Fire Prevention and Control Flashcards
(26 cards)
What is the Fire Triangle? (3 elements needed to start a fire)
Fuel
Air
Ignition (heat)
_____ include materials that, due to their chemistry, can be altered through a chemical reaction do produce carbon dioxide abs water.
Fuel
______ _______ are materials that have the captivity to resist changes when exposed to air, heat, shock or pressure under normal conditions.
Stable fuels
_____ _____ chemically react or become self-reactive when exposed to air, water, heat, shock or pressure. Gasoline propane, natural gas, solvents, solvent based paints and adhesives are an example of this.
Unstable fuels
______ is the energy necessary to increase the temperature of the fuel to a point where a sufficient vapours are given off to allow ignition to occur.
Heat
What are the 3 possible forms of ignition?
Piloted (spark)
Auto-ignition (heat it up, oven)
Spontaneous (chemicals form own heat)
What are some chemicals which can spontaneously ignite?
Acids, alkalis, oxidizing agents
As the varnish on a rag _____, the temperature of the rag ______. This is due to the large _____ _____ of the rag, which speeds oxidization but slows heat dissipation.
Oxidizes (evaporates)
Increases
Surface area
What are the 4 classifications of fire?
Class A - Ordinary Combustibles
Class B - Flammable liquids
Class C - Electrical
Class D - Combustible materials
What is Class A fires? And symbol
Ordinary combustibles. These fires require the cooling effects of water or water solutions.
GREEN TRIANGLE
What is a class B fire? And symbol
Flammable liquids. These fires are best extinguished by smothering them with DRY CHEMICAL or FOAM AGENTS or displacing the oxygen in the vicinity with carbon dioxide agents.
RED SQUARE
What is Class C Fire? And symbol
Fires that occur in energized or live electrical equipment. The extinguishing agent recommended dry chemical or carbon dioxide agent.
BLUE CIRCLE
What is a class D fire? And symbol
Combustible metals. Magnesium, titanium, zirconium, sodium and potassium are examples of metals that act as fuels for class d fires.
YELLOW STAR
In Canada, manufacturers submit their extinguishers to the ___ ______ of _____ for evaluation.
Underwriters laboratories of Canada
A 4A fire extinguisher can extinguish roughly _____ times as much fire as a 1A.
4
_____ _____ extinguishers are generally red, have a large tapered nozzle and are very heavy.
Carbon dioxide
_____ _____ extinguishers are usually red and have either a long narrow hose or no hose at all.
Dry Chemical
_____ extinguishers are generally silver in colour, have a flat bottom and a long narrow hose and are quite large.
Water
It is the responsibility of the ________ of the extinguisher to maintain it once it is in service.
Owner/operator
Never fight a fire when:
The fire could block your escape
You do not have the proper equipment to fight the fire or
The fire has spread beyond where it started
To be most effective, aim the fire extinguisher at the base of the fire.
T or F
T
What does PASS stand for?
Pull the pin
Aim the nozzle
Squeeze the handle
Sweep the nozzle
How does one dispose of oily rags?
Special metal cans
How should solvent soaked rags be stored?
Closed containers
