CHAPTER 7 - Portable Fire Extinguishers Flashcards
Class A fire extinguishers include a number. This number is related to the
A. type or fuel the fire extinguisher can extinguish.
B. sm or the discharge held.
C. approximate area or burn mg fuel the fire extingmsher can extinguish.
D. amount or water the fire extinguisher holds.
D. amount or water the fire extinguisher holds.
The safest and surest way to extinguish a Class C n re 15 10 turn off the power and
A. treat it like a Class A or B fire.
B. treat it like a Class D fire.
C. treat IL hke a Class K fire.
D. treat IL hke a Class A, B, or D fire.
A. treat it like a Class A or B fire.
All fires require
A. fuel, heat, and oxygen.
B. fuel and oxygen.
C. an ignition source.
D. fuel, heat, oxygen, and carelessness.
A. fuel, heat, and oxygen.
What ts the only dry chemical extinguishing agent rated as suitable for Class A fires?
A. Potassium chloride
B. Potassium bicarbonate
C. Ammonium phosphate
D. Ammonium bicarbonate
C. Ammonium phosphate
Disposable dry chemical exunguishers are
A. refillable.
B. not refillable.
C. effective on Class K fires.
D. not usable in freezing temperatures.
B. not refillable.
Electrical rooms should have extinguishers that are approved for use on
A. Class K fires.
B. Class A fires.
C. Class B fires.
D. Class C fires.
D. Class C fires.
Carbon dioxide extinguishers have relatively short discharge ranges or:
A. 1 to 3 feet.
B. 3 to 8 feet.
C. 10 to 15 feet.
D. 15 to 30 feet.
B. 3 to 8 feet.
Which lever is used to discharge the agent from a portable fire extinguisher?
A. Trigger
B. Nozzle
C. Cylinder
D. Handle
A. Trigger
The sodium chloridc-bascd extinguishing agent that is used in portable fire extinguishers
A. stored in liquid form
B· harmful to the environment.
C. used in all portable fire extinguishers
D. applied by hand
D. applied by hand
Self-cxpelling agents do not require
A. regular maintenance.
B. tamper seals on the cylinders.
C. a separate gas cartridge.
D. maintenance personnel to be specially trained in their use.
C. a separate gas cartridge.
An extinguishing agent used in dry-chemical fire extinguishers can be used on Class A, B, and C fires.
Ammonium phosphate
A solution based on fluorinated surfactants plus foam stabilizers to produce a fluid aqueous film for suppressing liquid fuel vapors.
Aqueous film-forming foam (AFFF)
A colorless, odorless, electrically nonconductive inert gas that is a suitable medium for extinguishing Class B and Class C fires.
Carbon dioxide
A fire extinguisher that uses carbon dioxide gas as the extinguishing agent. It is rated for use on Class B and C fires.
Carbon dioxide (CO2) fire extinguisher
A fire extinguisher in which the expellant gas is in a separate container from the agent storage container.
Cartridge/cylinder-operated fire extinguisher
A fire in ordinary combustible materials, such as wood, cloth, paper, rubber, and many plastics.
Class A fire
A fire in flammable liquids, combustible liquids, petroleum greases, tars, oils, oil-based paints, solvents, lacquers, alcohols, and flammable gases.
Class B fire
A fire that involves energized electrical equipment.
Class C fire
A fire in combustible metals, such as magnesium, titanium, zirconium, sodium, lithium, and potassium.
Class D fire
A fire in a cooking appliance that involves combustible cooking media (vegetable or animal oils and fats).
Class K fire
Electrically non conducting, volatile, or gaseous fire extinguishant that does not leave a residue upon evaporation.
Clean agent
The body of the fire extinguisher where the extinguishing agent is stored.
Cylinder
A powder composed of very small particles, usually sodium bicarbonate, potassium bicarbonate, or ammonium phosphate based with added particulate material supplemented by special treatment to provide resistance to packing, resistance to moisture absorption (caking), and the proper flow capabilities.
Dry chemical
A fire extinguisher that uses a powder composed of very small particles, usually sodium bicarbonate, potassium bicarbonate, or ammonium phosphate based with added particulate material supplemented by special treatment to provide resistance to packing, resistance to moisture absorption (caking), and the proper flow capabilities. These fire extinguishers are rated for use on Class B and C fires, although some are also rated for Class A fires.
Dry-chemical fire extinguisher
Solid materials in powder or granular form designed to extinguish Class D combustible metal fires by crusting, smothering, or heat-transferring means.
Dry powder
A fire extinguisher that uses solid materials in powder or granular form to extinguish Class D combustible metal fires by crusting, smothering, or heat-transferring means.
Dry-powder fire extinguisher
A material used to stop the combustion process. Extinguishing agents may include liquids, gases, dry-chemical compounds, and dry-powder compounds.
Extinguishing agent
Occupancies where the total amounts of Class A combustibles and Class B flammables are greater than expected in occupancies classes as ordinary (moderate) hazards. The combustibility and heat release rate of the materials are high.
Extra (high) hazard locations
A protein-foam concentrate that uses fluorinated surfactants to produce a fluid aqueous film for suppressing hydrocarbon fuel vapors.
Film-forming fluoroprotein (FFFP) foam
The total energy content of combustible materials in a building, space, or area including furnishing contents and combustible building elements expressed in MJ.
Fire load
Halocarbon agents include hydrochlorofluorocarbon (HCFC), hydrofluorocarbon (HFC), perfluorocarbon (PFC), fluoroiodocarbon (FIC) types of agents, and other halocarbons that are found acceptable under the Environmental Protection Agency Significant New Alternatives Policy program.
A fire extinguisher that uses a halogenated extinguishing agent; also called a clean agent fire extinguisher.
A liquefied gas extinguishing agent that extinguishes fire by chemically interrupting the combustion reaction between fuel and oxygen. Halogenated agents leave no residue.
______ include bromochlorodifluorormethane (_____ 1211), bromotrifluoromethane (_____ 1301), and mixtures of _____ 1211 and _____ 1301 (_____ 1211/1301).
A halogenated agent whose chemical name is bromochlorodifluoromethane (CBrCIF2) and that is a multipurpose, Class ABC-rated agent effective against flammable liquid fires.
Halon 1211
The grip used for holding and carrying a portable fire extinguisher.
Handle
The tapered discharge nozzle of a carbon dioxide fire extinguisher.
Horn
Pressure testing of a fire extinguisher to verify its strength against unwanted rupture.
Hydrostatic testing
Occupancies where the quantity, combustibility, and heat release of the materials is low, and the majority of materials are arranged so that a fire is not likely to spread.
Light (low) hazard locations
A water-based fire extinguisher that uses an alkali metal salt as a freezing-point depressant.
Loaded-stream fire extinguisher
A device that locks a fire extinguisher’s trigger to prevent its accidental discharge.
Locking mechanism
A fire extinguisher that uses an ammonium phosphate-based extinguishing agent that is effective on fires involving ordinary combustibles, such as wood or paper, and fires involving flammable liquids. It is rated to fight Class A, B, and C fires.
Multipurpose dry-chemical fire extinguisher
A device for use in applications requiring special water discharge patterns, directional spray, or other unusual discharge characteristics.
Nozzle
Occupancies that contain more Class A and Class B materials than are found in light hazard locations. The combustibility and heat release of the materials is moderate.
Ordinary (moderate) hazard locations
Acronym for the steps involved in operating a portable fire extinguisher: Pull pin, Aim nozzle, Squeeze trigger, Sweep across burning fuel.
PASS
A water-soluble flammable liquid such as alcohol, acetone, ester, and ketone.
Polar solvent
A gauge on a pressurized portable fire extinguisher that indicates the internal pressure of the expellant.
Pressure indicator
A nonpressurized, manually operated water-type fire extinguisher that is rated for use on Class A fires. Discharge pressure is provided by a hand-operated, double-acting piston pump.
Pump tank fire extinguisher
The process of converting the fatty acids in cooking oils or fats to soap or foam; the action caused by a Class K fire extinguisher.
Saponification
An agent that has sufficient vapor pressure at normal operating temperatures to expel itself from a fire extinguisher.
Self-expelling agent
A fire extinguisher in which both the extinguishing agent and expellant gas are kept in a single container and that includes a pressure indicator or gauge.
Stored-pressure fire extinguisher
A fire extinguisher in which water or a water-based extinguishing agent is stored under pressure.
Stored-pressure water-type fire extinguisher
A retaining device that breaks when the locking mechanism is released.
Tamper seal
The button or lever used to discharge the agent from a portable fire extinguisher.
Trigger
The U.S. organization that tests and certifies that fire extinguishers (among many other products) meet established standards. The Canadian equivalent is Underwriters Laboratories of Canada.
Underwriters Laboratories, INC. (UL)
A fire extinguisher containing distilled or de-ionized water and employing a nozzle that discharges the agent in a fine spray.
Water mist fire extinguisher
Normally an aqueous solution of organic or inorganic salts or a combination thereof that forms an extinguishing agent.
Wet-chemical extinguishing agent
A fire extinguisher containing a wet-chemical extinguishing agent for use on Class K fires.
Wet-chemical fire extinguisher
A fire extinguisher that expels water combined with a concentrate to reduce the surface tension and increase its ability to penetrate and spread.
Wetting-agent fire extinguisher
A portable fire extinguisher equipped with a carriage and wheels intended to be transported to the fire by one person.
Wheeled fire extinguisher
- Carbon dioxide exunguishers are not recommended for
A. Class B fires.
B. Class C fires.
C. outdoor use.
D. use in kitchens or laboratories.
C. outdoor use.
- Vegetable oil fires are classified as
A. Class A fires.
B. Class B fires.
C. Class C fi res.
D. Class K fires.
D. Class K fires.
- Fires that have not spread past their point of origin are
A. called introductory fires.
B. called incipient fires.
C. easily suppressed.
D. most often suppressed with an exte rior attack.
B. called incipient fires.
Where is the extinguish mg agent in a fire extinguisher stored?
A. Trigger
B. Nozzle
C. Cylinder
D. Handle
C. Cylinder
Class B fire extinguishers can be identined by the
A. solid red square.
B. solid blue square.
C. solid red circle.
D. solid yellow five-point star.
A. solid red square.
An extinguisher rated 40-B should be able to control a liquid pan fire
A. with a surface area of 40 square feet.
B. within 40 seconds.
C. 40 times more effectively than a normal Class B extinguisher.
D. 4 times more effectively than a normal Class B extinguisher.
A. with a surface area of 40 square feet.
Fire extinguishers weighing more than 40 pounds (18.14 kilograms) should be mounted so that the top of the
extinguisher is not more than:
A. 5 feet above the floor.
B. 3 feet above the floor.
C. 2 feet above the floor.
D. 6 feet above the floor.
B. 3 feet above the floor.
The three risk classifications according to the amount and type of combustibles that are present in an area are
A. light, ordinary, and extra hazards.
B. light, medium, and extra hazards.
C. normal, light, and extra hazards.
D. normal, average, and extra hazards.
A. light, ordinary, and extra hazards.
Carbon dioxidc is a gas that is 1.5 times heavier than
A. water
B. most extenguishing agents
C. air
D. carbon monoxide
C. air
Two factors to consider when dctermming the number and types of fire extinguishers that should be placed in each
area of occupancy arc the
A. qualties and quantities of the fuels.
B. fuels and ignition sources
C. types of fuels and area traffic.
D. types and quantities of the fuels.
D. types and quantities of the fuels.
Class D fires are most often encountered in
A. kitchens or restaurants.
B. offices or schools.
C. machine or repair shops.
D. hayfields or woodland areas.
C. machine or repair shops.
The best method of transporting a hand-held portable fire extinguisher depends on the
A. training level of the operator.
B. size, weight, and design of the extinguisher.
C. type of extinguishing agent.
D. size and type of fire.
B. size, weight, and design of the extinguisher.
The _______ is the discharge orifice of a portable fire extinguisher.
nozzle
A(n) _______ is a volatile or gaseous fire extinguishing agent that does not leave a residue when it evaporates.
clean agent
A Class _______ fire is one that involves wood, cloth, paper, grass, hay, or straw.
A
_______ is a colorless, odorless, electronically nonconductive, inert gas that puts out Class B and C fires by displacing oxygen and cooling the fuel.
Carbon dioxide
The _______ temperature is the minimum temperature at which a substance will burn.
kindling
Class _______ labels are represented by a solid red square.
B
A fire extinguisher must be ______ after each and every use.
recharged
_______ extinguishers have a short discharge range.
Carbon dioxide
_______ extinguishers are used primarily outdoors for fighting brush and grass fires.
Backpack
An individual with _______ training should be able to use most fire extinguishers safely and effectively.
basic
True/False
Fire extinguishers can contain several hundred pounds of extinguishing agent.
True
True/False
The primary disadvantage of fire extinguishers is their effectiveness.
False
True/False
A Class B extinguisher with a 10-B rating indicates that it is capable of extinguishing the highest level of Class B fires.
False
True/False
The bottom of an extinguisher should be mounted at least 4 inches (10.2 centimeters) above the floor.
True
True/False
Halon 1211 should be used only when its clean propenies are essential.
True
True/False
Class K extinguishers are identified by a sohd yellow five-point star.
False
True/False
“Press the trigger” is the first step of PASS.
False
True/False
Most offices or classrooms would be examples of light hazard areas.
True
True/False
All fire fighters are trained to perform fire extinguisher maintenance.
False
True/False
Time intervals for testing requirements for an exunguisher are based on construclion matenal and vessel type.
True
