Ifsta Essentials Ch 6 Portable Extinguishers

Front 1

when are they intended to be used?

Back 1

on small fires in incipient or early growth stage of fire

Front 2

5 classifications of fire

Back 2

class a -ordinary combustibles
class b- flammable or combustible liquids and gases
class c- energized electrical
class d- combustible metals
class k- kitchen=combustible cooking oils

Front 3

what is a 1a rating for class a

Back 3

1 and 1/4 gallons of water
2a would be 2 1/2
3a would be 3 and 3/4

Front 4

20 b rating for class b

Back 4

will extinguish 20 square feet of liquid

Front 5

class c rating

Back 5

will not conduct electricity then

Front 6

does class d have a numerical rating

Back 6

no

Front 7

obsolete extinguishers

Back 7

soda acid, foam, internal cartridge operated water and loaded stream, internal cartridge dry chem,

Front 8

portable extinguishers classified by

Back 8

types of fires and in some cases their performance capabilities

Front 9

which types of fire have numerical rating

Back 9

a and b

Front 10

class a numerical ranges

Back 10

1a to 40a

Front 11

class b numerical ranges

Back 11

1 to 640

Front 12

what is excluding oxygen?

Back 12

smothering

Front 13

afff creates

Back 13

a foam blanket and vapor seal on surface of fuel

Front 14

halon less than 9 lbs has what rating

Back 14

only b and c

Front 15

halon more than 9 has what rating

Back 15

a, b, and c

Front 16

co2 is most effective on what types

Back 16

b, and c not
discharge in form of gas displaces oxygen and smothers fire

Front 17

inspecting extinguishers looking for

Back 17

accessible and serviceable and simplicity of operation
usually done by building owner or owners designee

Front 18

Nfpa requires fire apparatus to be equipped with

Back 18

minimum with a dry chem with 80bc rating and 2 ½ gallon water type

Front 19

stored pressure water extinguisher

Back 19

water is stored in tank with either compressed air or nitrogen

Front 20

afff uses what nozzle

Back 20

different from stored pressure water in two ways
1.contains specified amount of afff concentrate mixed with water
2.has air aspirating nozzle to produce better quality of foam

Front 21

dry chem can be

Back 21

ab rating or a,b,c rating

Front 22

stored pressure extinguisher should be

Back 22

200 psi

Front 23

Nfpa requires what to be on extinguishers

Back 23

pictographs

Front 24

using portable extinguishers PASS

Back 24

pull pin apply sweeping motion at base of fire after used all of extinguisher agent put it on side so know its already been used

Front 25

class d has what shape?

Back 25

yellow star

Front 26

shapes and colors for classes

Back 26

a=green triangle
b= red square
c=blue circle
d=yellow star
k=black hectagon

Front 27

is the More gently foam applied the more rapid extinguishment true or false?

Back 27

true

Front 28

foam proportinoer uses what principle

Back 28

venturi= forced water or air under pressure increase in velocity of fluid through orifice creates a pressure, the surrounding fluid is then under greater reassure and flows into the negative pressure

Front 29

saponification

Back 29

alkaline based chemicals mixed with grease creates soapy like film

Front 30

really white light burning in fire might tell ya what?

Back 30

class d metal magnesium

Front 31

do the inline eductor and air nozzle have to be the same gpm?

Back 31

yes

Front 32

foam extinguishes by

Back 32

-seperating
-cooling
-smoothering
-penetrating

Front 33

methods to apply foam

Back 33

roll on-foam stream on ground near front edge of burning liquid
bank down- elevated object near spill, foam stream directed onto object and run onto surface of fuel.This method primarily in dike fires and fire involving transport vehicles
-rain down method=primary technique used on above ground storage tank fires

Front 34

class a foam and water tension

Back 34

special formulation of hydrocarbon surfactants that reduce water tension allowing better water penetration and increasing effectiveness

Front 35

which appliance is used for generation of low expansion foam?

Back 35

air aspirating foam nozzle

Front 36

if 1 extinguisher doesnt put fire out do what

Back 36

withdraw and reasses the situation

Front 37

high expansion
med expansion rates
low epansion rates

Back 37

high 200:1 to 1000:1
med 20:1 to 200:1
low 20:1

Front 38

what percentage deficient in extinguisher weight do we remove it?

Back 38

10 percent

Front 39

can class b foams be used to suppress vapors that havent ignited yet?

Back 39

yes

Front 40

which method is used on dike fires and transport vehicle fires?

Back 40

bank down

Front 41

what type of foam is batch mixing most appropriate for?

Back 41

class a

Front 42

2 types of portable foam proportioners

Back 42

-in line foam eductors
-foam nozzle eductors

Front 43

3 expelling agents for extinguishers

Back 43

manual pump
stored pressure
pressure cartridge

Front 44

Elements needed to produce ff foam

Back 44

Foam concentrate
Air
Water
Mechanical agitation

Front 45

Class b foam designed solely for

Back 45

hydrocarbon fires will not extinguish polar solvent fires

Front 46

Fluoroprotein foams are better than straight protein foams? true or false

Back 46

true

Front 47

Proportioning methods of foam

Back 47

Induction
Injection
Batch mixing
Premixing

Front 48

State law- extinguishers must be serviced

Back 48

once a year and after each use

Front 49

underwriter laboratories is ones who determine

Back 49

extinguisher ratings