Practice Test Geeks(FSD) Fire and Smoke Damper Certification Practice Test
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HVAC Systems & Airflow Control Flashcards

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

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  1. Which NFPA standard governs the installation of fire dampers in HVAC duct systems?

    Answer: NFPA 90A

    NFPA 90A, Standard for the Installation of Air-Conditioning and Ventilating Systems, governs fire damper installation in HVAC ductwork.

  2. A combination fire/smoke damper must comply with which UL standard?

    Answer: Both UL 555 and UL 555S

    Combination fire/smoke dampers must comply with both UL 555 (fire dampers) and UL 555S (smoke dampers) since they perform both functions.

  3. What is the primary purpose of an actuator on a motorized smoke damper?

    Answer: Open or close the damper blades upon receiving a control signal

    The actuator is the electromechanical device that physically positions the damper blades open or closed in response to a control signal from the fire alarm or building automation system.

  4. In a variable air volume (VAV) HVAC system, why is damper leakage rating especially important?

    Answer: Leakage affects the accuracy of zone temperature control and can compromise smoke containment

    In VAV systems, damper leakage affects zone temperature accuracy and, critically, can allow smoke migration past a closed smoke damper during an emergency.

  5. A fire damper installed in a rated floor-ceiling assembly must achieve which minimum fire-resistance rating when the assembly is rated at 2 hours?

    Answer: 2 hours

    Fire dampers must have a fire-resistance rating at least equal to the rating of the assembly in which they are installed; a 2-hour assembly requires a 2-hour damper.

  6. What does the term 'dynamic closure' mean for a smoke damper?

    Answer: The damper is rated to close against moving airflow without the system being de-energized first

    Dynamic-rated smoke dampers (Class II) are tested and listed to close reliably against airflow while the fan is still running, unlike static-only dampers that require fan shutdown first.

  7. Which component in a fire damper provides the thermal trigger that causes the damper to close?

    Answer: Fusible link

    The fusible link is a heat-sensitive element that melts at a rated temperature (typically 165°F), releasing the damper blades to close under spring tension.