Ch. 7 - Portable Fire Extinguishers Flashcards
Class A Fire
ordinary solid combustible material
Class B Fire
flammable or combustible liquids
Class C Fire
energized electrical equipment
Class D Fire
combustible metals
Class K Fire
cooking oils and fats
Class A Symbol
Green triangle
Class B Symbol
Red square
Class C Symbol
Blue circle
Class D Symbol
Yellow star
Class K Symbol
Black hexagon
Water mist extinguisher
conduct less electricity; can be used on Type A and C
Loaded-stream extinguisher
use a solution of water containing alkali metal salt to prevent freezing
dry chemical fire extinguisher
Used on Type B and Type C
ammonium phospate
only dry chemical rated for Type A fires
carbon dioxide fire extinguisher
Type B and C
Class B Foam Fire Extinguishers
Type A and B
wet-chemical fire extinguishers
only type to use on Class K fires
dry powder extinguishers
used for Class D fires; form a solid crust over the metal
PASS
Pull the pin; Aim at the base; Squeeze the trigger; Sweep the nozzle
What are the types of hazard category?
Light, Ordinary, Extra
Besides putting out fires, what is another use for fire extinguishers?
Controlling fires where trad methods of suppression are not recommended
Fire extinguishers are rated for their ability to control a specific type of fire and…?
ability to prevent rekindling
What is one chemical used as a dry chemical extinguishing agent?
ammonium phosphate
Why don’t use ammonium phosphate on a class k fire?
it will counteract the foaming properties of any alkaline agent applied to the fire
