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  • fracture

    A break or rupture in a bone.

  • Free Radical

    Atom or group of atoms that has at least one unpaired electron and is therefore unstable and highly reactive

  • Free Radical

    Atom or group of atoms that has at least one unpaired electron and is therefore unstable and highly reactive

  • Freelancing

    dangerous situation at an incident where an individual carries out tasks alone or without being assigned; violation of Personnel accountability procedures.

  • frequency

    The number of cycles per second of a radio channel, inversely related to wave length.

  • frequency modulation (FM)

    A method of converting an analog signal (e.g., an ECG) into a tone of varying pitch, which can then be transmitted over radio frequencies.

  • frequency spectrum

    The range of radio frequencies.

  • Friction loss

    Reduction of flow in a firehose caused by friction between the water and the lining of the hose. Depends primarily upon diameter, type and length of hose, and amount of water (GPM) flowing through.

  • Friction Loss

    Loss of pressure created by the turbulence of water moving against the interior walls of the hose or pipe.

  • Front Bumper Well

    Hose or tool compartment built into the front bumper of a fire apparatus.

  • Front-Mount Pump

    Fire pump mounted in front of the radiator of a vehicle and powered off the crankshaft.

  • Frontage

    The size of a building facing a street.

  • frontal

    Pertaining to the anterior surface of the body; front.

  • frontal bone

    The large, flat bone that forms the front of the skull.

  • frontal lobe

    The front portion of the brain.

  • frostbite

    The localized damage to tissues resulting from prolonged exposure to extreme cold.

  • Fuel Load

    Amount of fuel present expressed quantitatively in terms of weight per unit area

  • Fuel Load

    Amount of fuel present expressed quantitatively in terms of weight per unit area

  • Fuel load

    the mass of combustible materials available for a fire usually expressed as weight of fuel per unit area (e.g., 20 tons per acre).

  • Fuel moisture

    Percent water content of vegetation, an important factor in rate of spread, ranging from dead-fuel and fine-fuel moisture (FFM), of 10 percent or less, to live-fuel moisture (LFM), of 60 percent or more. FFM can be estimated by weighing calibrated Read on! →

  • Fuel type

    An identifiable association of fuel elements of distinctive species, form, size, arrangement, or other characteristics that will cause a predictable rate of spread or resistance to control under specified weather conditions.

  • Fuelbreak

    A natural or manmade change in fuel characteristics which affects fire behavior so that fires burning into them can be more readily controlled.

  • Fully involved

    Term of size-up meaning fire, heat and smoke in a structure are so widespread that internal access must wait until fire streams can be applied.

  • furosemide

    A potent diuretic drug used in the treatment of congestive heart failure (trade name

  • fused joint

    A joining of bones to form a rigid structure, such as in the skull.

  • Fusible Link

    Connecting link device that fuses or melts when exposed to heat; used in sprinklers, fire doors, dampers, and ventilators

  • Fusible Link

    Connecting link device that fuses or melts when exposed to heat; used in sprinklers, fire doors, dampers, and ventilators