Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Apperatus Tech Test > IFSTA 14 Foam > Flashcards

IFSTA 14 Foam Flashcards

1
Q

define mechanical foam

3rd 480

A

Foam produced by physical adaptation of a mixture including phone concentrate water and air

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

define proportioning

3rd 480

A

Mix of water with an appropriate amount of foam concentrate in order to form a foam solution

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

define aeration

3rd 480

A

Introduction of air into a foam solution to create bubbles resulting in finished foam

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Define eduction

3rd 480

A

Process used to mix foam concentrate with water in a nozzle or proportioner

concentrate is drawn into water by Venturi method

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

define foam concentrate

3rd 480

A

Raw chemical compound solution that is mixed with water in air to produce finish foam

maybe protein, synthetic, acqui film forming, high expansion, or alcohol based

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

define foam solution

3rd 480

A

Result of mixing appropriate on a foam concentrate with water exist between proportioner and the nozzle or aerating device

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q 
 what two categories are class B fuels divided into
3rd 480
A

Hydrocarbon fuels

polar solvent fuels

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

define hydrocarbon fuel

3rd 481

A

petroleum based organic compound containing only hydrogen and carbon

Oil fuel oil gasoline benzene kerosene

specific gravity less than one will float on water

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

define polar solvent fuel

3rd 481

A

Liquid having a molecule where the positive negative charges are permanently separated resulting in their ability to ionize and solution and create electrical conductivity

Alcohol acetone ketones Esther’s

Mixes well with water

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

define miscible

3rd 481

A

Materials that are capable of being mixed and all proportions

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Class B hydrocarbon fuels that have been blended with 15% solvent additives like gasoline and ethanol should be treated as what
3rd 480

A

Polar solvents

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

in which three ways does foam extinguish and or suppress vapors
3rd 481

A

Separating - Barrier between fuel/fire
cooling - Lowers temp
suppressing/smothering vapors

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Most firefighting foam concentrates are formulated to mix with water at what percentages
3rd 482

A

.1% to 6%

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q 
At what percentage are class A foams typically proportioned
3rd 482
A

.1% to 1%

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

what four methods are used to proportion foam

3rd 482

A

education
injection
batch mixing
pre-mixing

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

define eduction proportioning

3rd 483

A

Pressure of a water stream drafts foam concentrate through use of an eductor by Venturi effect

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

define injection proportioning

3rd 483

A

External pump or head pressure forces from concentrate into fire stream at the correct ratio for flow desired

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

define batch mixing proportioning

3rd 483

A

Foam concentrate is poured directly into tank of water

simplest but most inaccurate method

used on class A foam

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

define premixing proportioning

3rd 484

A

Mixing pre-measured portions of water and foam in a container examples include extinguishers

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

name 4 methods for storing foam

3rd 484

A

Pails
barrels
totes
apparatus tanks

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

define pails storage containers of foam

3rd 485

A

5 gallons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

define barrel storage of foam

3rd 485

A

55 gallons industrial applications

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

define tote foam storage

3rd 485

A

275 gallon container box storage

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

what is the typical range of capacity for municipal fire apparatus foam tanks
3rd 485

A

20-200 gal

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q 
class A foam concentrate
3rd 486
A 
for use on class A fires
hydrocarbon-based surfactants which act as wetting agents. reducing the surface tension of water & allowing it to soak in better

20 year shelf life

.1% - 1% proportioning

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

define surfactant

A

chemical which lowers the surface tension of a liquid, making it spread more rapidly

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

Class A foam application rate range for overhaul

3rd 488

A

.2% - .5%

28
Q

Class A foam proportioning range for exposure protection

3rd 488

A

.5% - 1%

29
Q 
class A foam proportioning range with a air aspirating nozzle
3rd 488
A

.3% - .7%

30
Q 
class A proportioning range with CAFS
3rd 488
A

.2 - 5%

31
Q

define application rate

3rd 488

A

The minimum amount of foam solution must be applied to control the spread or extinguish the fire

32
Q 
what are three common application needs for class A foam
3rd 488
A

Areas requiring maximal penetration vertical surfaces

surfaces of fuels

33
Q 
What factors may affect the breakdown process of class A foam
3rd 488
A 
Heat of a fire
height of a flame
air temperature
wind conditions 
duration of the process
34
Q 
define synthetic class B foam
3rd 488
A

mixture of thorough surfactants and proteins derived from animals

35
Q 
what is the shelf life of class B protein based foam
488
A

10 years

36
Q 
what is the shelf life of synthetic class B foam
488
A

20-25 years

37
Q

True or false foam concentrates are the same type which have been manufactured by the US military may be mixed at any time with no adverse effects
489

A

true

38
Q 
class B foams are mixed and proportioned from one percent to what
490
A

1% - 6%

39
Q 
class B foam expansion is based on what 4 factors
490
A

Type of foam concentrate
accuracy proportioning
quality of concentrate
method of aeration

40
Q

NF PA 11 defines low expansion foam as what ratio

490

A

20:1

41
Q

NFPA 11 defines medium expansion foam at what ratio

490

A

20:1 - 200:1

42
Q

NFPA defines high expansion foam as having what ratio

490

A

200:1 - 1000:1

43
Q

In order to calculate the application rate available for my specific nozzle divide the flow rate by what
491

A

area of the fire

44
Q

define protein based foam concentrates

492

A

Concentrate consisting of proteins hydrolysate and additives prevents corrosion & bacterial decomposition

Less fluid then low expansion foams when applied fuel source

45
Q

define flouroprotein foam

492

A

concentrate is a combination of protein based and synthetic foams. the additives provide better flow & longer effectiveness of vapor suppression

46
Q

define aqueous film forming foam

492

A

Synthetic from concentrate when combined with water forms a vapor barrier for spills and fires. effective as an extinguishing agent, blanketing hydrocarbon fuels

47
Q

define alcohol resistant aqueous film forming foam concentrate
493

A

aqueous film forming foam designed to use on polar solvent  & hydrocarbons fuels

3-6%

1-6% hydrocarbon

48
Q

define high expansion foam

494

A 
Detergent based low water content less runoff minimizing water damage ideal for 
confined spaces
fixed extinguishing systems
class A fire application
1:1000 ratio
49
Q

what two mechanical methods are used to proportion foam

494

A

Venturi effect

pressurized proportioning devices

50
Q

What are three types of portable foam proportioner’s

A

In line eductor
foam hand nozzle eductor
self educting master stream nozzles

51
Q

While using an in-line eductor, the pressure at the discharge side must not exceed what percentage of the inlet pressure
495

A

70%

52
Q

define around the pump proportioner

498

A

Apparatus mounted foam proportioner in which a small quantity of water is diverted from the Apparatus pump through an in-line proportioner picking up the foam

most common apparatus mounted foam proportioner in-service

53
Q

define bypass type balanced pressure proportioner

499

A

proportioner that operates in tandem with a fire water pump to ensure proper foam concentrate to water mixture

One of the most accurate
used on large mobile apparatus

54
Q

define variable flow variable rate direct injection system

500

A

System that injects the correct amount of foam into the pump piping thereby supplying all discharges with foam system automatically monitors and operates the hose lines to maintain consistent quality of foam solution

55
Q

define variable flow demand type balanced pressure proportioner
500

A

Proportionally system that is using both fixed and mobile applications it has variable speed mechanism driving the foam pump and automatically monitors the flow of foam to produce an affective foam solution

56
Q

Define batch mixing

A

simplest method
operator pours appropriate amount of concentrate directly into water tank

generally for class A foams only
once call completed,flush entire tank
57
Q

High energy foam generating system/CAFS

A

compressed air introduced to foam solution prior to discharge turbulence created by it creates finished foam

.1% - 1%

longer stream reach durable uniformed bubbles finished product adheres better, longer hose lines & weighs less

higher costs additional training hose easier kink


58
Q 
for safety reasons, When flowing class A foam - Nozzle flow rate should be what
503
A

The same as for plain water

59
Q

Low expansion foam may be delivered by what

A

Handline nozzles or master stream nozzles

60
Q

Smoothbore Nozzles are limited to what type of foam

504

A

Class A foam from CAFS

61
Q

Fog nozzles are not an acceptable choice for delivering what type of foam
504

A

Fluoroprotein foams or on Incidences involving polar solvents

62
Q

Air aspirating foam nozzles are the only nozzles that should be used with what type of concentrates
504

A

Protein and fluoroprotein concentrates

63
Q

Direct application foam technique

506

A

Method of fire attack with class A foam. consists of applying finished foam directly onto burning material

64
Q

Roll on method of foam application technique

506

A

Method used for applying class B foam Directing stream on ground near edge of burning liquid spill ideal for use on pool of liquid on open ground

65
Q

Bank down method for applying foam

506

A

To be employed with class B foam when a vertical surface is near or within a pool of liquid

66
Q

rain down method of foam application

506

A

When roll-on or bank down method are not practical due to elevation of fuel above grade rain down method they be employed most common method

67
Q

NFPA 1150

A

Standard on foam chemicals for fire in class A fuels

Apperatus Tech Test (44 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions