Chapter 5 (Selection of Portable Fire Extinguishers) Flashcards
what are the six criteria in determining the selection of a fire extinguisher?
(1) type of fire most likely to occur
(2) size of fire most likely to occur
(3) Hazards in the area where the fire is most likely to occur
(4) Energized electrical equipment in the vicinity of the fire
(5) ambient temperature conditions
(6) other factors as stated in section h.2.
Portable fire extinguishers shall be installed as a first line of defense to cope with?
Fires of a limited size
If a building is equipped with automatic sprinklers, standpipe and hose, or other fixed protection equipment, does that have an impact on the selection of the fire extinguishers?
No the selection of the extinguishers shall be independent of that.
what is a class A Fire?
Fires are in ordinary combustible materials, such as wood, cloth, paper, rubber, and many plastics.
what is a class B fire?
fires in flammable liquids, combustible liquids, petroleum greases, tars, oils, oil-based paints, solvents, lacquers, alcohols, and flammable gases.
what is a class C fire?
fires that involve energized electrical equipment.
what is a class D fire?
fires in combustible metals, such as magnesium, titanium, zirconium, sodium, lithium, and potassium.
What is a class K fire?
fires in cooking appliances that involve combustible cooking media. (vegetable or animal oils and fats)
The classification of fire extinguishers shall consist of _________ that indicates the class of fire on which the fire extinguisher has been _________
(1) A letter
(2) found to be effective
Fire Extinguishers that are classified for A and B fires additionally need to have _______ proceeding the classification letter which indicates the ________.
(1) A rating number
(2) relative extinguishing effectiveness
Do class c,d, or k type extinguishers need a rating number?
No
Use of Halon agent fire extinguishers shall be limited to what applications?
(1) Where a clean agent is necessary to extinguish fire efficiently without damaging the equipment or area being protected.
(2) where the use of alternative agents has the potential to cause a hazard to personnel in the area.
Placement of portable fire extinguishers containing halogenated agents shall conform to?
minimum confined space volume requirement warnings contained on the fire extinguisher nameplates.
When should a wheeled fire extinguisher be considered?
(1) High hazard areas are present.
(2) Limited available personnel are present, thereby requiring an extinguisher that has the following features:
(a) High Agent flow rate
(b) Increased agent stream range
(c) Increased agent capacity
What are the three classifications that can be given to a room?
(1) Light Hazard
(2) Ordinary Hazard
(3) Extra Hazard
What classifies a room as a light hazard?
(1) low rates of heat release are expected
(2) Normally expected quantities of class A combustible furnishings.
(3) the total quantity of class b flammables typically expected to be present is less the 1 gal in any room or area.
What classifies a room as ordinary hazard?
(1) Moderate rates of heat release are expected.
(2) class A combustible materials beyond normally anticipated furnishings.
(3) the total quantity of class b flammables typically expected to be present is from 1 Gal to 5 Gal in any room or area.
What classifies a room as extra hazard?
(1) high rates of heat release are expected
(2) occupancies consist of fire hazards involved with the storage, packaging, handling, or manufacture of class A combustibles.
(3) the total quantity of class B flammables expected to be present is more the 5 Gal in any room or area.
Required building protection shall be provided by what type of extinguishers?
Class A
Are fire extinguishers provided for building protection permitted to also be considered for the protection of occupancies?
Yes, they may be considered for the protection of occupancies having a class A fire potential.
Buildings having an occupancy hazard subject to class B and class C fires, or both shall have?
(1) A standard complement of class A fire extinguishers for building protection.
(2) Plus additional Class B or Class C fire extinguishers, or both.
Are fire extinguishers with more than one letter classification (such as 2-A: 20-B: C) permitted to satisfy the requirements of each letter class?
Yes, they shall be permitted to satisfy the requirements of each letter class.
What criteria does a class B fire extinguisher need for Pressurized flammable liquids and pressurized gas fires?
(1) Large-capacity dry chemical extinguishers of 10 LB or greater.
(2) discharge rate of 1 LB/sec or more
What criteria does a fire extinguisher need for three dimenional fires?
(1) Large-capacity dry chemical extinguishers of 10 LB or greater.
(2) discharge rate of 1 LB/sec or more
Obstacle fires. selection of a fire extinguisher for this type of hazard shall be based on one of the following
(1) extinguisher containing a vapor-suppressing foam agent.
(2) Multiple extinguishers containing non-vapor-suppressing class B agents intended for simultaneous application.
(3) Large Capacity extinguishers of 10 LB or greater and a minimum discharge rate of 1 LB/sec.
what type of extinguishers shall not be used on water-soluble flammable liquid fires?
AFFF and FFFP extinguishers
Class K fire extinguishers manufactured after January 1, 2002, shall not be equipped with what?
extended wand-type discharge devices
what type of extinguisher shall not be used on electronic equipment?
dry chemical fire extinguishers
What type of extinguishers are needed for areas where pool chemicals containing chlorine or bromine are stored?
Only water or foam extinguishers
