A Colorless, Odorless, Electrically non- conductive inert gas that is a suitable medium for extinguishing class B &C Fires
Dry Chemical / Definition
A powder composed of very small particles, usually sodium bicarbonate-, potassium bicarbonate
What is the Definition of Wet Chemical?
Normally an aqueous solution of organic or inorganic salt.
What are the two Extinguisher Chemicals
Wet and Dry
What are the two Closed Recovery Systems
Dry and Halogenated
Dry Chemical Closed Recovery System
A system is constructed in a manner that does not introduce foreign material into the recovered agent and has a means of visually inspecting the recovered agent for contaminants.
Halogenated Closed Recovery System
A system that provides for the transfer of halogenated agents between fire extinguishers, supply containers, and recharge and recovery containers so that none of the halogenated agents escapes to the atmosphere
What are the two types of Cylinders?
High & Low-Pressure Cylinders
High-Pressure Cylinder
Cylinders or Cartridges containing nitrogen, compressed air, carbon dioxide, or other gases at a presser higher than 500 psi at 70 Degrees
Low-Pressure Cylinder
A Cylinder containing a fire extinguishing agent (medium), nitrogen compressed air, or other compressed gases at a service pressure of 500 psi or at70 degrees
What is an Ordinary combustibles extinguisher
Class "A" extinguisher
Flammable and combustible liquids and gases extinguisher?
Class "B" extinguisher
Electrical extinguisher?
Class "C" extinguisher
Combustible metals extinguisher?
Class "D" extinguisher
Kitchen extinguisher?
Class "K" extinguisher
What is the color rating of a D Class fire extinguisher?
Yellow
Aqueous film foaming foam extinguishers are suitable for use on Class ___ and Class ___ fires.
A;B
CO2 extinguishers are effective in extinguishing Class ___ and Class___ fires
B;C
A Sodium Bicarbonate extinguisher is a ____ type of fire extinguisher
Dry Chemical
Class ___ agents cannot be given multi-purpose ratings for use in other classes.
D
Dry powder agents are for Class ____ fires only
D
NFPA ___, the Standard for portable fire extinguishers, provides information on the rating, placement, and use of portable extinguishers
10
The mixing of ____ and water results in a vapor seal by creating a film foam on the surface of the water. The vapor seal extinguishes the flame and prevents reignition
AFFF
AFFF extinguishers do not work well for fires in Class ____ or Class___ fuels
C;D
Which extinguishers are most commonly used for highly sensitive computer equipment Halon ;
Carbon Dioxide
If an extinguisher is found to be deficient in weight by ___% it should be removed from service and replaced
10%
What is an Extinguisher Inspection?
A quick check that a fire extinguisher is in its designated place, that it has not been actuated or tampered with, and that there is no obvious physical damage or condition to prevent its operation.
Define Extinguisher Maintenance
A thorough examination of the fire extinguisher. It includes a thorough examination for physical damage or condition to prevent its operation and any necessary repair or replacement. It will normally reveal if hydrostatic testing or internal maintenance is required.
What is AFFF?
Aqueous Forming Foam Agent
What is FFFP?
Film-Forming Fluoroprotein Foam
What are the two Halogenated Agents?
Halocarbons, Halons
What are Halocarbon Agents?
Halocarbon agents include hydro-chlorofluorocarbon (HCFC), hydrofluorocarbon (HFC), perfluorocarbon (PFC), and fluorocarbon (FIC) types of agents.
What is Halon?
Halons include:
bromochlorodifluoromethane (Halon 1211),
bromotrifluoromethane (Halon 1301),
and mixtures of Halon 1211 and Halon 1301.
What is Hydrostatic Testing?
Pressure testing of the extinguisher to verify its strength against unwanted rupture.
What is the ICC?
The Interstate Commerce Commission had jurisdiction over high-pressure cylinders and cartridges prior to 1967.
What are the 5 classifications of fire?
Class A, B, C, D, K
at the class of foam will reduce the surface tension of water?
Class A foam
What class of fires are dry powder extinguishers rated for?
Class D only
How do carbon dioxide extinguishers work?
By displacing oxygen
How is the effectiveness of a class D extinguisher expressed?
There is no numerical rating of a class D system
How to perform the bank down application method
Apply foam off a solid surface to deflect down onto the fire
A yellow star symbolizes what class of fire extinguisher?
Class D
The expansion rate of High Expansion foam
1000:1
Oxygen exclusion is called...
Smothering
What agent is most effective on class B fires?
Foam
How often should extinguishers be serviced?
Annually or after each use
What is the numerical range of rating for class A extinguishers?
1A to 40A
What classes of extinguishers use numerical ratings?
Class A and B only
The numerical ratings on Class A and Class B ext. show:
the relative extinguishing effectiveness
Multipurpose-rated extinguishers are used for what class fires?
Class A, B, & C
What label types does NFPA require on extinguishers?
Pictographs
The expansion rate of Medium Expansion foam
200:1
If halon extinguishers weigh less than 9 lbs, what class of fire is it used for?
Class B & C
Dry chemical extinguishers are rated for what class fire?
Class B & C
Examples of obsolete extinguishers
Internal cartridge, water type, Carbon tetrachloride
What type of cartridge should an extinguisher have where freezing is possible?
Nitrogen Cartridge
What does a rating of 20B mean?
it extinguishers 20 sq ft of a class B fire
What is important requirement for a class C-rated extinguisher?
Should not conduct electricity
3 considerations for inspecting extinguishers
Accessibility, serviceability, simplicity of use
Foam that reduces the surface tension of water is good for what class of fire?
Class A
When an extinguisher empties during use, what should be done?
Withdraw & recharged
How much of a liquid does an extinguisher of 1A contain?
1 1/4 gallons of water
True or false: Ext. are intended for limited-size fires and are required even if there is sprinklers, stand-pipe hose, or other fixed equipment.
True
The fire ext. will be clearly marked with:
whether they meet or exceed:
-listing and labeling organization
-fire test
-performance standard for that ext.
Light (low) Hazard
A location with a low amount of Class A combustible material or items is arranged so the fire will not spread rapidly and Class B are found in low amounts and in closed containers
Ordinary (Moderate) Hazard
locations where Class A combustibles and Class B flammables are in a higher amounts than Low Hazards
Extra (high) Hazards
locations where Class A combustibles and Class B flammables are above the amount of the Ordinary Hazards
Obsolete ext.
Soda Acid
Chemical Foam (film-foaming agents)
Vaporized Liquid (e.g. carbon tetrachloride)
Cartridge-Operated water
Cartridge-Operated loaded steam
Copper or Brass shell joined by soft solder or rivets
Carbon Dioxide ext. with metal horns
Solid charged-type AFFF ext. (paper cartridge)
The extinguisher should ever be _______ and in larges rooms, they should have _______.
obstructed from view
something to indicate the location where the obstruction can not be avoided
Ext. having a weight not exceeding _____ and should be installed no more than _____ above the floor.
40 lbs.
5 ft
Ext. having a weight exceeding _____ and should be installed no more than _____ above the floor
40 lbs.
3.5 ft
Clearance between the the floor and extinguisher should be no less than ____.
4 in.
Ext. operating instructions are located:
on the front
Labels that should not be on the front are
Hazardous Material Identification System (HMIS)
Six-year maintenance
hydrostatic test
Other Misc.
Ext. this information on it
Material Safety Data Sheet (MSDS)
HMIS
List of hazardous materials in excess of 1%
Lists of chemicals in excess of 5%
Information on why an item is hazardous
Manufactures Name, address, and number
mild steel shell
All steel shells other than stainless steel and steel shells used for high-pressure cylinders
Extinguisher Service Pressure
the normal operating pressure as specified on the cylinder
Factory Test Pressure
tested pressure of the cylinder at the time of manufacturing
Recharging
replacement of the agent
Servicing
maintenance
recharging
hydrostatic testing
Examples of wet chemicals
Water
Potassium acetate
Potassium carbonate
Potassium Citrate
The placard should be by an ext. stating if:
fire protection system will be activated prior to using the ext,
Required building protection will be provided by
Class A ext.
Fire ext are provided for the protection of:
Building structure
occupancy hazardous within
Buildings with occupancy hazards subject to class B or Class C will have
Class A ext.
Class B or Class C ext.
Light hazards require
Class 2-A ext. 75 ft distance
Class 5-B - 10-B ext. 30 - 50 ft distance
Ordinary hazards require
Class 2-A ext. 75 ft distance
Class 10-B - 20-B ext. 30 - 50 ft distance
Extra hazard occupancy requires:
Minimum Class 4-A ext. 75 ft distance
Class 40-B - 80-B ext. 30 - 50 ft distance
Travel distance for a portable extinguisher
50ft
Class D extinguisher. will no more than _____ of traveling distance from the hazard.
75ft
Extinguisher. shall be inspected when initially placed in service and thereafter at approximately ______ intervals
30 day
Periodic inspection involves
Location in a designated place
No obstruction to access or visibility
Operating instructions on the nameplate are legible and face outward
Safety seals and tamper indicators are not broken or missing
Fullness determined by weighing or hefting
Exam for damage, corrosion, leakage, or clogged nozzle
Pressure gauge reading or indicator in the operable range or position
Tires and wheels in good condition
HMIS in place
Failed inspection of non-rechargeable dry chemical extinguisher. it should be:
removed, discharged, and destroyed
Failed inspection of non-rechargeable halon agent ext. it should be:
removed, not discharged, and returned to manufactured
Hydrostatic testing always includes
internal and external visual examination of the cylinder
Hydrostatic testing use ____ as medium _____ shall not be used.
water or other non-compressible liquid
air or other gases
If an extinguisher. cylinder or shell displays ______, it will not be Hydrostatic testing but condemned or destroyed.
repairs are done by soldering, welding, brazing, or patching
cylinder threads damaged
corrosion and pitting
exterior burned
10% of the cylinder has been removed
dent 1/4 in
any of the shells made of brass or copper is damaged
If ext fails Hydrostatic testing or visual test it will be:
condemned or destroyed
Aluminum Shell Cylinder that is exposed to temps of 350 degrees F shall be:
removed service and subject to Hydrostatic testing
Hydrostatic testing will occur every 5 years on the:
Stored-pressure water, loaded stream, and antifreeze
Wetting agent
AFFF
FFFP
Dry chemical (stainless steal shell)
Carbon Dioxide
Wet Chemical
Hydrostatic testing will occur every 12 years on:
Dry Chemical (not Stainless Steel)
Dry chemical, cartridge- or cylinder-operated
Halogenated agents steel shells
Dry powder, stored pressure, cartridge- or cylinder-operated with mild steel shells
What is exempt from periodic hydrostatic retesting?
Cartridges with DOT stamped 3E
Cartridges not exceeding 2 in. in diameter and having a length less than 2 ft
High pressure cylinders (3A, 3AA, 3AI)
shall be tested at 5/3 of the service pressure as stamped on the cylinder
Carbon Dioxide hose assemblies requiring Hydrostatic testing are tested at
1250 psi
Carbon Dioxide hose assemblies requiring Hydrostatic testing are tested at
300 psi
low-pressure hose assemblies used on wheeled extinguisher. requiring Hydrostatic testing are tested at
300 psi
high-pressure hose assemblies are used on the wheeled extinguishers. requiring Hydrostatic testing are tested at
3000 psi
stored pressure ext. requiring Hydrostatic testing are tested at specific pressure not to exceed
3 times normal operating pressure
Cartridge-operated dry chemical and powder ext. requiring Hydrostatic testing are tested at
normal factory test pressure
Test gauges need to be accurate to
+/- .5% or better
Test gauges will be capable of being read to within
1% of the test pressure
Pressure gauges used on test equipment must be calibrated _______ and master gauges ______.
semiannually
annually
Hydrostatic test pump hand or power-operated should be capable of producing:
150 or more pressure
Pressure in Hydrostatic testing of a cylinder should be maintained for
30-seconds minimum
The hose should be ______ before Hydrostatic testing of the low-pressure cylinder.
removed
The hose should be _____ before the Hydrostatic testing high-pressure cylinder.
filled with water
High-Pressure cylinders & cartridges that pass hydrostatic testing shall be stamped with
Retester's id number and month/year of retest
Stamping should be placed only on _____ provided on the cylinder
shoulder
top head
neck
or foot ring
Hose assemblies passing hydrostatic testing do not require
