Essentials Of Fire Fighting Flashcards
NFPA ___, Standard for Portable Fire Exstinguishers, provides additional information on rating, placement, and use.
10
The stated minimum size requirement for a dry chemical extinguisher is on with a rating of ____; the required rating for a carbon dioxide (CO2) extinguisher is ___.
80 B:C, 10 B:C
NFPA 1901 also requires pumping apparatus to carry one 2 1/2 gallon or larger ___extinguisher with a mounting bracket for use on Class A fires
Water
Stored-pressure water extinguishers, also called air-pressurized water (APW) extinguishers, are useful for all types of small Class __ fires and are often used for extinguishing confined hot sports during over haul operations.
A
AFFF extinguishers are suitable for use on Class ___ and Class ___ fires. Also useful but combating fires or suppressing vapors on small liquid fuel spills
A, B
Two basic types of dry chemical extinguishers in use today:
Regular B:C-rated
Multipurpose & A:B:C-rated
Commonly used dry chemical extinguishers
Sodium bicarbonate Potassium bicarbonate Urea-potassium bicarbonate Potassium chloride Mono ammonium phosphate
Classes or fires A-\_\_\_\_\_ Green B-\_\_\_\_\_ Red C-\_\_\_\_\_ Blue D-\_\_\_\_\_ Yellow
Ordinary combustible
Flammable Liquids
Electrical
Metals
Letters indicate the _____ of fuel on which the extinguisher will be effective
Class
Class A & B extinguishers are also rated according to performance capability, represented by a ____
Number
Classification Tests are conducted by (UL)
Underwriters Laboratories . Inc
Class A EX. Are rated from 1-A through __-A. Based on agent amount, duration and range.
40
Class B EX are rated from 1-B - __-B. Based on the approximate sq/ft area of a flammable liquid.
640
Class C EX, no Rating.
Class A&B fires that are energized.
Class ___ agents cannot be given a multipurpose rating for use on other classes of fire.
D
The alphabetical/geometric symbols for the four classes of fire
Green triangle
Red Square
Blue Circle
Yellow star
Dry Chemical EX have a corrosive residue.
Don’t use on sensitive electronic.
EX. That is deficient in weight by ___ %, should be removed.
10
Inverting-type fire EX. No longer made after
1969
3 Methods of moving water in a system
Direct pumping
Gravity system
Combination
Grid system should consist of the following
Primary feeders-16”
Secondary feeders-12”
Distributors-8”, individual hydrants
Residential areas should be closely girded by 8” cross connecting mains at intervals not more than ___ ft.
600’
Control Valves in a water distribution system
Gate valve, butterfly
2 types of valves for water systems
Indicating
Non-indicating
