E=MC2
This is the ability to do work.
What is energy?
The stage of fire development where the fire’s is limited to a fuel source and the fire is localized to the area of the burning material.
What is the inception stage?
The heat transfer to another body or within a body by direct contact.
What is conduction?
A fire that involves energized electrical equipment.
What is a Class C fire?
An explosion resulting from the sudden introduction of air into a confined space containing oxygen-deficient products of incomplete combustion.
What is a backdraft?
The airborne solid and liquid particulates and gases evolved when a material undergoes pyrolysis or combustion.
What is smoke?
The density of a liquid compared to water (which is 1.0).
What is specific gravity?
This is energy possessed by an object because of its motion.
What is kinetic energy?
The stage of fire development characterized by a decrease in the fuel load or available oxygen to support combustion.
What is the decay stage?
The heat transfer by circulation within a medium such as a gas or a liquid.
What is convection?
A fire in flammable liquids, combustible liquids, petroleum greases, tars, oils, and flammable gases.
What is a Class B fire?
The development of a compartment fire in which surfaces exposed to thermal radiation reach ignition temperature more or less simultaneously, resulting in total involvement of the room or enclosed space.
What is a flashover?
A toxic gas produced through incomplete combustion that attaches itself to hemoglobin in the blood.
What is carbon dioxide?
The temperature at which the vapor pressure of a liquid equals the surrounding atmospheric pressure.
What is the boiling point?
This is the form of energy stored by an object as a result of its position or condition.
What is potential energy?
The stage of fire where the heat release rate ihas increased to the point where heat transferred from the fire is pyrolyzing adjacent fuel sources and the fire begins to spread,
What is the growth stage?
The process by which thermal energy moves in the form of electromagnetic waves.
What is radiation?
A fire in ordinary combustible materials, such as wood, cloth, paper, rubber, and many plastics.
What is a Class A fire?
An explosion that occurs when pressurized liquefied gas in a closed container is exposed to a source of high heat, releasing the fuel which instantly vaporizes and ignites.
What is a (BLEVE) - boiling liquid/expanding vapor explosion.
An extremely toxic gas produced by the incomplete combustion of many common plastic-based materials.
What is hydrogen cyanide (HCN)?
A chemical reaction that absorbs heat.
What is endothermic?
This is energy produced by electromagnetic waves packaged in discrete bundles called photons.
What is light energy?
The stage of fire development where heat release rate has reached its peak.
What is fully developed?
A geometric shape used to depict the four components—fuel, oxygen, heat, and chemical chain reactions—required for a fire to occur.
What is a fire tetrahedron?
A fire in a cooking appliance that involves cooking vegetable or animal fats.
What is a K Class fire?
A violent release of energy that occurs when smoke travels away from its source to a void area or other area separate from the fire compartment and comes in contact with a source of ignition without any change to the ventilation profile.
What is a smoke explosion?
The movement of heat and smoke from the higher pressure within the fire area toward the lower pressure areas accessible via doors, window openings, and roof structures.
What is a flow path?
The lowest temperature at which a liquid will ignite and achieve sustained burning
What is fire point?
This is a measure of heat energy equal to 0.4 calories.
What is a joule?
A fire in which the heat release rate and fire growth are regulated by the available oxygen within the space.
What is a ventilation-limited fire?
The process in which solid material is decomposed by the effects of heat alone; often precedes combustion.
What is pyrolysis?
A fire involving magnesium, titanium, zirconium, sodium, lithium, or potassium.
What is a Class D fire?
The condition in which unburned fuel (smoke) has accumulated in the ceiling layer to a sufficient concentration that it ignites and burns.
What is rollover of flashover?
A doorway or a window opening, between the hot gas flowing out of a fire compartment and the cool air flowing in where the pressure difference between the interior and exterior is equal.
What is the neutral plane?
The range in concentration between the lower and upper flammable limits.
What is flammable range?