FAA-107 Effects of Weather on sUAS Performance Questions and Answers

Question 1

What effect does high density altitude have on the performance of a small unmanned aircraft?

Accepted Answer

Performance is decreased due to reduced propeller efficiency.

Answer

High density altitude means the air is less dense. This reduces propeller efficiency, decreases lift, and diminishes engine power output, all of which lead to reduced overall performance.

Question 2

Which combination of conditions would lead to the highest density altitude?

Accepted Answer

High altitude, high temperature, and high humidity.

Answer

Density altitude increases with higher elevation, higher temperatures, and higher humidity. Therefore, a hot, humid day at a high-elevation airport will produce the highest density altitude and the worst aircraft performance.

Question 3

What are the characteristics of a stable air mass?

Accepted Answer

Smooth air, poor visibility, and stratiform clouds.

Answer

In a stable air mass, vertical air movement is resisted. This results in smooth air, poor visibility due to trapped haze and pollutants, and stratiform clouds with steady, continuous precipitation.

Question 4

A temperature inversion can create a hazard for sUAS operations primarily because it can lead to:

Accepted Answer

Significant wind shear and poor visibility.

Answer

A temperature inversion creates a very stable layer of air that can trap smoke, dust, and other pollutants, leading to very poor visibility. It can also be a source of significant low-level wind shear.

Question 5

When flying an sUAS, structural icing is most likely to form when:

Accepted Answer

Flying through visible moisture at temperatures at or below freezing.

Answer

For structural ice to form, two conditions must be met: the aircraft must be flying through visible moisture (like clouds or freezing rain), and the temperature of the aircraft surface must be at or below freezing (0°C).

FAA - Part 107 Test Practice Test

FAA - Part 107 Test Practice Test

FREE FAA-107 Effects of Weather on sUAS Performance Questions and Answers