Fire Behavior

Question 1

The fire triangle is composed of:

Answer 1

Heat, Fuel, and Oxygen

Question 2

The fire tetrahedron includes all of the elements of the fire triangle plus:

Answer 2

Chemical Reaction

Question 3

The 3 physical states of fuel are:

Answer 3

Solid, Liquid, and Gas

Question 4

Which state must a fuel be in for combustion to take place?

Answer 4

Vapor

Question 5

Which toxic gas is commonly produced by fire?

Answer 5

Hydrogen Cyanide

Question 6

What is the term for the lowest temperature at which a liquid produces enough flammable vapor to burn momentarily?

Answer 6

Flash Point

Question 7

What is another term for flammability limits?

Answer 7

Explosive Limits

Question 8

Fire can be extinguished by:

Answer 8

reducing heat, removing oxygen, removing fuel, or stopping chemical chain reaction

Question 9

What is the method of choice for extinguishing most Class B fires?

Answer 9

Excluding the Oxygen

Question 10

What is the percentage of oxygen normally found in air?

Answer 10

21%

Question 11

What does smoke puffing in and out of a structure indicate?

Answer 11

Backdraft Conditions

Question 12

During the ___ phase, fire has consumed either the available fuel or oxygen, and temperature drops.

Answer 12

Decay

Question 13

Which stage of fire releases the maximum amount of heat for the available fuel and produces large volumes of fire gases?

Answer 13

Fully Developed

Question 14

What is the process called when a material decomposes upon being exposed to heat in the absence of oxygen?

Answer 14

Pyrolysis

Question 15

What is the lowest temperature at which a fuel-air mixture will ignite spontaneously called?

Answer 15

Ignition Temperature

Question 16

A gas with a vapor density of ___ will rise in air.

Answer 16

0.1

Question 17

Which of the following is a component of a BLEVE?

Answer 17

A pressurized flammable liquid vessel.

Question 18

The phenomenon by which heat, smoke, and fire gases will travel upward to the highest point become trapped, accumulate, bank down, and spread out laterally is known as:

Answer 18

Flashover

Question 19

What is the 2nd phase of fire?

Answer 19

Growth

Question 20

Flashover occurs during which phase of fire?

Answer 20

Fully Developed

Question 21

The sudden introduction of air into an oxygen-depleted, superheated space may result in ___.

Answer 21

Backdraft

Question 22

When water is converted to steam, it occupies ___ space.

Answer 22

Much more

Question 23

___ is the transition between the growth and fully developed stages of fire.

Answer 23

Flashover

Question 24

The majority of fires are extinguished by which method?

Answer 24

Cooling the Fuel

Question 25

What is the term for temperature in a room reaching the point where all the combustible contents of the room ignite?

Answer 25

Flashover

Question 26

What is the term for the lowest temperature at which a liquid produces enough vapor to sustain a continuous fire?

Answer 26

Flame Point

Question 27

At room temperature, combustions is supported at oxygen concentrations as low as ___ percent.

Answer 27

14%

Question 28

Turbulent smoke is an indication of impending ___.

Answer 28

Flashover

Question 29

What is the term for a high-volume, high-velocity, turbulent, ultra-dense black smoke?

Answer 29

Black Fire

Question 30

Smoke that is produced by ordinary household materials when they are first heated has which sort of appearance?

Answer 30

Slow moving, and white.

Question 31

Heat can travel throughout a burning building by one or more of the following methods:

Answer 31

Conduction, Radiation, and Convection.