weather theoryFAA-published question bank (Private Pilot, 2008)
What conditions are necessary for the formation of thunderstorms?
A
High humidity, lifting force, and unstable conditions.✓ Correct Answer
B
High humidity, high temperature, and cumulus clouds.
C
Lifting force, moist air, and extensive cloud cover.
Explanation
Thunderstorm formation requires sufficient moisture (high humidity), a lifting force and unstable air, per PHAK Chapter 12. High temperature, cumulus clouds or extensive cloud cover may accompany thunderstorms but are not the three required ingredients.
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