Which actions help isolate a fire to prevent smoke spread in the cabin?

• A. Open doors and increase ventilation
• B. Notify ground staff
• C. Close the affected compartment door, close air vents, and follow isolation steps per procedure
• D. Evacuate all passengers immediately

Answer: (C)

The action being tested is how to limit fire and smoke spread by controlling airflow and compartment integrity. The best approach is to close the affected compartment door, close air vents, and follow the isolation steps outlined in procedures. Closing the door creates a physical barrier that slows or stops the flames and keeps smoke from moving between areas. Turning off or closing air vents reduces the flow of air that can feed the fire and carries smoke through ducts, helping to keep other parts of the cabin clearer and giving crew a safer environment to manage the situation. Following the isolation steps ensures a standardized, effective response and minimizes the chance of uncontrolled spread.

Opening doors and boosting ventilation would actually help smoke and flames travel more easily through the cabin, worsening the situation. Notifying ground staff is important for support and coordination, but it does not by itself isolate the fire. Evacuating all passengers immediately is a critical step in certain scenarios, but doing so without first isolating the fire and stabilizing the cabin can create chaos and expose more people to smoke; isolation steps are the priority to contain the incident before initiating evacuation decisions.