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Fire Detection & Alarm Systems Flashcards

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

Read the first 7 Fire Detection & Alarm Systems flashcards as text
  1. What is the primary purpose of a duct smoke detector installed in an HVAC air handling unit?

    Answer: To detect smoke in the airstream and shut down the air handling unit

    Duct smoke detectors sense smoke within the HVAC airstream and initiate shutdown of air handling equipment to prevent smoke from being recirculated or distributed throughout the building.

  2. Which of the following is classified as a notification appliance rather than an initiating device in a fire alarm system?

    Answer: Strobe light alarm device

    A strobe light is a notification appliance that alerts occupants after the alarm is initiated; it outputs a signal rather than detecting a fire condition.

  3. What is the primary operational advantage of an addressable fire alarm system over a conventional zoned system?

    Answer: Ability to pinpoint the exact device that initiated an alarm

    In addressable systems, each device has a unique address allowing the control panel to identify the exact location of the initiating device, rather than only identifying which zone activated.

  4. What does alarm verification in a fire alarm control panel accomplish?

    Answer: Delays retransmission by re-sampling the detector to reduce false alarms

    Alarm verification causes the FACP to wait and re-sample a smoke detector signal before sounding a full alarm, reducing nuisance alarms from transient non-fire conditions such as cooking vapors.

  5. A Digital Alarm Communicator Transmitter (DACT) in a fire alarm system transmits signals over which infrastructure?

    Answer: Public switched telephone network (PSTN)

    A DACT transmits encoded alarm signals over the public switched telephone network (PSTN) to a digital alarm communicator receiver at a monitoring station.

  6. Under NFPA 72, a Positive Alarm Sequence (PAS) allows what specific action before a full alarm is transmitted?

    Answer: An authorized person has up to 15 seconds to investigate and reset the detector

    Positive Alarm Sequence (PAS) permits an authorized person up to 15 seconds after initial detector activation to acknowledge and investigate before the system enters full alarm, helping reduce nuisance alarms.

  7. What is the function of the notification appliance circuit (NAC) in a fire alarm system?

    Answer: Provides power and supervision to audible and visual alarm devices

    The notification appliance circuit (NAC) supplies power and provides supervisory monitoring to audible and visual notification devices such as horns, speakers, and strobe lights.