Essentials Of Firefighting Chapter 7 Portable Fire Extinguishers

Front 1

Class A fires involve ______________

Back 1

Ordinary Combustibles

341

Front 2

Class B fires involve _______________

Back 2

Flammable and Combustible liquids and Gases

341

Front 3

Class C fires involve ________________

Back 3

Energized electrical equipment

341

Front 4

Class D fires involve ___________________

Back 4

Combustible Metals and Alloys

341

Front 5

Class K fires involve ________________

Back 5

Combustible cooking oils

342

Front 6

What type of fire involves combustibles such as textiles, paper, plastic, rubber and wood

Back 6

Class A

341

Front 7

What are the 3 ways to extinguish a Class A fire?

Back 7

1) Water

2) Water-Based Agents (Class A Foam)

3) Dry Chemicals

341

Front 8

What type of fire involves combustibles such as alcohol, gasoline, lube oils and liquified petroleum gas?

Back 8

Class B

341

Front 9

What are the 3 agents used to extinguish class B fires?

Back 9

1) Carbon Dioxide

2) Dry Chemical

3) Class B Foam

341

Front 10

Because _______ and _______-based agents will conduct electricity, they cannot be used on Class C fires

Back 10

Water

341

Front 11

Class C agents will __________ electricity, making them suitable for electrical fires

Back 11

NOT Conduct

341

Front 12

Once the power has been disconnected for a Class C fire, the fire can be treated as ___________

Back 12

Class A or B fire

341

Front 13

This type of fire involves combustibles such as lithium, potassium, and sodium

Back 13

Class D

341

Front 14

How can Class D fires be identified during the combustion process?

Back 14

Bright white emissions

341

Front 15

What extinguishing agent will cause a Class D fire to react violently?

Back 15

Water or Water-Based Agents

341

Front 16

Extinguishing agent suitable for use on combustible metal fires

Back 16

Dry Powder

341

Front 17

Dry chemical agents such as sodium and potassium bicarbonate will react violently with burning metal if applied to a Class __ fire

Back 17

Class D

341

Front 18

Vegetable or animal fatsand oils that burn t extremely high temperatures are Class ___ fires

Back 18

Class K

342

Front 19

Where are most class K fuels found?

Back 19

-Commercial and institutional kitchens

-Industrial cooking facilities

-Private homes (occasionally)

342

Front 20

These extinguishing systems are usually installed in range hoods and associated ducting where grease may accumulate

Back 20

Wet Chemical System

Front 21

What are 2 types of extinguishing systems that can be used to control Class K fires?

Back 21

1) Wet Chemical Systems

2) Portable Fire Extinguishers

342

Front 22

Any substance used for the purpose of controlling or extinguishing a fire?

Back 22

Extinguishing Agent

342

Front 23

Excluding oxygen from the burning process

Back 23

Smothering

342

Front 24

Reducing the burning material below its ignition temperature

Back 24

Cooling

342

Front 25

Interrupting the chemical chain reaction in the burning process

Back 25

Chain breaking

342

Front 26

Forming an oxygen-excluding soapy foam surface

Back 26

Saponification

342

Front 27

Extinguishing agents that work by smothering are ineffective on materials that contain their own ______________ agent

Back 27

Oxidizing agent

342

Front 28

The primary method of extinguishment for Carbon Dioxide

Back 28

Oxygen Depletion

342

Front 29

The primary method of extinguishment for Clean Agent

Back 29

Chain Inhibition

342

Front 30

The primary method of extinguishment for Dry Chemical

Back 30

Chain Inhibition

342

Front 31

The primary method of extinguishment for Dry Powder?

Back 31

Oxygen Depletion

342

Front 32

The primary method of extinguishment for Wet Chemical?

Back 32

Oxygen Depletion

342

Front 33

The primary method of extinguishment for Foam?

Back 33

Oxygen Depletion

342

Front 34

Which 2 extinguishing agents can also act as Vapor Suppressors?

Back 34

1) Foam

2) Wet Chemical

342

Front 35

Water type extinguishers should be protected against freezing if they are going to be exposed to temperatures lower than ___ degrees

Back 35

40 Degrees

342

Front 36

Portable type fire extinguisher where the operator physically applies pressure to a pump that increases pressure within the container

Back 36

Manual Pump

343

Front 37

Portable type fire extinguisher with compressed air or inert gas within the container forces the agent out of a nozzle at the end of a hose

Back 37

Stored Pressure

343

Front 38

Portable type fire extinguisher where compressed inert gas is contained in a separate cartridge on the side of the container

Back 38

Pressure Cartridge

343

Front 39

_______ type water extinguishers are primary for use on ground cover fires or small class A fires

A. Stored-Pressure

B. Pump Type

C. Dry Powder

D. Clean Agent

Back 39

B. Pump Type

345

Front 40

_______ water extinguishers are useful for all types of small Class A fires

A. Stored Pressure

B. Pump Type

C. Clean Agent

D. Dry Powder

Back 40

A. Stored Pressure

345

Front 41

The water in stored pressure water extinguishers is stored in a tank along with either ___________ air or ___________

Back 41

Compressed Air or Nitrogen

346

Front 42

Class _____________ in water enhances its effectiveness by reducing the surface tension of water, allowing the water to quickly penetrate the surface

Back 42

Class A Foam Concentrate

346

Front 43

Class A Foam Concentrate is sometimes added to two types of fire extinguishers to increase their effectiveness

Back 43

1)Pump-type

2)Stored-pressure

346

Front 44

What kind of water is used in water-mist extinguishers?

Back 44

Deionized Water

346

Front 45

What makes water electrically conductive?

Back 45

The impurities

346

Front 46

Deionized water is safe to use on ____________ equipment

Back 46

Energized Electrical

346

Front 47

In saponification, the wet chemical agent combines with the _______ to create a soapy foam surface over the cooking appliance

Back 47

Oils

346

Front 48

Aqueous Film Forming Foam extinguishers are intended for Class __ fires

Back 48

Class B

346

Front 49

This type of extinguisher is useful in combating fires in or suppressing vapors from small liquid fuel spills

Back 49

AFFF

346

Front 50

_________ extinguishers, when used, create a vapor seal that prevents reignition

Back 50

AFFF

346

Front 51

How should the AFFF be applied?

Back 51

It should be allowed to either gently rain down onto the fuel surface or deflect of a nearby object or surface

346

Front 52

What classes of fire are AFFF extinguishers not suitable for?

Back 52

Class C, D and K fuels

347

Front 53

What are AFFF most effective on?

Back 53

On static pools of flammable liquids

347

Front 54

______ is corrosive and can remove paint from tools and apparatus

Back 54

AFFF

347

Front 55

_________ have been developed to replace halongenated extinguishing agents

Back 55

Clean Agents

347

Front 56

Clean agents cool and smother fires in Class __ and ___ fuels, and the agents can also be used on Class __ fires because they are nonconductive

Back 56

Class A, B and C

347

Front 57

A ___________ extinguisher leaves no residue and is effective against Class A-B-C fires

Back 57

Clean Agent

347

Front 58

Portable ___________ fire extinguishers are found in handheld and portable wheeled units

Back 58

Carbon Dioxide

348

Front 59

Carbon Dioxide extinguishers are most effective on Class __ and __ fires

Back 59

Class B and C

348

Front 60

________ extinguishers have limited reach and the gas can be dispersed by the wind

Back 60

Carbon Dioxide

348

Front 61

How is Carbon Dioxide stored under?

Back 61

Under its own pressure

348

Front 62

When released, _________ gas displaces available oxygen and smothers the fire

Back 62

Carbon Dioxide

348

Front 63

What is always a possible danger when using Carbon Dioxide extinguishers?

Back 63

Reignition

Front 64

Carbon dioxide has little if any _______ effects on the fire

Back 64

Cooling

Front 65

When carbon dioxide is discharged, what builds up on the discharge horn?

Back 65

Electrical Charge

348

Front 66

Two types of Dry Chemical Agents

1. Regular _:_ rated

2. Multipurpose and _:_:_ rated

Back 66

1. Regular B:C

2. Multipurpose A:B:C rated

348

Front 67

A constant pressure of about _____ psi is maintained in the gent storage tank

Back 67

200

349

Front 68

Cartridge operated and Stored Pressure extinguishers use either ____________ or ___________ as the pressurizing gas

Back 68

Nitrogen or Carbon Dioxide

349

Front 69

No single extinguishing agent will control or extinguish fires in all _____________

Back 69

Combustible Metals

350

Front 70

Class D dry powder must be applied in sufficient depth to completely cover the burning area in order to create a ________________

Back 70

Smothering Blanket

350

Front 71

Class A ratings run from 1-A to ___-A

Back 71

1A - 40A

Front 72

Class B ratings run from 1-B to ____-B

Back 72

1-B - 640-B

Front 73

How are portable extinguishers classified?

Back 73

According to types of fire which they are intended

351

Front 74

Class B ratings are based on the approximate ____________ area of a flammable liquid fire that a non expert operator can extinguish using one full extinguisher

Back 74

Square Foot

352

Front 75

The Class C rating confirms that the extinguishing agent will not __________________

Back 75

Conduct electricity

352

Front 76

There are not any fire extinguishing capability tests specifically conducted for Class __ ratings

Back 76

Class C

352

Front 77

When an extinguishing agent is determined to be safe and effective for use on a combustible metal, the application instructions are included where on the extinguisher?

Back 77

On the faceplate of the extinguisher

352

Front 78

Class ___ agents cannot be given a rating for use on other classes of fire

Back 78

Class D Agents

Front 79

What are the 3 most common combinations of letters on fire extinguishers?

Back 79

1) Class A-B-C

2) Class A-B

3) Class B-C

Front 80

Class A shape and color

Back 80

Green Triangle

Front 81

Class B shape and color

Back 81

Red Square

Front 82

Class C shape and color

Back 82

Blue CIrcle

Front 83

Class D shape and color

Back 83

Yellow Star

Front 84

Class K shape and color

Back 84

Black Hexagon

Front 85

Do not select ___________ extinguishers for use in areas where highly sensitive computer equipment is located

Back 85

Dry Chemical

Front 86

Why is inspecting the extinguisher before using it necessary?

Back 86

To ensure it is charged and operable

Front 87

What are the 4 things to inspect for on the extinguisher before using it?

Back 87

1) External condition

2) Hose/ nozzle

3) Weight

4) Pressure Gauge

Front 88

From what side should the fire be approached?

Back 88

Windward side

Front 89

PASS application method

Back 89

Pull the pin

Aim the nozzle at the base of fire

Squeeze the handles together

Sweep the nozzle back and forth

Front 90

What should you do if extinguishment has not been achieved after using an entire extinguisher?

Back 90

Withdraw and reassess the situation

Front 91

How should empty extinguisher be placed after their use?

Back 91

Laid on there side

Front 92

How often should fire extinguishers be inspected?

Back 92

At least once a year

Front 93

What are 3 factors that determine the value of a fire extinguisher?

Back 93

1) Serviceability

2) Accessibility

3) Simplicity of operation

Front 94

How often should the portable extinguisher on the apparatus be inspected?

Back 94

At the beginning of each work period or at least weekly

Front 95

If an extinguisher is found to be deficient by __ percent it should be removed from service and replaced

Back 95

10 percent

Front 96

Who should repair or refill portable fire extinguishers?

Back 96

Only trained personnel

Front 97

Do not remove the safety pin of the extinguisher until __________

Back 97

Until you are ready to use the extinguisher

Front 98

How often should dry chemicals be shaken to loosed the agent and prevent it from settling?

Back 98

Monthly

Front 99

How often should the extinguisher be cleaned?

Back 99

After each use or periodically

Front 100

Every ________ the dry chemical extinguishing agent should be emptied and the extinguisher refilled

Back 100

6 years

Front 101

Where should the extinguisher be emptied to prevent the agent from spreading through the area

Back 101

In a controlled atmosphere

Front 102

Extinguishers laid on there sides indicate what?

Back 102

They are out of service