What are some indications of carburetor icing?

Loss of power and rough engine operation are classic indications of carburetor icing. When moisture in the air freezes in the carburetor, it can restrict the flow of air and fuel. This disruption leads to a decrease in engine performance, resulting in rough operation as the engine struggles to get the right mixture. Additionally, the reduction in airflow affects combustion, causing a noticeable loss of power. Pilots should be vigilant for these signs, particularly when flying in conditions that favor icing, such as during humid weather or at temperatures between 20°F and 70°F.

Other options do not accurately represent the typical signs of carburetor icing. Excessive fuel consumption might be a result of other mechanical issues rather than icing. Increased climb rates would indicate that the engine is performing well, which is contrary to the effects of icing. Smooth engine performance suggests that everything is functioning properly, which would not be the case if icing were occurring. Thus, understanding the specific symptoms associated with carburetor icing is crucial for pilots in order to maintain safe flight operations.