NFPA 10 Chapter 4-8 Flashcards
(23 cards)
What kind of extinguishers cannot contain an agent that is a conductor of electricity?
Extinguisher with Class C rating
*Pressurized water fire extinguishers manufactured prior
to 1971
*Solid acid
*Chemical foam (excluding film-forming foam)
*Vaporizing liquid (e.g. carbon tetrachloride)
Are all examples of?
Obsolete Fire Extinguishers
what are the General Requirements for the selection of fire extinguishers?
Type
Size
Hazard
Class A Fires are?
Ordinary Combustible - wood, cloth, paper, rubber and plastics
Flammable liquids, combustible liquids, petroleum greases, tars, oils, solvents, alcohols and flammable gasses are all examples of?
Class B Fires
Class C Fires are?
Fires that involve energized electrical equipment
Combustible metals, such as magnesium, titanium, sodium, lithium, and potassium are all examples of?
Class D Fires
Cooking appliances that involve combustible cooking media (vegetable or animal oils and fats)
Class K Fires
True or False?
Class C, Class D or Class K hazards shall not be required to have a number preceding the classification letter.
True
Wheeled fire extinguishers shall be considered when
- High hazard areas are present
- Limited available personnel are present
a. high agent flow
b. increased agent stream range
c. increased agent capacity
Hazards where quantity and combustibility of Class A combustibles and Class B flammables are low and expected
Light Hazard (Low)
Ordinary Hazard (Moderate)
Hazards where quantity and combustibility of Class A combustibles & Class B flammables are moderate rate of heat release are expected
Hazards where quantity and combustibility of Class A combustible material are high or where high amounts of Class B flammables are present.
Extra Hazard (High)
Hazards where Class B flammables expected to be present is more than 5 gal (18.9 L) in any room area or area
Extra Hazard (High)
Hazards where Class B flammables typically expected to be present is from 1 gal to 5 gal (3.8 L to 18.9 L) in any room or area
Ordinary Hazard (Moderate)
Required building protection shall be provided by fire extinguishers for?
Class A Fires
______________ protection shall be provided by fire extinguishers for such Class A, B, C, D, or K fire potentials as might be present.
Occupancy hazard
Extinguishers for Pressurized Flammable Liquids and Pressurized Gas Fires selection shall be made on the basis of recommendations by
Manufactures
Large-capacity dry chemical extinguishers of 10 lb (4.54 kg) or greater and a discharge rate of 1 lb/sec (0.45 kg/sec) or more shall be used to protect these hazards.
Pressurized Flammable Liquids and Pressurized Gas Fires
Aqueous film-forming foam (AFFF) and film-forming fluoro-protein foam (FFFP) shall not be used for the protection of water-soluble flammable liquids, such as alcohols, acetone, esters, ketones, and so forth unless specifically referenced on the
extinguisher nameplate
Only water-type extinguishers shall be installed in areas containing oxidizers, such as
pool chemicals
True or False
You can install multipurpose dry chemical fire extinguishers in areas containing oxidizers
False (Only water-type extinguishers)
True or False
Class D fire extinguishers and agents shall be compatible with the specific metal for which protection is provided.
True
