Under what condition are smoke detectors not allowed to be installed?

Study for the Louisiana Fire Alarm License Test. Get ready with flashcards, multiple choice questions, hints, and explanations. Enhance your exam preparation!

Smoke detectors are designed to operate effectively within specific environmental conditions to ensure their reliability and accuracy in detecting smoke. When air velocity exceeds 300 feet per minute, smoke can be dispersed too quickly for a smoke detector to recognize it as a threat. High air movement can lead to false negatives, where actual smoke presence goes undetected because the smoke is carried away from the sensor before it can activate.

This point makes it critical to ensure that smoke detectors are placed in environments where airflow is stable and does not interfere with their operation. The other conditions listed, while they may present challenges, do not compromise the detector's ability to function as severely as high air velocity does. For example, humidity levels above 50% or temperatures exceeding 100°F can affect the performance of smoke detectors, but they typically still function within operational tolerances. Similarly, areas with high dust concentration may still allow for detection, although it can increase the potential for false alarms.

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