Foam

Question 1

KK Bubble Cup nozzle are intended for what type of foam?

Answer 1

Class A

Question 2

Hi expansion foam can achieve expansion ratio can be as high as ______ to ___ or higher

Answer 2

1000 to 1

Question 3

Several different models are available that can create ______cubic foot per minute to ________ cubic foot per minute depending on the unit

Answer 3

1200to 14000

Question 4

Hi expansion foam generators are powered by

Answer 4

Electricity diesel or water powered

Question 5

Reduces the ability of fuels to absorb water

Answer 5

Surface tension

Question 6

consists of a solvent a stabilizing agent and then some products a corrosion inhibitor

Answer 6

Class a foam

Question 7

__________ More uniform bubbles will last longer then _________ less uniform bubbles

Answer 7

Smaller

Larger

Question 8

Normally used to form an insulating blanket on a few will being treated

Answer 8

Dry from

Question 9

Cools and what’s better than dry foam solution is slightly frothy and flows briefly and then stops when applied to a surface

Answer 9

Fluid foam

Question 10

Dry foam is most frequently used for

Answer 10

Pre-treatment of exposures in the path of oncoming fires in a solution of .5 to 1%
Medium expansion nozzle to create a thick blanket

Question 11

Fluid foam is used for

Answer 11

Deep-seated fires and mop up of some wild man and structure fires
Low expansion nozzle .5 to 1%
Medium expansion nozzle .3 to .5%

Question 12

Flows easily and releases water very quickly

Answer 12

Wet foam

Question 13

What foam should be used in

Answer 13

Initial attack and situations that dictate the use of standard fog nozzle
Mix ratio of .1 to .3% for adequate penetration

Question 14

Two ways to mix foam concentrate with water are

Answer 14

Batch mixing and mechanical foam for proportioners

Question 15

Types of proportioner’s

Answer 15

Around the pump proportioner
suction side proportioner eductors
Automatically regulated proportioner balanced pressure bladder proportioner
electronically controlled direct injection proportioner

Question 16

Low expansion nozzles is from _______ to_______

Answer 16

1:1 to 20:1

Question 17

Medium expansion nozzle generates expansion ratios from

Answer 17

20: one up to 200:1

Question 18

Hi expansion nozzles are foam generators generates foam at the ratio of

Answer 18

200:1 and up

Question 19

Standard nozzles used for a class a foam are

Answer 19

KK FS 20/60 duel gallonage bubble cup

Question 20

Class a foam should be used on all fires involving

Answer 20

Ordinary combustible’s

Question 21

When fighting vehicle fires rapid knockdown can be achieved by using a ____ to_____ % wet foam

Answer 21

.3 to .5%

Question 22

On initial attack of a structure fire class a foam should be applied using a standard nozzle in a wet from consistency of

Answer 22

.1-.3%

Question 23

Do not apply from blankets until cleared to do so by the

Answer 23

Ic or the investigator

Question 24

The primary objective of class B foam is to control

Answer 24

Vapor in emissions

Question 25

The lowest temperature at which a liquid will give off sufficient vapor to flash momentarily, when in ignition sources introduced, but not continue to burn

Answer 25

Flashpoint

Question 26

Flammable liquids have a flashpoint below

Answer 26

100°F

Question 27

Combustible liquids have a flashpoint above

Answer 27

100°F

Question 28

The foam triangle is

Answer 28

Water, from concentrate, and air

Question 29

The weight or density of a vapor compared to air being greater than one

Answer 29

Vapor density

Question 30

The measure of weight of a liquid compared to water

Answer 30

Specific gravity

Question 31

Class B foam will extinguish a fire involving _______ _______ hydrocarbons such as gasoline, diesel, or kerosene

Answer 31

Non polar

Question 32

``` True or false Not all class B foams will extinguish a fire involving a polar hydrocarbon such as alcohol, acetone, or MEK ```

Answer 32

True

Question 33

_______ _________ Will burn with the blue, green, light orange, or obvious Lee chemical colored flame

Answer 33

Polar solvents

Question 34

AFFF commonly available and percentages foam concentrate

Answer 34

One, three, six

Question 35

It is recommended firefighters not use wider than ____ degree fog when making foam with a standard fog nozzle

Answer 35

30

Question 36

Three methods of applying foam are

Answer 36

Rainfall or lob method Deflection method Roll on or bounce method