Which control is used to address carburetor icing?

Which control is used to address carburetor icing?

• A. Turn off the engine to prevent icing.
• B. Apply carburetor heat and consult the Engine section for guidance.
• C. Descend to the lower altitude immediately.
• D. Switch to alternate fuel.

Answer: (B)

Carburetor icing happens when moist air flowing through the carburetor cools and ice can form in the venturi, narrowing the throat and reducing engine performance. The way to address this is to use carburetor heat. Turning on carburetor heat sends heated air from around the exhaust into the carburetor, melting any ice and preventing more from forming. When you apply carburetor heat, you’ll often notice a brief drop in RPM and a momentary change in engine feel as the ice melts and the mixture changes; once the ice clears, the engine should run more smoothly and power should return. The POH advises consulting the Engine section for specific steps, limits, and any follow-up actions after applying carburetor heat. The other options don’t fix the issue: turning off the engine isn’t a remedy for icing, descending isn’t a control to address carb ice directly, and switching to alternate fuel doesn’t solve icing in the carburetor.

Carburetor icing happens when moist air flowing through the carburetor cools and ice can form in the venturi, narrowing the throat and reducing engine performance. The way to address this is to use carburetor heat. Turning on carburetor heat sends heated air from around the exhaust into the carburetor, melting any ice and preventing more from forming. When you apply carburetor heat, you’ll often notice a brief drop in RPM and a momentary change in engine feel as the ice melts and the mixture changes; once the ice clears, the engine should run more smoothly and power should return. The POH advises consulting the Engine section for specific steps, limits, and any follow-up actions after applying carburetor heat. The other options don’t fix the issue: turning off the engine isn’t a remedy for icing, descending isn’t a control to address carb ice directly, and switching to alternate fuel doesn’t solve icing in the carburetor.