Definitions Quiz Strategy Flashcards
1
Q
- _________________— Fatal condition caused by severe oxygen deficiency and an excess of carbon monoxide and/or other gases in the blood.
A
- Asphyxiation
2
Q
- __________________________— Initiation of combustion by heat but without a spark or flame.
A
- Autoignition
3
Q
- _________________________ — The lowest temperature at which a combustible material ignites in air without a spark or flame.
A
- Autoignition temperature (AIT)
4
Q
- ________________________ — Instantaneous explosion or rapid burning of superheated gases that occurs when oxygen is introduced into an oxygen-depleted confined space. The stalled combustion resumes with explosive force; may occur because of inadequate or improper ventilation procedures.
A
- Backdraft
5
Q
- ______________________— The tendency or capacity of a liquid or gas to remain afloat or rise.
A
- Buoyant
6
Q
- ______________________— Fuels in which the energy of combustion derives principally from carbon; includes materials such as wood, cotton, coal, or petroleum.
A
- Carbon-Based Fuels
7
Q
- ______________________ — Colorless, odorless, heavier than air gas that neither supports combustion nor burns; used in portable fire extinguishers as an extinguishing agent to extinguish Class B or C fires by smothering or displacing the oxygen. CO2 aerobic metabolism.
A
- Carbon Dioxide (CO2)
8
Q
- ______________________ — Colorless, odorless, dangerous gas (both toxic and flammable) formed by the incomplete combustion of carbon. It combines with hemoglobin more than 200 times faster than oxygen does, decreasing the blood’s ability to carry oxygen.
A
- Carbon Monoxide (CO)
9
Q
- _____________— Horizontal movement of a layer of hot gases and combustion by-products from the center point of the plume, when a horizontal surface such as a ceiling redirects the vertical development of the rising plume.
A
- Ceiling Jet
10
Q
- _____________________ — Extinguishment of a fire by interruption of the chemical chain reaction.
A
- Chemical Flame Inhibition
11
Q
- __________________ — A chemical process of oxidation that occurs at a rate fast enough to produce heat and usually light in the form of either a glow or flame.
A
- Combustion
12
Q
- ________________________ — Area surrounding a heat source in which there is sufficient air available to feed a fire.
A
- Combustion Zone
13
Q
- __________________— The way in which the arrangement of compartments creates or does not create a series of barriers designed to keep flames, smoke, and heat from spreading from one room or floor to another.
A
- Compartmentation
14
Q
- __________________ — Physical flow or transfer of heat energy from one body to another, through direct contact or an intervening medium, from the point where the heat is produced to another location, or from a region of high temperature to a region of low temperature.
A
- Conduction
15
Q
- ___________________ — Transfer of heat by the movement of heated fluids or gases, usually in an upward direction.
A
- Convection
16
Q
- ____________________ — Chemical reaction in which a substance absorbs heat.
A
- Endothermic Reaction
17
Q
- ____________________ — Capacity to perform work; occurs when a force is applied to an object over a distance, or when a substance undergoes a chemical, biological, or physical transformation.
A
- Energy
18
Q
- ____________________ — To draw in and transport solid particles or gases by the flow of a fluid.
A
- Entrain
19
Q
- ____________________— The drawing in and transporting of solid particles or gases by the flow of a fluid.
A
- Entrainment
20
Q
- ___________________ — Chemical reaction between two or more materials that changes the materials and produces heat.
A
- Exothermic Reaction
21
Q
- ____________________ — A fire ignited in fuel packages or buildings that are remote from the initial fuel package or building of origin.
A
- Exposure Fire
22
Q
- ___________________ — A rapid oxidation process, which is a gas phase chemical reaction resulting in the evolution of light and heat in varying intensities.
A
- Fire
23
Q
- ___________________— Applying the tools of chemistry and physics to gain a technical understanding of how fires ignite, grow, and spread.
A
- Fire Dynamics
24
Q
- ____________________— Temperature at which a liquid fuel produces sufficient vapors to support combustion once the fuel ignites. The fire point is usually a few degrees above the flash point.
A
- Fire Point
25
Q
- ____________________— Model of the three conditions/ elements necessary for combustion. The three sides of the triangle represent heat, oxygen, and fuel.
A
- Fire Triangle
26
Q
- ___________________ — Model of the four elements/ conditions required to create a fire. The four sides of the tetrahedron represent fuel, heat, oxygen, and a self-sustaining chemical chain reaction.
A
- Fire Tetrahedron
27
Q
- ___________________ — Range between the upper flammable limit and lower flammable limit in which a substance can ignite.
A
- Flammable (Explosive) Range
28
Q
- ____________________ — Minimum temperature at which a liquid gives off enough vapors to form an ignitable mixture with air near the surface of the liquid.
A
- Flash Point
29
Q
- ______________________— Rapid transition from the growth stage to the fully developed stage.
A
- Flashover
30
Q
- ______________________ — The space between at least one intake and one exhaust outlet. The difference in pressure determines the direction of the flow of gases through this space. Heat and smoke in a high-pressure area will flow toward areas of lower pressure.
A
- Flow Path
31
Q
- _________________________ — A material that will maintain combustion under specified environmental conditions.
A
- Fuel
32
Q
- _______________________— Electrically charged, highly reactive parts of molecules released during combustion reactions.
A
- Free Radical
33
Q
- _____________________ — The total quantity of combustible contents of a building, space, or fire area, including interior finish and trim, expressed in heat units of the equivalent weight in wood.
A
- Fuel Load
34
Q
- ______________________ — A singular item or object that is burning or that has been exposed to heat transfer from a fire.
A
- Fuel Package
35
Q
- _______________________— Fire with adequate oxygen in which the heat release rate and growth rate are determined by the characteristics of the fuel, such as quantity and geometry. Also known as Fuel-controlled.
A
- Fuel-Limited
36
Q
- ___________— Form of energy associated with the motion of atoms or molecules in solids or liquids that is transferred from one body to another as a result of a temperature difference between the bodies, such as from the sun to the earth. To signify its intensity, it is measured in degrees of temperature.
A
- Heat
37
Q
- _______________________ — The measure of the rate of heat transfer to or from a surface, typically expressed in kilowatts per square meter (kW/m2).
A
- Heat Flux
38
Q
- ________________________— Total amount of thermal energy (heat) that could be generated by the combustion (oxidation) reaction if a fuel were completely burned. The heat of combustion is typically measured in kilojoules per gram (kJ/g) or megajoules per kilogram (MJ/kg).
A
- Heat Of Combustion
39
Q
- _____________________ — Total amount of heat released per unit time. The __________________is typically measured in kilowatts (kW) or Megawatts (MW) of output.
A
- Heat Release Rate (HRR)
40
Q
- ______________________— Petroleum-based organic compound that contains only hydrogen and carbon; may also be used to describe those materials in a fuel load which were created using hydrocarbons such as plastics or synthetic fabrics.
A
- Hydrocarbon
41
Q
- _____________________— Colorless, toxic, and flammable liquid until it reaches 79° F (26° C). Above that temperature, it becomes a gas with a faint odor similar to bitter almonds; produced by the combustion of nitrogen-bearing substances.
A
- Hydrogen Cyanide (HCN)
42
Q
- _______________________ — The process of initiating self-sustained combustion.
A
- Ignition
43
Q
- ______________________— Mechanism or initial energy source employed to initiate combustion, such as a spark that provides a means for the initiation of self-sustained combustion.
A
- Ignition Source
44
Q
- _______________________ — Result of inefficient combustion of a fuel; the less efficient the combustion, the more products of combustion are produced rather than burned during the combustion process.
A
- Incomplete Combustion
45
Q
- ________________________ — Flames in the hot gas layer that indicate the gas layer is within its flammable range and has begun to ignite; often observed immediately before a flashover.
A
- Isolated Flames
46
Q
- ________________________ — Unit of work or energy in the International System of Units (SI); the energy (or work) when a unit force (1 newton) moves a body through a unit distance (1 meter). Joules are defined in terms of mechanical energy. In terms of thermal energy, joules refer to the amount of additional heat needed to raise the temperature of a substance, such as the 4.2 Joules needed to raise the temperature of 1 gram of water 1 degree Celsius. Takes the place of calorie for heat measurement (1 calorie = 4.19 J).
A
- Joule (J)
47
Q
- ___________________________— Lower limit at which a flammable gas or vapor will ignite and support combustion in confinement; below this limit the gas or vapor is too lean to burn (too much oxygen and not enough gas, so lacks the proper quantity of fuel).
A
- Lower Explosive Limit (LEL)
47
Q
- ____________________— Energy possessed by a moving object because of its motion.
A
- Kinetic Energy
48
Q
- ____________________________ — Lower limit at which a flammable gas or vapor will ignite and support combustion; below this limit the gas or vapor is too lean to burn (too much oxygen and not enough gas, so lacks the proper quantity of fuel).
A
- Lower Flammable Limit (LFL)
49
Q
- _________________ — Anything that occupies space and has mass.
A
- Matter
50
Q
- _________________ — Capable of being mixed in all proportions.
A
- Miscible
51
Q
- _________________ — Level at a compartment opening where there is an equal difference in pressure exerted by expansion and buoyancy of hot smoke flowing out of the opening and the inward pressure of cooler, ambient temperature air flowing in through the opening.
A
- Neutral Plane
52
Q
- ______________________ — Description of a fire burning in the open with no restrictions to its oxygen supply.
A
- Open Burning
53
Q
- ______________________— Chemical process that occurs when a substance combines with an oxidizer such as oxygen in the air; a common example is the formation of rust on metal.
A
- Oxidation
54
Q
- _______________— Any material that readily yields oxygen or other oxidizing gas, or that readily reacts to promote or initiate combustion of combustible materials.
A
- Oxidizer
55
Q
- ___________________ — Moment when a mixture of fuel and oxygen encounters an external heat (ignition) source with sufficient heat or thermal energy to start the combustion reaction.
A
- Piloted Ignition
56
Q
- ___________________ — Flammable liquids that have an attraction to water, much like a positive magnetic pole attracts a negative pole; examples include alcohols, esters, ketones, amines, and lacquers.
A
- Polar Solvents
57
Q
- ____________________ — Stored energy possessed by an object that can be released to perform work at a future time.
A
- Potential Energy
58
Q
- ____________________— Amount of energy delivered over a given period of time.
A
- Power
59
Q
- ___________________ — Materials produced and released during burning.
A
- Products of Combustion
60
Q
- ____________________ — Force per unit area exerted by a liquid or gas measured in pounds per square inch (psi) or kilopascals (kPa).
A
- Pressure
61
Q
- ____________________ — The chemical decomposition of a solid material by heating. Pyrolysis precedes combustion of a solid fuel.
A
- Pyrolysis
62
Q
- ____________________ — Transfer of heat energy from one body to another body through intervening space by electromagnetic waves.
A
- Radiation
63
Q
- ______________________ — Fuel that is being oxidized or burned during combustion.
A
- Reducing Agent
64
Q
- _______________________ — Condition in which the unburned fire gases that have accumulated at the top of a compartment ignite and flames propagate through the hot gas layer or across the ceiling.
A
- Rollover
65
Q
- _____________________ — The result of exothermic reactions, occurring spontaneously in some materials under certain conditions, whereby heat is generated at a rate sufficient to raise the temperature of the material.
A
- Self-Heating
66
Q
- _________________________— Emergency incident operations consisting of an organized search for the occupants of a structure or for those lost in the outdoors, and the rescue of those in need.
A
- Search and Rescue (SAR)
67
Q
- __________________— Ongoing evaluation of influential factors at the scene of an incident.
A
- Size Up
68
Q
- ___________________ — Form of fire gas ignition; the ignition of accumulated flammable products of combustion and air that are within their flammable range.
A
- Smoke Explosion