Ch 2 Enhanced Fire Behavior Flashcards
Firefighters knowledge of fire behavior serves as a foundation for understanding the ____,___,And ___ ___ requires in firefighting operations.
Strategies, tactics, and specific task assignments
Developing expertise in the application of this knowledge requires an understanding of the ____ and ___
Science of fire dynamics and practical fireground experience
-an exothermic chemical reaction that is a self-sustaining process of rapid oxidation of a fuel that produces heat and light
Combustion
Heat, fuel, and oxygen are all required for this ___ reaction to occur
Chemical
_____ is a simple model that explains non flaming or surface combustion (smoldering)
Fire triangle
Flaming combustion is more accurately explained using the model
Fire tetrahedron
Heat is a form of energy and exists in two states
Potential and kinetic
-stored energy possessed by an object that can be released in the future to perform work
Potential energy
-the energy possessed by a moving object
Kinetic energy
Energy is the capacity to perform
Work
___ occurs and ____ is expended when a force is applied to an object over a distance
Work ,energy
In the case of ___ work means increasing temperature, causing the average level of kinetic energy within a molecule of a substance to ____
Heat , increase
___ are the unit of measure for heat energy
Joules
While a joule is defined as being equal to ___ newton over a distance of one meter, in fire you should think of it as heat
One
It takes ___ joules to raise the temp of one kilogram of water one degree C
4186 joules
___BTU is the amount of heat required to raise the temperature of one pound of water one degree F
1 BTU
1 BTU equals approximately __ joules
1100 joules
___ is the energy component of the fire tetrahedron
Heat
Applying additional heat causes ___ (the chemical decomposition of a substance through the action of heat) in solid fuels and ___ is liquid fuels
Pg.23
Pyrolysis
Vaporization
There are two forms of ignition - ____ and ____
Piloted ignition and auto ignition
Piloted ignition occurs when a mixture of fuel and oxygen encounters an ___ ___ with sufficient heat entertainment to start the ____ reaction.
Ignition source
Combustion
The characteristics of the compartment in which a fire is burning can also affect the ___ ___ ___
Heat release rate
In general there are two mechanisms that can induce flashover - ____ and ____
Radiation and ventilation
P.47
