Extinguishers

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With respect to Fuels ordinary combustible materials include

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Wood and paper

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All portable extinguishers are classified according to their

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Intended use

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A dry chemical extinguisher rated 60-B is capable of extinguishing a

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60 ft2 flammable liquid pan fire

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What Advantage does CO2 have over a dry chemical extinguisher

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CO2 does not leave a residue or corrode electrical contacts

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Extinguishing agent safe for use on fires in or near energized electrical equipment include

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Carbon dioxide and dry chemical

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How much water is required for a fire extinguisher to receive a 2-A rating

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2 1/2 gallons

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When approaching a fire, stored- pressure water extinguishers are designed to be discharged with the nozzle aimed at the

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Base of the fire

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A blue circle with a letter designation in the center would indicate and extinguisher is rated for use on

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Class C Fires

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Class B fires involve fuels such as

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Flammable liquids

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A green triangle containing a letter would indicate and extinguisher to be used on a

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Class A fire

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Energized electrical equipment in the surrounding area have to be protected with extinguishers that has a

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Class C rating

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Extinguishers suitable for class A fire's can be identified by a what containing the letter A. If colored it should be

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Triangle green

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A stored pressure water extinguisher should be chosen to attack a

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Class A fire

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The preferred method of applying dry chemical agents to flammable liquid spill fires is to

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Direct the stream at the base of the fire using a sweeping motion

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Carbon dioxide extinguishers are generally rated for

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Class B and C Fires

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An electric motor fire is best extinguished by using CO2 because it

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Leaves no residue

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Extinguishers suitable for class B fires can be identified by a what containing the letter B

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Red Square

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Extinguishers suitable for Class C Fires can be identified by a what containing the letter C

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Blue circle

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A multipurpose dry chemical extinguisher is rated for class

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A B and C Fires

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The proper type of extinguisher for a fire involving magnesium Titanium or sodium is

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Dry powder

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A Class D fire involves

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Combustible metals

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Fire involving flammable liquids and gases where applied foam and dry chemical agents will be needed or

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Class B fires

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Extinguishers suitable for class D fires can be identified by a what containing the letter D

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Yellow star

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Fires involving combustible Metals such as magnesium titanium zirconium sodium and potassium are

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Class D fires

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A carbon dioxide CO2 extinguishers means of discharge is

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Stored liquefied Compressed Gas

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A pump tank extinguisher rated as 4-A can be expected to extinguish approximately

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Twice as much fire as one rated 2-A

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A dry chemical fire extinguisher rated as 10-B should be capable of extinguishing

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10 times as much fire as a unit rated as 1B

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Dry powder extinguishers are rated for use on

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Class D fires

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What extinguisher may be required to extinguish a restaurant kitchen fire involving fryers

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Type K

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Class C Fires involve

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Energized electrical equipment

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One method fire extinguishers extinguish is by

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Cooling

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Halon fire extinguishers are primarily designed for use on

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Class B and C Fires

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Which type of portable fire extinguisher is least likely to expose the operator to electrical shock

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Dry chemical

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AFFF Aqueous film forming foam extinguishers are suitable for use on

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Class A and B fires

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Prior to squeezing the handle of a dry chemical fire extinguisher the nozzle should be aimed

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At the base of the fire

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Injury that could occur by placing your hand on the Horn of a CO2 extinguisher before discharge

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Shock

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It is dangerous to apply a stream of water to energized electrical equipment because

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Water can conduct electricity back to the extinguisher

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How many basic steps is there to operate a fire extinguisher

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4

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Class C Fires can be extinguished using

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Multi-purpose dry chemicals

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What factors should be considered When selecting a fire extinguisher

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The fuel

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Fire extinguishers should be inspected

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Once a year

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The greatest concern associated with selecting too small of an extinguisher is that

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The operator has to get closer to the fire

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Gases that do not conduct electricity or leave a residue and or non-volatile are

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Clean agents

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What extinguishing agent damages the ozone layer

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Halon

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What is the relationship between dry powder and dry chemical extinguisher agents

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They are entirely different substances with entirely different applications

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What does the acronym PASS mean

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Pull, Aim, Squeeze, sweep

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Pump tank extinguishers are used to apply

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Water

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Water type extinguishers exposed to weather below 40 degrees require what to be added

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Antifreeze

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A loaded stream fire extinguisher

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Prevent freezing by adding a anti-freezing agent

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AFFF portable fire extinguishers use what means for expelling their contents. Aqueous film forming foam

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Compressed air

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A phenomenon that occurs when mixtures of alkaline base chemicals and certain cooking oils come into contact resulting in the formation of a soapy film is called

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Saponification

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The term for water soluble flammable liquids such as alcohols acetone and others

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Polar solvents

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The reason I fire extinguisher class icon would have a slash through it is because

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Using the extinguisher on that class of fire would create additional risk

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Dry chemical extinguishers can be used on Class C Fires because dry chemicals

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Do not conduct electricity

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Water Mist fire extinguishers are safe to use on energized electrical equipment because the water than use is

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Deionized

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Fire extinguishers that are most effective or static pools of flammable liquids

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Aqueous film forming foam. AFFF extinguishers

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The two basic designs for handheld dry chemical extinguishers

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Cartridge and stored pressure

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Halogenated agents extinguish a fire by

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Interrupting chain reaction

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When it comes to fire extinguishers and combustible metals

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No single agent will control or extinguish fires in all combustible metals

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The organization charged with independently testing and certifying fire extinguishers is

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Underwriters Laboratories UL

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What extinguishing agent interferes with the chemical chain reaction and terminates the combustion process

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Halon replacement agents

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How should an extinguisher with a sixth nozzle be carried When approaching a fire

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In the favored hand

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Best position to attack a fire with a portable extinguisher

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Upwind with an exit behind you

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AFFF distinguishing agents are applicable for both

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Class A and B fires

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When applying dry powder to a Class D fire the operator will need to

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Use large amounts of dry powder to completely cover the burning material