FAA 107 Weather Effects & Flight Planning 2 — Questions and Answers
Question 1: What weather phenomenon is indicated by a rapidly falling barometric pressure?
- Improving weather conditions
- Approaching storm system (Correct answer)
- High pressure ridge
- Stable air mass
Correct answer: Approaching storm system
A rapidly falling barometric pressure indicates an approaching storm system with deteriorating weather conditions.
Question 2: Which type of fog forms when warm, moist air moves over a cooler surface?
- Radiation fog
- Advection fog (Correct answer)
- Upslope fog
- Freezing fog
Correct answer: Advection fog
Advection fog forms when warm, moist air moves horizontally over a cooler surface, causing the air to cool to its dew point.
Question 3: A drone pilot notices the wind is gusty and variable. What is the primary flight concern?
- Increased battery drain only
- Difficulty maintaining stable position and altitude (Correct answer)
- Improved GPS accuracy
- Reduced motor noise
Correct answer: Difficulty maintaining stable position and altitude
Gusty and variable winds make it difficult for the drone to maintain stable position and altitude, increasing crash risk.
Question 4: What does a SIGMET (Significant Meteorological Information) advise drone pilots about?
- Routine weather updates for flight planning
- Hazardous weather conditions significant to all aircraft (Correct answer)
- Local wind speed forecasts
- Temporary flight restriction locations
Correct answer: Hazardous weather conditions significant to all aircraft
A SIGMET advises of hazardous weather conditions considered significant to all aircraft, including severe turbulence, icing, and volcanic ash.
Question 5: How does high humidity affect drone battery performance?
- Significantly increases battery capacity
- Has no measurable effect
- Can reduce battery efficiency and increase risk of moisture damage (Correct answer)
- Always doubles flight time
Correct answer: Can reduce battery efficiency and increase risk of moisture damage
High humidity can reduce battery efficiency and may cause moisture damage to electronics, shortening flight time and risking equipment failure.
Question 6: What is the definition of 'dew point' and why is it important for drone operations?
- The temperature at which air becomes saturated and condensation occurs, indicating fog or icing risk (Correct answer)
- The maximum altitude where dew forms on the drone
- The minimum safe operating temperature
- The point where battery charging must stop
Correct answer: The temperature at which air becomes saturated and condensation occurs, indicating fog or icing risk
Dew point is the temperature at which air becomes saturated and condensation forms, which helps pilots assess risk of fog, low visibility, and icing.
Question 7: A drone pilot plans a flight at sunrise. Which weather hazard is most likely?
- Severe thunderstorms
- Radiation fog or low visibility (Correct answer)
- Extreme heat turbulence
- High altitude winds
Correct answer: Radiation fog or low visibility
Radiation fog commonly forms overnight and is most dense at sunrise before solar heating dissipates it, creating low visibility hazards.
FAA 107 Weather Effects & Flight Planning 2
What weather phenomenon is indicated by a rapidly falling barometric pressure?