Practice Test Geeks(FST) Fire Safety Technician Certification Practice Test
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Smoke Detection Flashcards

7 cards from real FST practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Smoke Detection flashcards as text

  1. Which smoke detector type is MOST prone to false alarms from cooking steam and high humidity?

    Answer: Ionization

    Ionization detectors are more sensitive to small combustion particles and can be triggered by steam and high-humidity environments common near kitchens.

  2. What is the maximum spacing allowed between smoke detectors on a smooth ceiling under NFPA 72 when no other factors apply?

    Answer: 30 feet

    NFPA 72 specifies a maximum 30-foot spacing between smoke detectors on smooth ceilings under standard conditions.

  3. A Very Early Warning Fire Detection (VEWFD) system using air-sampling is BEST suited for which environment?

    Answer: Clean rooms and data centers

    Air-sampling VEWFD systems are ideal for clean rooms and data centers where extremely early detection is critical and the environment is controlled.

  4. Under NFPA 72, what is the required detector placement distance from a ceiling-mounted HVAC supply air diffuser?

    Answer: At least 36 inches

    NFPA 72 requires smoke detectors to be placed at least 36 inches from HVAC supply air diffusers to prevent airflow from diluting smoke and causing delayed detection.

  5. Which condition describes 'stratification' as it relates to smoke detection?

    Answer: Smoke rising and cooling before reaching ceiling detectors

    Stratification occurs when rising smoke cools and becomes neutrally buoyant before reaching ceiling-mounted detectors, preventing activation.

  6. A projected beam smoke detector is MOST effective for protecting which type of space?

    Answer: Large open areas with high ceilings like warehouses

    Projected beam smoke detectors are ideal for large open spaces with high ceilings because they cover long distances without requiring multiple point detectors.

  7. What does 'sensitivity drift' mean in the context of smoke detector maintenance?

    Answer: A gradual change in a detector's response threshold over time due to contamination

    Sensitivity drift refers to a gradual shift in a detector's alarm threshold caused by dust, debris, or aging components, requiring periodic testing and cleaning.