2. Enhanced Fire Behavior

Question 1

A simple model that explains nonflaming or surface combustion

Answer 1

Fire Triangle

P20

Question 2

Kinetic energy associated with the movement of atoms and molecules that compromise

Answer 2

Thermal energy

P21

Question 3

Measurement of kinetic energy

Answer 3

Temperature

P21

Question 4

The movement of thermal energy from objects of higher temperature to those of lower temperature

Answer 4

Heat

P21

Question 5

The capacity to perform work

Answer 5

Energy

P21

Question 6

Defined as being equal to 1 N over a distance of 1 m.

Answer 6

Joule

P22

Question 7

The US fire service uses the customary system in which the unit of measurement for heat energy is____.

Answer 7

BTU

P22

Question 8

The ______ of any fuel determines its heat of combustion and has a significant influence on its energy or heat release rate (HRR)

Answer 8

Chemical contact/composition

P23
P36

Question 9

Heat of combustion is usually expressed in either____ or ____.

Answer 9

Kilojoules/gram (kJ/g)

Megajoule/kilogram (MJ/kg)

P23

Question 10

Total amount of energy released when a specific amount of that fuel is oxidized/burned.

Answer 10

Heat of combustion

P23

Question 11

Energy released per unit of time as a given fuel burns.

Answer 11

Heat release rate (HHR)

P24

Question 12

Heat release rate is expressed in ___ or ___.

Answer 12

Kilowatts (kW)

megawatts (MW)

P24

Question 13

The dominant method of heat transfer in the early stages of fire development.

Answer 13

Convection

P24

Question 14

The point where the three elements of the fire triangle come together and combustion begins.

Answer 14

Ignition

P26

Question 15

When sufficient oxygen is available, fire development is controlled by the ____ and ____ or the fuel.

Answer 15

Characteristics

Configuration

P 26

Question 16

In a compartment fire, the most fundamental fuel characteristics influence in fire development are ____ and ____.

Answer 16

Mass

Surface area

P31

Question 17

The actual and potential ventilation of a structure based on structural openings, construction type, and building ventilation systems.

Answer 17

Existing ventilation

P34

Question 18

Indicators of potential fire behavior prior to ignition.

Answer 18

Building features

P37

Question 19

Used to describe how difficult it is to see through smoke

Answer 19

Optical density/opacity

P40

Question 20

Term that refers to the buoyancy of smoke.

Answer 20

Physical density

P40

Question 21

Refers to the movement of air toward burning fuel in the movement of smoke out of the compartment.

Answer 21

Airflow

P40

Question 22

Differences in density between the hot smoke in cooler air.

Answer 22

Gravity current

P40

Question 23

Alternate outward movement of smoke followed by an inward movement of air, indicative of an under ventilated fire with potential Backdraft conditions.

Answer 23

Pulsing airflow

P42

Question 24

The key differences between a Backdraft and a smoke explosion.

Answer 24

Temperature of the fire gases

oxygen concentration

P54