Which of the following is a location where an ionization type smoke detector is located?

• A. Cockpit.
• B. Cargo area.
• C. Lavatory and electronics rack.
• D. Bottom deck.

Answer: (C)

Ionization-type smoke detectors are chosen for areas where fast flame development needs to be detected quickly, especially in enclosed spaces with potential electrical fires. In aircraft, lavatories and electronics racks fit that need well: lavatories can generate smoke from various sources, and electronics racks contain equipment that can produce small, fast-moving flames or smoke particles. These detectors respond rapidly to such conditions, providing early warning.

That’s why the lavatory and electronics rack is the best location for an ionization-type detector. In contrast, cargo areas and other large or open spaces may rely on different detector types or configurations, and bottom-deck locations aren’t typical for this sensor style.