Ifsta Chpt 3 Fire Behavior

Front 1

What is anything that occupies space and has mass?

Back 1

matter

Front 2

What is a chemical reaction between two or more materials that changes the materials and produces heat, flames, and toxic smoke?

Back 2

exothermic heat reaction

Front 3

An ___________ heat reaction is a chemical reaction in which a substance absorbs heat energy.

Back 3

endothermic

Front 4

Combustion is an exothermic chemical reaction that releases energy in the form of heat and sometimes light. (true/false)

Back 4

TRUE

Front 5

How are modes of combustion differentiated?

Back 5

Based on where the reaction is occurring

Front 6

Accelerant is a component of the fire triangle. (true/false)

Back 6

FALSE

Front 7

Energy possessed by an object that may be released in the future is known as _________ ______.

Back 7

potential energy

Front 8

Which type of energy is the energy possessed by a moving object?

Back 8

Kinetic energy

Front 9

Energy is the capacity to perform work. (true/false)

Back 9

TRUE

Front 10

The _____ is the measure for heat energy in the International System of Units?

Back 10

Joule

Front 11

What is the measure for heat energy in the customary system?

Back 11

British Thermal Unit (BTU)

Front 12

The chemical composition of a substance through the action of heat is known as _________.

Back 12

pyrolysis

Front 13

Autoignition is _ of the _ forms of ignitions.

Back 13

1 of the 2

Front 14

What is the temperature to which the surface of a substance must be heated for ignition and self-sustained combustion to occur?

Back 14

Autoignition temperature

Front 15

Chemical heat energy is the most common source of heat in combustion reactions. (true/false)

Back 15

TRUE

Front 16

____-_______ is a form of chemical heat energy that occurs when a material increases in temperature without the addition of external heat.

Back 16

Self-heating

Front 17

The rate of the oxidation reaction _________ as more heat is generated and held by the materials insulating the fuel.

Back 17

INCREASES

Front 18

Mechanical heat energy is generated by ________ or __________.

Back 18

friction, compression

Front 19

What is the transfer of heat within a body or to another body by direct contact?

Back 19

Conduction

Front 20

__________ is the transfer of heat energy from a fluid to a solid surface.

Back 20

Convection

Front 21

The transmission of energy as an electromagnetic wave is known as _________.

Back 21

Radiation

Front 22

What type of agent is a material that absorbs heat but does not participate actively in the combustion reaction?

Back 22

Passive agent

Front 23

The material or substance being oxidized or burned in the combustion process is known as ____.

Back 23

Fuel

Front 24

24. Gases with a vapor density of less than 1 will ____.

Back 24

RISE

Front 25

Specific gravity is the ratio of the mass of a given volume of a liquid compared with the mass of an equal volume of water at the same temperature. (true/false)

Back 25

TRUE

Front 26

What is the transformation of a liquid to a vapor gaseous state?

Back 26

Vaporization

Front 27

The _____ _____ is the temperature at which a liquid gives off sufficient vapors to ignite, but not sustain, combustion.

Back 27

Flash point

Front 28

The fire point is the temperature at which sufficient vapors are being generated to sustain the combustion reaction. (true/false)

Back 28

TRUE

Front 29

A substance's __________ is the extent to which it will mix with water.

Back 29

Solubility

Front 30

Materials that will mix in any proportion in water are ________.

Back 30

Miscible

Front 31

The surface area of a fuel in proportion to its mass is called _______-to-____ ratio.

Back 31

Surface-to-mass ratio

Front 32

What is the total amount of energy released when a specific amount of a given fuel is oxidized?

Back 32

Heat of combustion

Front 33

What is the energy released per unit of time as a given fuel burns?

Back 33

Heat release rate

Front 34

Flammable limit is the range of concentrations of the fuel vapor and air. (true/false)

Back 34

FALSE; flammable range

Front 35

Carbon ________ is frequently identified as the cause of death for civilian fire fatalities.

Back 35

Monoxide

Front 36

________ _______ acts to prevent the body from using oxygen at the cellular level and is a byproduct of the combustion of polyurethane foam.

Back 36

Hydrogen Cyanide

Front 37

Which substance is a colorless-to-clear yellow liquid with a bitter almond odor?

Back 37

Benzaldehyde

Front 38

Class B fires involve flammable and combustible liquids and gases. (true/false)

Back 38

TRUE

Front 39

Class C fires involve ordinary combustible materials. (true/false)

Back 39

FALSE; Class A

Front 40

Which type of fire involves energized electrical equipment?

Back 40

Class C

Front 41

Combustible metal fires are Class _ fires.

Back 41

D

Front 42

Which type of fire involves oils and greases normally found in commercial kitchens?

Back 42

Class K

Front 43

When sufficient oxygen is available and fire development is controlled by the characteristics and configuration of the fuel, the fire is said to be ____ controlled.

Back 43

fuel

Front 44

The first stage of the burning process in a confined space in which the substance being oxidized is producing some heat, but has not spread to other substances, is known as?

Back 44

The incipient stage

Front 45

Nonpiloted ignition is caused when a material reaches its autoignition temperature as a result of self-heating. (true/false)

Back 45

TRUE

Front 46

Thermal layering of gases is the tendency of gases to form into layers according to temperature, this is called ____ ______________.

Back 46

heat stratification

Front 47

What phenomenon is observed when pockets of flames move through the hot gas layer above the neutral plane?

Back 47

Ghosting

Front 48

A condition where the unburned fire gases accumulated at the top of the compartment ignite and flames propagate through the hot gas layer or across the ceiling is known as ________.

Back 48

rollover

Front 49

Flashover occurs when the temperature in a compartment results in the simultaneous ignition of all of the combustible contents in the space. (true/false)

Back 49

TRUE

Front 50

The fire stage that occurs when all combustible materials in the compartment are burning is known as the _____ _________ stage.

Back 50

fully developed

Front 51

The fire stage in which the oxygen concentration falls to the point where flaming combustion can no longer be supported.

Back 51

The decay stage

Front 52

An increase in ventilation can result in a deflagration called _________.

Back 52

backdraft

Front 53

____ and _______ area are the most fundamental fuel characteristics influencing fire development in a compartment.

Back 53

Mass, surface

Front 54

A fire in a large compartment will develop ______ than a fire in a small compartment.

Back 54

slower

Front 55

Cooling with ______ is one of the most common methods of fire control and extinguishment.

Back 55

water

Front 56

Water has its greatest effect on fire when it's vaporized into steam. (true/false)

Back 56

TRUE