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Special Hazard Suppression 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.

Read the first 7 Special Hazard Suppression flashcards as text

  1. Which NFPA standard governs fixed dry chemical fire extinguishing systems?

    Answer: NFPA 17

    NFPA 17 covers dry chemical extinguishing systems, including fixed piped systems and local application systems protecting industrial and commercial hazards.

  2. Wet chemical extinguishing systems installed in commercial cooking hoods must comply with:

    Answer: NFPA 17A (wet chemical standard)

    NFPA 17A specifically covers wet chemical extinguishing systems for commercial cooking equipment, while NFPA 96 covers the overall ventilation and fire protection requirements for cooking operations.

  3. Potassium bicarbonate (Purple-K) dry chemical extinguishes fires primarily through:

    Answer: Chain reaction interruption (chemical flame inhibition)

    Purple-K is highly effective on Class B fires because potassium ions chemically interfere with the free-radical chain reaction sustaining the flame.

  4. In commercial kitchen wet chemical systems, the agent suppresses grease fires partly through a process called saponification, which involves:

    Answer: Reacting with cooking oils to form a soapy foam that seals and cools the grease surface

    Saponification is the alkaline wet chemical agent reacting with hot cooking oils to form a soapy layer that seals the grease surface and provides lasting re-ignition resistance.

  5. Fixed dry chemical systems are generally NOT recommended for areas containing:

    Answer: Delicate electronic equipment and sensitive instrumentation

    Dry chemical agents are corrosive, abrasive, and difficult to clean up, making them unsuitable for environments with sensitive electronics or precision equipment where agent residue causes damage.

  6. The maximum ambient storage temperature typically specified for standard dry chemical agent cylinders is:

    Answer: 150°F (66°C)

    Manufacturer and NFPA 17 requirements typically limit dry chemical storage to a maximum of 150°F (66°C) to prevent pressure buildup and agent caking.

  7. Multipurpose ABC dry chemical extinguishing agent contains which primary active ingredient?

    Answer: Monoammonium phosphate

    Monoammonium phosphate is the active ingredient in ABC dry chemical; it melts at fire temperatures and coats Class A fuels, making it effective on ordinary combustibles as well as flammable liquids and electrical fires.