Chapter 6- Extingushing Agents

Question 1

Extinguishing agents such as dry chemical, halons, and halon replacements are commonly used in aircraft firefighting:

Answer 1

Auxiliary agents

Question 2

Aircraft firefighting extinguishing agents that are designed for mass application an rapid knockdown of a fire are known as:

Answer 2

Primary agents

Question 3

What is the most common extinguishing agent used in the fire service:

Answer 3

Water

Question 4

What must be generally added to water at large air craft fuel fires:

Answer 4

Foaming agents

Question 5

When water is the only available extinguishing agent to combat a spilled fuel fire,it should be applied in a:

Answer 5

Fog Pattern

Question 6

What is an inherent hazard of water:

Answer 6

Steam

Question 7

Water is an excellent:

Answer 7

Conductor of electricity

Question 8

This method of extinguishing fire with foam prevents air an flammable vapors from combining:

Answer 8

Smothering

Question 9

This method of extinguishing fire with foam prevents the release of flammable vapors:

Answer 9

Suppressing

Question 10

Foam must be reapplied:

Answer 10

As necessary

Question 11

To produce quality firefighting foam you need:

Answer 11

Foam concentrate,water, air, mechanical agitation

Question 12

This term refers to the raw foam liquid as it rests in its storage container before the introduction of water and air:

Answer 12

Foam concentrate

Question 13

This term refers to a device that introduces foam concentrate into the water stream in specific amounts to make the foam:

Answer 13

Foam proportioner

Question 14

This term refers to a properly proportioned mixture of foam concentrate an water before the introduction of air

Answer 14

Foam solution

Question 15

This term refers to the completed topic after air is introduced into the foam solution:

Answer 15

Finished foam:

Question 16

A characteristic of polar solvents

Answer 16

Flammable

Question 17

The characteristic of a hydrocarbon fuel:

Answer 17

Float on water, petroleum-based, Hydrophobic

Question 18

Example of hydrocarbon fuels are:

Answer 18

Crude oil, fuel oil, jet fuel, diesel

Question 19

Example of polar solvents are liquid fuels such as:

Answer 19

Acetone, alcohol, ketones, esters, lacquer thinner

Question 20

Class B foams designed solely for hydrocarbon fires will not

Answer 20

Will not extinguish pilot solvent fires regardless of the concentration used

Question 21

This foam concentrate is essentially a wetting agent that reduces the surfaces tensions of water an allows it to soak into combustible materials more easily than plain water:

Answer 21

Class A foam

Question 22

This foam concentrate is used to extinguish fires involving flammable an combustible liquids

Answer 22

Class B foam

Question 23

Class B foams are mixed in proportions from

Answer 23

1% to 6%

Question 24

This term refers to the increase in volume of a foam solution when it’s aerated

Answer 24

Foam expansion

Question 25

This foam is the most commonly used foam used at airport today

Answer 25

Aqueous film forming foam (AFFF)

Question 26

This type of foam has an air/solution ratio up to 20 parts finished foam for every part of foam solution

Answer 26

Low expansion foam

Question 27

This type of foam is recommended for extinguishing hydrocarbon fuel fires

Answer 27

Aqueous film forming foam (AFFF)

Question 28

Aqueous film forming foam has a

Answer 28

Low viscosity which quickly spreads across the fuel surface to form a vapor-suppressing film

Question 29

The following foam has a detergent base an low water content

Answer 29

High-expansion foams

Question 30

A basic application of high-expansion foam is:

Answer 30

Fixed extinguishing systems for industrial uses

Question 31

This foam concentrate storage method consist of a large plastic tank inside metal pallets

Answer 31

Intermediate Bulk Containers

Question 32

The following foam concentrate storage method consist of 5 gallon containers used for shipping an storing foam concentrate

Answer 32

Pails

Question 33

The following foam concentrate storage method eliminates the need to use another method of storage container:

Answer 33

Apparatus tanks B

Question 34

The FAA recommends that ARFF apparatus foam systems be tested using a refractomerteror conductivity meter at least

Answer 34

Twice a year

Question 35

The following method of proportioning foam uses the pressure energy in the stream of water to induct foam concentrate into the fire stream

Answer 35

Induction

Question 36

This method of proportioning foam uses an external pump or water pressure to force foam concentrate into the fire stream at the correct ratio In comparison to the flow

Answer 36

Injection

Question 37

This method of foam proportioning consists of simply pouring an appropriate amount of foam concentrate into a tank of water

Answer 37

Batch mixing

Question 38

This method of proportioning foam mixes pre measured portions of water an foam concentrate in a container

Answer 38

Pre mixing

Question 39

This method of proportioning foam is the simplest means of proportioning foam

Answer 39

Batch mixing

Question 40

This following portable foam proportioner is designed to be either directly attached to the pump panel discharge or connected at some point in the hose lay

Answer 40

In-line foam eductors

Question 41

This portable foam proportioner is used where flows in excess of 350 gpm are required

Answer 41

Self-educting master stream foam nozzles

Question 42

This apparatus-mounted foam proportioning systems consists of a small water line connected from the discharge side of the pump back to the intake side of the pump

Answer 42

Around the pump proportioners

Question 43

The following apparatus mounted foam proportioning system has the advantage of being maintained in a ready to pump condition an requiring no flushing after use

Answer 43

Variable flow demand type balanced pressure proportioning system

Question 44

The following apparatus mounted foam proportioning system has a concentrate line connected to each fire pump discharge outlet

Answer 44

Bypass-type balanced pressure proportioner

Question 45

The following apparatus mounted foam proportioning system has the advantages of being able to simultaneously discharge foam from some outlets an plain water from others

Answer 45

Bypass type balanced pressure proportioners

Question 46

The following apparatus mounted foam proportioning system has the advantage of being able to automatically adjust to changes in water flow when nozzles are either opened

Answer 46

Variable flow variable rate direct injections systems

Question 47

The following apparatus mounted foam proportioning system has the advantage of being able to have the nozzles either above or below the pump, without affecting the foam proportioning

Answer 47

Variable flow variable rate direct injection system

Question 48

The following foam generating system introduced compressed air into the foam solution prior to discharge into hose line

Answer 48

High energy foam generating systems

Question 49

The two most common types of hand line nozzles used by ARFF firefighters are Standard fog nozzles and :

Answer 49

Air aspirating foam nozzles

Question 50

Large pre plumbed master stream appliances connected directly to a pump that is mounted on a pumper, a tar for or some ARFF apparatus are

Answer 50

Turret nozzles

Question 51

What is an operating characteristic of non aspirating nozzles

Answer 51

Can generate a wide fog pattern

Question 52

What is an operating characteristic of aspirating nozzles

Answer 52

Restricts reignition and burn back

Question 53

This method foam application directs the foam stream on the ground near the front edge of a burning liquid pool

Answer 53

Roll on method

Question 54

The following method of foam application may be employed when an elevated object is near or within the area of a burning pool of liquid

Answer 54

Bank down method

Question 55

This method of foam application usually involves the foam stream being applied through a bumper turret

Answer 55

Base of the fire method

Question 56

This following method of foam application is the primary manual application technique used on above ground storage tanks fire

Answer 56

Rain fall (rain down) method

Question 57

The following method of foam application extends the reach of the foam stream during initial approach an application

Answer 57

Rainfall (rain down) method

Question 58

This action should be performed after dry chemicals have been used to accomplish a quick knock down of an aircraft fire

Answer 58

Apply a blanket of foam

Question 59

The use of dry chemical,water, and AFFF is referred to as

Answer 59

Wet chemical

Question 60

The following dry chemical extinguisher is recommended for fighting aircraft engine fires

Answer 60

Regular B:C-rated dry chemical extinguishers

Question 61

The pressurized gas in dry chemical extinguishers is

Answer 61

Nitrogen or carbon dioxide

Question 62

The following are two basic designs for handled an wheeled dry-chemical extinguishers

Answer 62

Stored pressure an cartridge operated

Question 63

The following is the dry-chemical agent of choice for multiagent applications because of its comparability with AFFF

Answer 63

Purple K

Question 64

All dry-chemical agents are

Answer 64

Non conductive

Question 65

The following is the most common method of application for dry chemical

Answer 65

Dispense using a handline stored at some position on the vehicle

Question 66

Clean agents are designed to

Answer 66

Leave little if no residue

Question 67

The following method of application for dry chemical allows the dry chemical to stay inside the water stream of the turret, greatly extending the effectiveness of the agent

Answer 67

Water stream injection

Question 68

The following method of application for application for dry chemical involves the manufacturer mounting an independent dry chemical nozzle directly over the water/foam nozzle on the roof or bumper turret

Answer 68

Piggybacking