Commercial Pilot License (CPL) Practice Exam

In the event of an engine fire, managing cabin heat and air vents is crucial for ensuring the safety of the occupants. Closing the cabin heat and air vents is the correct approach because it helps prevent potentially toxic fumes or smoke from entering the cabin.

When there is an engine fire, the primary concern is to minimize the risks associated with fire and inhalation of harmful gases. By closing the vents, you effectively contain the situation within the engine compartment, attempting to keep the cabin environment as safe as possible.

Keeping vents closed minimizes the influx of fresh air that may also bring along smoke or toxic byproducts from the fire, allowing for a better chance to cope with the emergency until the situation can be mitigated or the aircraft can be safely landed.

Other options, like opening all vents or increasing ventilation, would contradict the need to protect those inside the aircraft from dangerous conditions created by an engine fire. Adjusting the cabin temperature to minimum could help with air circulation, but would not effectively prevent smoke and fumes from entering the cabin.