Fire Science
Air normally consists of this percentage of oxygen
What is 21%?
This type of ignition occurs without any external heat or flame igniting the fuel.
What is autoignition?
In order to burn, liquid fuel fires must be in this state
What is incipient?
This is a rapid oxidization process, which is a gas-phase chemical reaction resulting in the evolution of light and heat in varying intensities
What is fire?
The energy that a moving object possesses
What is kinetic energy?
This type of energy is created when two surfaces rub together and create friction
Hydrogen is an example of this kind of fuel? (organic/inorganic)
What is inorganic?
This is the stage where a fire runs out of available fuel or oxygen
What is the decay stage?
Initiation of combustion by heat but without a spark or flame
What is autoignition?
The type of chemical reaction in which a substance absorbs energy is an
What is an endothermic reaction?
This method of heat transfer occurs when a fire transmits energy to an object via electromagnetic waves
What is radiation?
The term that describes the the extent to which a fuel substance will mix with water
What is solubility?
This stage occurs when the heat release rate of the fire has reached its peak
What is fully developed?
Measure of the average kinetic energy of the particles in a sample of matter, expressed in units or degrees designated on a standard scale
What is temperature?
Smoldering charcoal is an example of this type of combustion
What is nonflaming combustion?
This type of heat transfer occurs when energy is transferred by the circulation or movement of a liquid or gas
What is convection?
At the end of the growth stage, ventilation-limited fires tend to enter an early state of decay because there is no longer enough of _____ for the fire to become fully developed
What is oxygen?
A material that will maintain combustion under specific environmental conditions
What is fuel?
This term describes the measure of energy flowing to an area or object
What is heat flux?
The temperature at which a piloted ignition of sufficient vapors will begin a sustained combustion reaction
What is the fire point?
This occurs when an extinguishing agent interferes with the chemical chain reaction and stops combustion.
This is when a fire draws in air from around it
What is entrainment?
This is a chemical reaction in which a substance absorbs heat
What is an endothermic reaction?