Home › Part 107 Practice Tests › Aviation Weather Questions › Question 43
On a clear, calm night, cooling of the ground chills the air above it to the dew point and fog forms by morning. What type of fog is this?
- A.Advection fog
- B.Radiation fog
- C.Upslope fog
Correct answer
B. Radiation fog
Why
Radiation fog forms on clear nights with light wind when the surface loses heat and cools the adjacent air. It often burns off or lifts after sunrise as the ground warms.
Source: FAA-G-8082-22 Ch. 3 · ACS knowledge area: Aviation Weather Sources and Effects · From the Aviation Weather practice bank (WEA-043).