FAA Ground School Practice Test

What wind direction and speed are forecast for STL at 9000 ft?

1. 180 degrees true at 25 knots

2. 250 degrees true at 29 knots

3. 230 degrees true at 32 knots

4. 270 degrees true at 35 knots

The correct answer is: 230 degrees true at 32 knots

The correct answer indicates that the wind is forecasted from 230 degrees at a speed of 32 knots at an altitude of 9,000 feet in St. Louis (STL). This means that the wind is blowing towards the east-southeast, providing specific information that pilots can use for flight planning and navigation. Wind direction is expressed in degrees, representing the direction from which the wind is coming. A wind direction of 230 degrees means it is originating from the southwest, which can significantly influence the aircraft's performance during takeoff, landing, and maneuvering, especially at low speeds. The wind speed of 32 knots is relevant for flight operations, as it can affect aircraft performance, including climb rates, descent rates, and fuel consumption. Stronger winds can also introduce turbulence, which pilots need to manage. Understanding the relationship between wind direction and speed helps pilots make informed decisions regarding their flight paths, especially when it comes to routing and managing crosswinds. The other choices represent different wind directions and speeds that would yield varying operational impacts compared to the selected answer. For instance, a wind coming from a different direction or at a different speed may provide less favorable conditions for specific flight operations in that area.