aircraft systemsFAA-published question bank (Private Pilot, 2008)
With regard to carburetor ice, float-type carburetor systems in comparison to fuel injection systems are generally considered to be
A
more susceptible to icing.✓ Correct Answer
B
equally susceptible to icing.
C
susceptible to icing only when visible moisture is present.
Explanation
In a float-type carburetor, fuel vaporization and the pressure drop in the venturi cool the air sharply, which can form ice even in clear air; PHAK notes that fuel-injection systems have no venturi and are generally far less susceptible to induction icing. Visible moisture is not required for carburetor ice.
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