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Under which conditions is carburetor ice most likely to form?
Choices
Only in below-freezing outside air temperatures
Carburetor ice can form even when outside air is well above freezing.
✓ Warm, humid conditions with high moisture in the aircorrect
The venturi cooling can freeze moisture even on warm, humid days.
Only at high altitude in dry air
Dry air lacks the moisture needed to form carburetor ice.
Only during ground operations
Carburetor ice can form in flight, not just on the ground.
Why
Carburetor ice forms as vaporization and the venturi pressure drop cool the air; it is most likely in humid conditions and can occur even on warm days.
FAA source: PHAK Ch. 7browse the reference library →
Original study question written for this course — representative of FAA knowledge-test topics, not an actual current FAA exam question.