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Home > Exam Questions > Exam BPL Gas - Balloon Pilot License > Meteorology > What process results in the formation of "orographic fog" ("hill fog")?

266 - Gas Balloon Pilot Exam BPL - What process results in the formation of "orographic fog" ("hill fog")?

Question 266 - Meteorology - Exam BPL Gas - Balloon Pilot License

Prolonged radiation during nights clear of clouds

Warm, moist air is moved across a hill or a mountain range

Evaporation from warm, moist ground area into very cold air

Cold, moist air mixes with warm, moist air

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