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102 Cards in this Set
- Front
- Back
Class A fires involve ______________ |
Ordinary Combustibles
341 |
|
Class B fires involve _______________ |
Flammable and Combustible liquids and Gases
341 |
|
Class C fires involve ________________ |
Energized electrical equipment
341 |
|
Class D fires involve ___________________ |
Combustible Metals and Alloys
341 |
|
Class K fires involve ________________ |
Combustible cooking oils
342 |
|
What type of fire involves combustibles such as textiles, paper, plastic, rubber and wood |
Class A
341 |
|
What are the 3 ways to extinguish a Class A fire? |
1) Water 2) Water-Based Agents (Class A Foam) 3) Dry Chemicals
341 |
|
What type of fire involves combustibles such as alcohol, gasoline, lube oils and liquified petroleum gas? |
Class B
341 |
|
What are the 3 agents used to extinguish class B fires? |
1) Carbon Dioxide 2) Dry Chemical 3) Class B Foam
341 |
|
Because _______ and _______-based agents will conduct electricity, they cannot be used on Class C fires |
Water
341 |
|
Class C agents will __________ electricity, making them suitable for electrical fires |
NOT Conduct
341 |
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Once the power has been disconnected for a Class C fire, the fire can be treated as ___________ |
Class A or B fire
341 |
|
This type of fire involves combustibles such as lithium, potassium, and sodium |
Class D
341 |
|
How can Class D fires be identified during the combustion process? |
Bright white emissions
341 |
|
What extinguishing agent will cause a Class D fire to react violently? |
Water or Water-Based Agents
341 |
|
Extinguishing agent suitable for use on combustible metal fires |
Dry Powder
341 |
|
Dry chemical agents such as sodium and potassium bicarbonate will react violently with burning metal if applied to a Class __ fire |
Class D
341 |
|
Vegetable or animal fatsand oils that burn t extremely high temperatures are Class ___ fires |
Class K
342 |
|
Where are most class K fuels found? |
-Commercial and institutional kitchens -Industrial cooking facilities -Private homes (occasionally)
342 |
|
These extinguishing systems are usually installed in range hoods and associated ducting where grease may accumulate |
Wet Chemical System |
|
What are 2 types of extinguishing systems that can be used to control Class K fires? |
1) Wet Chemical Systems 2) Portable Fire Extinguishers
342 |
|
Any substance used for the purpose of controlling or extinguishing a fire? |
Extinguishing Agent
342 |
|
Excluding oxygen from the burning process |
Smothering
342 |
|
Reducing the burning material below its ignition temperature |
Cooling
342 |
|
Interrupting the chemical chain reaction in the burning process |
Chain breaking
342 |
|
Forming an oxygen-excluding soapy foam surface |
Saponification
342 |
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Extinguishing agents that work by smothering are ineffective on materials that contain their own ______________ agent |
Oxidizing agent
342 |
|
The primary method of extinguishment for Carbon Dioxide |
Oxygen Depletion
342 |
|
The primary method of extinguishment for Clean Agent |
Chain Inhibition
342 |
|
The primary method of extinguishment for Dry Chemical |
Chain Inhibition
342 |
|
The primary method of extinguishment for Dry Powder? |
Oxygen Depletion
342 |
|
The primary method of extinguishment for Wet Chemical? |
Oxygen Depletion
342 |
|
The primary method of extinguishment for Foam? |
Oxygen Depletion
342 |
|
Which 2 extinguishing agents can also act as Vapor Suppressors? |
1) Foam 2) Wet Chemical
342 |
|
Water type extinguishers should be protected against freezing if they are going to be exposed to temperatures lower than ___ degrees |
40 Degrees
342 |
|
Portable type fire extinguisher where the operator physically applies pressure to a pump that increases pressure within the container |
Manual Pump
343 |
|
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 |
Stored Pressure
343 |
|
Portable type fire extinguisher where compressed inert gas is contained in a separate cartridge on the side of the container |
Pressure Cartridge
343 |
|
_______ 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 |
B. Pump Type
345 |
|
_______ water extinguishers are useful for all types of small Class A fires
A. Stored Pressure B. Pump Type C. Clean Agent D. Dry Powder |
A. Stored Pressure
345 |
|
The water in stored pressure water extinguishers is stored in a tank along with either ___________ air or ___________ |
Compressed Air or Nitrogen
346 |
|
Class _____________ in water enhances its effectiveness by reducing the surface tension of water, allowing the water to quickly penetrate the surface |
Class A Foam Concentrate
346 |
|
Class A Foam Concentrate is sometimes added to two types of fire extinguishers to increase their effectiveness |
1)Pump-type 2)Stored-pressure
346 |
|
What kind of water is used in water-mist extinguishers? |
Deionized Water
346 |
|
What makes water electrically conductive? |
The impurities
346 |
|
Deionized water is safe to use on ____________ equipment |
Energized Electrical
346 |
|
In saponification, the wet chemical agent combines with the _______ to create a soapy foam surface over the cooking appliance |
Oils
346 |
|
Aqueous Film Forming Foam extinguishers are intended for Class __ fires |
Class B
346 |
|
This type of extinguisher is useful in combating fires in or suppressing vapors from small liquid fuel spills |
AFFF
346 |
|
_________ extinguishers, when used, create a vapor seal that prevents reignition |
AFFF
346 |
|
How should the AFFF be applied? |
It should be allowed to either gently rain down onto the fuel surface or deflect of a nearby object or surface
346 |
|
What classes of fire are AFFF extinguishers not suitable for? |
Class C, D and K fuels
347 |
|
What are AFFF most effective on? |
On static pools of flammable liquids
347 |
|
______ is corrosive and can remove paint from tools and apparatus |
AFFF
347 |
|
_________ have been developed to replace halongenated extinguishing agents |
Clean Agents
347 |
|
Clean agents cool and smother fires in Class __ and ___ fuels, and the agents can also be used on Class __ fires because they are nonconductive |
Class A, B and C
347 |
|
A ___________ extinguisher leaves no residue and is effective against Class A-B-C fires |
Clean Agent
347 |
|
Portable ___________ fire extinguishers are found in handheld and portable wheeled units |
Carbon Dioxide
348 |
|
Carbon Dioxide extinguishers are most effective on Class __ and __ fires |
Class B and C
348 |
|
________ extinguishers have limited reach and the gas can be dispersed by the wind |
Carbon Dioxide
348 |
|
How is Carbon Dioxide stored under? |
Under its own pressure
348 |
|
When released, _________ gas displaces available oxygen and smothers the fire |
Carbon Dioxide
348 |
|
What is always a possible danger when using Carbon Dioxide extinguishers? |
Reignition |
|
Carbon dioxide has little if any _______ effects on the fire |
Cooling |
|
When carbon dioxide is discharged, what builds up on the discharge horn? |
Electrical Charge
348 |
|
Two types of Dry Chemical Agents
1. Regular _:_ rated 2. Multipurpose and _:_:_ rated
|
1. Regular B:C 2. Multipurpose A:B:C rated
348 |
|
A constant pressure of about _____ psi is maintained in the gent storage tank |
200
349 |
|
Cartridge operated and Stored Pressure extinguishers use either ____________ or ___________ as the pressurizing gas |
Nitrogen or Carbon Dioxide
349 |
|
No single extinguishing agent will control or extinguish fires in all _____________ |
Combustible Metals
350 |
|
Class D dry powder must be applied in sufficient depth to completely cover the burning area in order to create a ________________ |
Smothering Blanket
350 |
|
Class A ratings run from 1-A to ___-A |
1A - 40A |
|
Class B ratings run from 1-B to ____-B |
1-B - 640-B |
|
How are portable extinguishers classified? |
According to types of fire which they are intended
351 |
|
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 |
Square Foot
352 |
|
The Class C rating confirms that the extinguishing agent will not __________________ |
Conduct electricity
352 |
|
There are not any fire extinguishing capability tests specifically conducted for Class __ ratings |
Class C
352 |
|
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? |
On the faceplate of the extinguisher
352 |
|
Class ___ agents cannot be given a rating for use on other classes of fire |
Class D Agents |
|
What are the 3 most common combinations of letters on fire extinguishers? |
1) Class A-B-C 2) Class A-B 3) Class B-C |
|
Class A shape and color |
Green Triangle |
|
Class B shape and color |
Red Square |
|
Class C shape and color |
Blue CIrcle |
|
Class D shape and color |
Yellow Star |
|
Class K shape and color |
Black Hexagon |
|
Do not select ___________ extinguishers for use in areas where highly sensitive computer equipment is located |
Dry Chemical |
|
Why is inspecting the extinguisher before using it necessary? |
To ensure it is charged and operable |
|
What are the 4 things to inspect for on the extinguisher before using it? |
1) External condition 2) Hose/ nozzle 3) Weight 4) Pressure Gauge |
|
From what side should the fire be approached? |
Windward side |
|
PASS application method |
Pull the pin
Aim the nozzle at the base of fire
Squeeze the handles together
Sweep the nozzle back and forth |
|
What should you do if extinguishment has not been achieved after using an entire extinguisher? |
Withdraw and reassess the situation |
|
How should empty extinguisher be placed after their use? |
Laid on there side |
|
How often should fire extinguishers be inspected? |
At least once a year |
|
What are 3 factors that determine the value of a fire extinguisher? |
1) Serviceability 2) Accessibility 3) Simplicity of operation |
|
How often should the portable extinguisher on the apparatus be inspected? |
At the beginning of each work period or at least weekly |
|
If an extinguisher is found to be deficient by __ percent it should be removed from service and replaced |
10 percent |
|
Who should repair or refill portable fire extinguishers? |
Only trained personnel |
|
Do not remove the safety pin of the extinguisher until __________ |
Until you are ready to use the extinguisher |
|
How often should dry chemicals be shaken to loosed the agent and prevent it from settling? |
Monthly |
|
How often should the extinguisher be cleaned? |
After each use or periodically |
|
Every ________ the dry chemical extinguishing agent should be emptied and the extinguisher refilled |
6 years |
|
Where should the extinguisher be emptied to prevent the agent from spreading through the area |
In a controlled atmosphere |
|
Extinguishers laid on there sides indicate what? |
They are out of service |