weather theoryFAA-published question bank (Private Pilot, 2008)
A nonfrontal, narrow band of active thunderstorms that often develop ahead of a cold front is a known as a
A
prefrontal system.
B
squall line.✓ Correct Answer
C
dry line.
Explanation
PHAK Chapter 12 defines a squall line as a narrow band of active thunderstorms that often develops ahead of a cold front in moist, unstable air. A dry line is a boundary between moist and dry air masses, and 'prefrontal system' is not the standard term.
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