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Water Supply and Fire Suppression Flashcards

6 cards from real F80 practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 6 Water Supply and Fire Suppression flashcards as text

  1. According to NFPA 291 color coding, what color bonnet indicates a fire hydrant with a flow capacity of 1,500 GPM or greater?

    Answer: Blue

    NFPA 291 recommends blue bonnets for hydrants capable of delivering 1,500 GPM or more at 20 psi residual pressure.

  2. Which type of sprinkler head activates only at the individual head directly exposed to sufficient heat?

    Answer: Closed-head sprinkler with a fusible link or glass bulb

    Closed-head sprinklers activate individually only when their fusible link or glass bulb is exposed to enough heat, limiting water discharge to the fire area.

  3. What does residual pressure measure during a fire hydrant flow test?

    Answer: Pressure remaining in the water distribution system while water is actively flowing

    Residual pressure is the pressure remaining in the water supply system while water is flowing at the test hydrant, indicating available supply during firefighting operations.

  4. What is the primary function of a Post Indicator Valve (PIV)?

    Answer: To provide a visible open/shut indication of a water control valve without entering the building

    A Post Indicator Valve shows 'OPEN' or 'SHUT' through a window in the post, allowing personnel to verify valve status from outside the building.

  5. What extinguishing agent is used in Class D fire extinguishers for combustible metal fires?

    Answer: Specialized dry powder formulated for the specific metal involved

    Class D extinguishers use dry powder agents specifically formulated for the combustible metal involved, such as sodium chloride for magnesium or graphite-based powder for sodium.

  6. What is the purpose of a fire department connection (FDC) on a building?

    Answer: To allow fire department pumpers to supplement water supply to the building's sprinkler or standpipe system

    The FDC (often called a Siamese connection) allows fire department pumpers to inject water into a building's suppression system to supplement or replace the municipal supply.