USCG FIRE FIGHTING LATEST STUDY EXAMS GUIDED
QUESTIONS AND ANSWERS SURE A+
✔✔flashover - ✔✔rapid transition from the growth stage to the fully developed stage,
where everything is engulfed in flames
✔✔backdraft - ✔✔sudden explosive ignition of fire gases when oxygen is introduced
into a superheated space previously deprived of oxygen
✔✔signs/prevention of a backdraft - ✔✔confined fire, pressurized smoke, smoke-
stained windows, yellowish smoke / ventilate at high level
✔✔pyrolysis - ✔✔the thermal decomposition of solid organic matter by heat
✔✔phases of a fire - ✔✔Ignition, incipient, growth, fully developed, decay
✔✔ignition phase - ✔✔phase of fire development in which the fire is limited to the
immediate point of origin
✔✔incipient phase - ✔✔first stage of the burning process where the substance being
oxidized is producing some heat, but the heat has not spread to other substances
nearby
, ✔✔growth phase - ✔✔phase of fire development in which the fire is spreading beyond
the point of origin and beginning to involve other fuels in the immediate area
✔✔fully developed phase - ✔✔phase of fire development in which the fire is free-
burning and consuming much of the fuel
✔✔decay phase - ✔✔phase of fire development in which the fire has consumed either
the available fuel or oxygen and is starting to die down
✔✔Classes of Fires - ✔✔A, B, C, D, K
✔✔Class A Fire - ✔✔Common Combustibles such as paper, wood, furniture, clothing
(Water, Class A Foam, Cry Chem)
✔✔Class B Fire - ✔✔flammable and combustible liquids like gas and oil (remove/shut
off fuel supply, use class B foam, CO2)
✔✔Class C Fire - ✔✔energized electrical equipment (nonconductive agents)
✔✔Class D Fire - ✔✔Special Fires, such as chemical, metals like
magnesium/sodium/titanium - (Dry powder)
✔✔Class K Fire - ✔✔Commercial Kitchens, cooking oils and fats - (Wet Chemical
hoods)
✔✔types of foam - ✔✔protein, fluoroprotein, AFFF, FFFP (film forming fluoro protein),
AR (alcohol-resistant) foam
✔✔water content of foam - ✔✔94-97% water
✔✔foam concentrate content of foam - ✔✔3% foam concentrate
✔✔Foam tetrahedron - ✔✔foam concentrate, water, air, aeration
✔✔what is foam effective on? - ✔✔suppressing vapors, extinguishing
hydrocarbons(3%) and polar solvents (6%)
✔✔what is foam not effective on? - ✔✔class c electrical fires, 3D fires (moving, oil spill),
pressurized gases (propane), combustible metals
✔✔class A foam - ✔✔effective on class A fires, mixed in proportions of 1% or less
✔✔how does class A foam work? - ✔✔cool surface, decrease surface tension of water
QUESTIONS AND ANSWERS SURE A+
✔✔flashover - ✔✔rapid transition from the growth stage to the fully developed stage,
where everything is engulfed in flames
✔✔backdraft - ✔✔sudden explosive ignition of fire gases when oxygen is introduced
into a superheated space previously deprived of oxygen
✔✔signs/prevention of a backdraft - ✔✔confined fire, pressurized smoke, smoke-
stained windows, yellowish smoke / ventilate at high level
✔✔pyrolysis - ✔✔the thermal decomposition of solid organic matter by heat
✔✔phases of a fire - ✔✔Ignition, incipient, growth, fully developed, decay
✔✔ignition phase - ✔✔phase of fire development in which the fire is limited to the
immediate point of origin
✔✔incipient phase - ✔✔first stage of the burning process where the substance being
oxidized is producing some heat, but the heat has not spread to other substances
nearby
, ✔✔growth phase - ✔✔phase of fire development in which the fire is spreading beyond
the point of origin and beginning to involve other fuels in the immediate area
✔✔fully developed phase - ✔✔phase of fire development in which the fire is free-
burning and consuming much of the fuel
✔✔decay phase - ✔✔phase of fire development in which the fire has consumed either
the available fuel or oxygen and is starting to die down
✔✔Classes of Fires - ✔✔A, B, C, D, K
✔✔Class A Fire - ✔✔Common Combustibles such as paper, wood, furniture, clothing
(Water, Class A Foam, Cry Chem)
✔✔Class B Fire - ✔✔flammable and combustible liquids like gas and oil (remove/shut
off fuel supply, use class B foam, CO2)
✔✔Class C Fire - ✔✔energized electrical equipment (nonconductive agents)
✔✔Class D Fire - ✔✔Special Fires, such as chemical, metals like
magnesium/sodium/titanium - (Dry powder)
✔✔Class K Fire - ✔✔Commercial Kitchens, cooking oils and fats - (Wet Chemical
hoods)
✔✔types of foam - ✔✔protein, fluoroprotein, AFFF, FFFP (film forming fluoro protein),
AR (alcohol-resistant) foam
✔✔water content of foam - ✔✔94-97% water
✔✔foam concentrate content of foam - ✔✔3% foam concentrate
✔✔Foam tetrahedron - ✔✔foam concentrate, water, air, aeration
✔✔what is foam effective on? - ✔✔suppressing vapors, extinguishing
hydrocarbons(3%) and polar solvents (6%)
✔✔what is foam not effective on? - ✔✔class c electrical fires, 3D fires (moving, oil spill),
pressurized gases (propane), combustible metals
✔✔class A foam - ✔✔effective on class A fires, mixed in proportions of 1% or less
✔✔how does class A foam work? - ✔✔cool surface, decrease surface tension of water
