Terms
What occurs when a mixture of unburned fuel gases and oxygen come in contact with an ignition source?
Smoke Explosion
What is the cause of most fire deaths?
Exposure to toxic gases found in smoke and/or lack of oxygen
What is the MOST common source of heat in combustion reactions?
A. Convective flow
B. Chemical Energy
C. Electrical Energy
B. Chemical energy
Carbon monoxide (CO)
Firefighters advancing a hoseline through and open door or ventilating windows to make entry into a building will establish new _____ between the fire compartment and exterior vents of the building.
Flow paths
Fires involve a heat-producing chemical reaction between fuel and:
In addition to structural members, what can be a significant factor influencing fire spread and loss of lives in fires?
Combustible interior finishes and furnishings
Pulsing smoke movement around small openings in the building is and indicator for potential:
Backdraft
When solid fuels are hearted, they begin to _____ and release fuel gases and vapors.
Pyrolize
What helps determine the flow path in a structure fire?
A. Stage of fire development
B. Nature and arrangement of the fuel
C. Floor plan and openings within the structure
C. Floor plan and openings within the structure
Any open space with no complete fire barrier dividing it is:
A compartment
Which type of buildings are subjected to rapid fire spread because many of the protective features such as gypsum wallboard and automatic fire suppression systems are not in place?
Buildings under construction
The volume of burning gases can increase to fill the room's entire volume and extend out of any opening from the room occurs during:
Flashover
This product of combustion targets the brain after being inhaled, ingested or absorbed into the body.
Hydrogen Cyanide (HCN)
The flow path of a structure fire is comprised of two regions: the ambient air flow in and the:
Hot exhaust flow out
What occurs when a mixture of fuel and oxygen encounter and external heat source with sufficient heat or thermal energy to start the combustion reaction?
Piloted ignition
Which means of influencing fire dynamics is typically a tactic in wildland fires or liquid and gas fires?
Fuel removal
Temperature
A. Fuel removal
B. Oxygen exclusion
C. Chemical flame inhibition
C. Chemical flame inhibition
A fire is said to be in the _____ stage when it runs out of either available fuel or available oxygen.
The minimum temperature at which a fuel in the air must be heated in order to start self-sustained combustion is known as the:
Autoignition temperature (AIT)
In a ventilation-limited compartment fire that has a large volume of flammable gases, opening a door or window could result in:
Backdraft
In a compartment fire, smoke flashover indicators include rapidly increasing volume, turbulence, optical density and:
A fuel's chemical content influences its heat release rate and its:
A. Physical attributes
B. Organic compounds
C. Heat of combustion
C. Heat of Combustion
The _____ stage of fire development occurs when the heat release rate of the fire has reached its peak.
Fully-developed