aircraft systemsFAA-published sample question (AGI, Aug 2021)
Carburetor ice
A
occurs mostly as a function of temperature.
B
can only form when the outside air temperature is near freezing with high relative humidity.
C
is more likely to form when outside air temperatures are below 70°F and relative humidity is above 80%.✓ Correct Answer
Explanation
PHAK Chapter 7 says carburetor ice is likely when outside air temperatures are below about 70 degrees F and relative humidity is above 80 percent, because fuel vaporization and venturi cooling can drop the intake air below freezing. It is not only a function of temperature and can form well above freezing.
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