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Water-Based Suppression Systems Flashcards

7 cards from real CFPS 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. Per NFPA 13, what is the maximum allowable coverage area per sprinkler head in an Ordinary Hazard occupancy?

    Answer: 130 sq ft

    NFPA 13 limits Ordinary Hazard occupancy sprinkler coverage to 130 sq ft per head due to the higher fire potential compared to Light Hazard.

  2. What is the primary function of a water motor gong (mechanical alarm) on a wet pipe sprinkler system?

    Answer: Provide a local audible alarm driven by water flow through the alarm valve

    A water motor gong is driven by water flowing through a restricted orifice at the alarm valve, producing a loud local audible alarm without electricity.

  3. Which NFPA standard governs the installation of standpipe and hose systems?

    Answer: NFPA 14

    NFPA 14, Standard for the Installation of Standpipe and Hose Systems, covers design, installation, and maintenance requirements for these systems.

  4. Per NFPA 20, what performance criterion must a listed fire pump meet at churn (no-flow, shutoff) condition?

    Answer: Pressure must not exceed 140% of rated pressure

    NFPA 20 requires that a fire pump's pressure at churn (shutoff) shall not exceed 140% of its rated pressure to prevent overpressurizing the system.

  5. What substance fills the distribution piping between the dry pipe valve and the sprinkler heads in a dry pipe system under normal (standby) conditions?

    Answer: Pressurized air or nitrogen

    Dry pipe systems maintain pressurized air or nitrogen in the distribution piping to hold the dry pipe valve clapper closed until a sprinkler head opens.

  6. Which sprinkler system type is most appropriate for an unheated walk-in cold storage freezer room?

    Answer: Dry pipe system

    Dry pipe systems are used where piping may be subject to freezing because the distribution piping contains pressurized air, not water, during standby.

  7. Per NFPA 13, what is the minimum residual pressure required at the hydraulically most remote sprinkler during system discharge?

    Answer: 7 psi

    NFPA 13 requires a minimum of 7 psi at the most remote sprinkler to ensure adequate water distribution from the deflector.