An ionization type smoke detector is located in which area?

An ionization type smoke detector is located in which area?

• A. Cargo hold.
• B. Lavatory and electronics rack.
• C. Cockpit and avionics bay.
• D. Passenger cabin ceiling.

Answer: (B)

Ionization smoke detectors are very quick to respond to flaming fires that produce small smoke particles, and they work best in small, enclosed spaces or around electrical equipment. In an aircraft, this makes the lavatory and the electronics rack ideal locations: the lavatory is a compact, enclosed area where a fast-developing fire could be dangerous, and the electronics rack houses wiring and components that can ignite quickly from electrical faults. Placing an ionization detector there provides rapid warning of a fire in these high-risk, confined zones. Other areas may use different detector types to reduce false alarms from dust, humidity, or large-volume air flow, such as cargo holds or passenger cabins, where ionization detectors are less ideal. The cockpit and avionics bay often have detectors chosen to balance sensitivity with the risk of nuisance alarms, but the specific ionization type shown here is most appropriate for lavatories and electronics racks.

Ionization smoke detectors are very quick to respond to flaming fires that produce small smoke particles, and they work best in small, enclosed spaces or around electrical equipment. In an aircraft, this makes the lavatory and the electronics rack ideal locations: the lavatory is a compact, enclosed area where a fast-developing fire could be dangerous, and the electronics rack houses wiring and components that can ignite quickly from electrical faults. Placing an ionization detector there provides rapid warning of a fire in these high-risk, confined zones.

Other areas may use different detector types to reduce false alarms from dust, humidity, or large-volume air flow, such as cargo holds or passenger cabins, where ionization detectors are less ideal. The cockpit and avionics bay often have detectors chosen to balance sensitivity with the risk of nuisance alarms, but the specific ionization type shown here is most appropriate for lavatories and electronics racks.