Chapter 8 Extinguishing Agents

Question 1

Water can be found in three physical states

Answer 1

Liquid
Gas
Solid

Question 2

What temperature does water begin to freeze?

Answer 2

32°

Question 3

What temperature does water convert to a steam or gas?

Answer 3

212°

Question 4

At 212° water expands ___ times its original volume

Answer 4

1700

Question 5

Probably the most widely used nozzle in the fire service today

Answer 5

Fog nozzle

Question 6

We’re following through simple steps can be used to figure the pump discharge pressure needed

Answer 6

Calculate the Constants
Calculate the additional pressure needed due to elevation
Calculate the friction loss in the hose

Question 7

The hazardous materials foams can be extremely specific such as hazardous material vapor mitigating foam or film, forming floral protein foam, which can be applied at the base of a tank and allowed to float to the top of the product to extinguish the fire. This technique is known as.

Answer 7

Sub surface injection

Question 8

Foam is commonly used for two basic types of hazardous materials

Answer 8

Hydrocarbons and polar solvents

Question 9

Petroleum base products, such as gasoline, benzene, and toluene

Answer 9

Hydrocarbons

Question 10

Alcohol based products, such as ethanol, ketones, lacker thinners, and even some acids

Answer 10

Polar solvents

Question 11

Foam is made up of ___ percent or more water the other ___ or less foam concentrate

Answer 11

90%

Question 12

If the product burning were a hydrocarbon, the foam blanket would be made up air ___ percent water and ___ percent foam concentrate

Answer 12

97%
3%

Question 13

If the product burning were a ____ the foam blanket would be made up of air 97% water and 3% foam concentrate

Answer 13

Hydrocarbon

Question 14

Applicable on both hydrocarbons 3% and polar solvents 6%

Answer 14

AFFF

Question 15

This kind of foam can be used on both polar solvents and hydrocarbons at 3%

Answer 15

Gold foam

Question 16

Work by breaking down the surface tension of water

Answer 16

Class A foam

Question 17

Makes water wetter also known as a wetting agent

Answer 17

Class A foam

Question 18

The use of ____ produces high-quality foam bubbles that are small and consistent in size and density. The bubbles allow this foam to stay together and provide 25% better drain time for the foam, allowing the foam to work better and be more persistent.

Answer 18

Compressed air foam system (CAFS)

Question 19

Generally used on flammable liquid fires such as grease and gasoline. It is very common and fire extinguishers in hood systems.

Answer 19

Dry chemical

Question 20

Special purpose, extinguishing agents used for specific applications, such as possible metals or class D fires

Answer 20

Dry powder

Question 21

____ fire suppression systems are designed for protecting kitchen hood Plenum’s exhaust ducts grease filters and cooking appliances from grease fires

Answer 21

Wet Chemical class K

Question 22

Primarily used on class B and class C fires and come in the form of portable or wheeled extinguishers. The extinguishment is accomplished when gas discharged from the extinguisher smothers the fire

Answer 22

Carbon dioxide

Question 23

Two types of halon were used and may still be seen in the field ___
A liquid form of halon and ___ gaseous form

Answer 23

Halon 1211
Halon 1301

Question 24

_____ what is primarily used for protecting sensitive electronic equipment, such as computers and communication equipment because it did not leave a residue

Answer 24

Halon 1301

Question 25

Water extinguishes fire through three principal methods:

Answer 25

Cools the burning material Smothers the fire Separates the fuel from the heat

Question 26

The following simple steps can be taken on the fire ground to reduce friction loss

Answer 26

REDUCE hose length Use a LARGER hose REDUCE the number of couplings and appliances used REDUCE the number of bends and kinks in the hose CHANGE the type and/or size of the nozzle

Question 27

The following three simple steps can be used to figure the pump discharge pressure needed:

Answer 27

Calculate the constants Calculate the additional pressure needed due to elevation Calculate the friction loss in the hose CHANGE

Question 28

Foam is created by using mechanical agitation to mix three ingredients together :

Answer 28

Air Water Foam concentrate

Question 29

The method used to mix ingredients of foam, comes from nozzles and foam makers

Answer 29

Mechanical agitation

Question 30

Most manufacturers of foam require that they be proportioned at 6% for ? And 3% for?

Answer 30

6 for polar solvents 3 for hydrocarbons

Question 31

Class A foam is designed purely for

Answer 31

Class A combustibles NOT EFFECTIVE ON CLASS B MATERIALS

Question 32

Many departments have moved to AFFF 3% and 6% foam, which is also referred to as AFFF alcohol-type concentrate ( AFFF ATC or AR ) because?

Answer 32

It is applicable on both hydrocarbons (3%) and polar solvents (6%)

Question 33

AFFF can be used on class ___ if proportioned very low

Answer 33

Class A Such as 1%

Question 34

In reference to gold foam, because not as much of product is needed to create an effective foam blanket, the foam concentrate lasts longer on what kinds of fires?

Answer 34

Polar solvent fires

Question 35

Class A foams work by?

Answer 35

Breaking down the surface tension of water

Question 36

Special purpose extinguishing agents used for specific applications such as combustible metals or class D fires

Answer 36

Dry powders