Private Pilot Private Practice Exam

Question: 1 / 605

How can the presence of carburetor ice be verified in an aircraft equipped with a fixed-pitch propeller?

Applying carburetor heat and observing an increase in RPM

Applying carburetor heat and noticing a decrease in RPM followed by a gradual increase

The presence of carburetor ice can be verified by applying carburetor heat and noticing a decrease in RPM followed by a gradual increase. When carburetor ice forms, it restricts the airflow through the carburetor, leading to a reduction in engine power and RPM. When carburetor heat is applied, it introduces warmer air into the carburetor, helping to melt the ice. Initially, the engine may experience a decrease in RPM due to the disruption in airflow and the melting of the ice. However, once the ice is cleared and the airflow is restored, you will observe a gradual increase in RPM as the engine regains power.

This response demonstrates the correct sequence of events that indicates the existence of carburetor ice and illustrates the proper procedure to alleviate the situation. It is crucial for pilots to recognize these signs, as carburetor ice can significantly impact engine performance and safety.

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Checking fuel flow rate after applying heat

Listening for changes in engine noise

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