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. In a duct smoke detector installation, where should the sampling tube inlet be positioned relative to airflow?

    Answer: Downstream of filters and coils, upstream of branch takeoffs

    Sampling tubes should be positioned downstream of filters and coils but upstream of branch takeoffs to sample representative air without filter interference.

  2. Which NFPA 72 category requires smoke detectors to be tested using 'canned smoke' or a listed aerosol during acceptance testing?

    Answer: Operational test using a listed test method

    NFPA 72 requires an operational test using a listed smoke entry test method (such as canned smoke) during acceptance to verify detector response.

  3. What is the PRIMARY purpose of a smoke detector's 'alarm verification' feature?

    Answer: To introduce a time delay before transmitting an alarm to reduce false alarms

    Alarm verification introduces a programmed delay and re-sampling period before an alarm is transmitted, reducing false alarms from transient conditions.

  4. According to NFPA 72, how often must the sensitivity of system smoke detectors be tested after the first required test?

    Answer: Every 2 years or per manufacturer recommendation

    NFPA 72 requires sensitivity testing within one year of installation and then at intervals not exceeding two years or per manufacturer recommendations.

  5. A smoke detector installed on a pitched ceiling with a slope greater than 1 foot in 8 feet should be placed how far from the peak?

    Answer: Within 36 inches of the peak

    NFPA 72 requires that on sloped ceilings steeper than 1:8, detectors be located within 36 inches of the peak measured horizontally, where hot gases accumulate.

  6. Which type of smoke detector would BEST minimize false alarms in a newly constructed building before finishing work is complete?

    Answer: Construction-mode detector with reduced sensitivity

    Construction-mode detectors or detectors with adjustable sensitivity can be set to a reduced threshold to prevent false alarms from dust and debris during construction.

  7. What is the listed maximum air velocity within a duct for which a duct smoke detector is typically rated to operate reliably?

    Answer: 4,000 FPM

    Most listed duct smoke detectors are rated for duct air velocities up to 4,000 feet per minute (FPM), though manufacturers may list specific ranges.