Fire detection in the forward cargo compartment is accomplished with how many detectors?

• A. Two smoke detectors
• B. Three smoke detectors
• C. Four smoke detectors
• D. One smoke detector

Answer: (B)

Redundancy and coverage in fire detection for a critical cargo area are essential. The forward cargo compartment is a sizable space with multiple potential ignition sources, so a single detector could miss smoke or fail to sense it quickly. Having three smoke detectors provides overlapping coverage so smoke in any zone of the compartment will trigger the alarm promptly, and it also ensures the system remains functional if one detector fails. This level of redundancy helps meet safety requirements for reliable fire detection. Fewer than three reduces protection and increases the risk of missed detection, while more than three isn’t typically necessary and can add complexity and potential for false alarms. So, three smoke detectors is the appropriate configuration.