Fire Hazards Flashcards
What is a fire hazard
*Conditions that favor fire development or growth
*Oxygen, fuel, and heat
*Usually involve the mishandling of fuel or heat
*Fire or combustion is a chemical reaction between oxygen and a combustible fuel
*Source of ignition= Spark, flame and high temperature are needed
Fire Triangle
*Illustrates the three elements a fire needed to ignite: heat, fuel, and an oxygen
*The fire extinguishes by removing any one of the elements
Types of Fire
*A are fires involving combustible materials like paper, wood
*B are fires involving flammable liquids.
*C are fires involving live electrical equipment
*D are fires involving combustible metal (eg aluminum swarf)
*K are fires involving commercial cooking equipment like Cooking oil, animal fat, vegetable oil
Source of Fire Hazards
Source: (Solid, Liquid, Gases)
*Failure of electrical systems and equipment
*Lightning strikes
*Presence of a flammable gas or liquid mixture
*Hot surfaces; e.g; furnaces, chimneys
*Hot engines
*Heated surface
Parts of Fire Extinguisher
*Pin and Seal
*Gauge
*Hose
*Nozzle
*Inspection Tag
How to use a Fire Extinguisher
PASS
*Pull the pin in the handle
*Aim the nozzle of the base of the fire
*Squeeze the lever slowly
*Sweep from side to side
Types of Fire Extinguisher
*Water
*Foam
*Powder
*Carbon Dioxide
*Wet Chemical
Type of fire extinguisher containing water used against fires involving or ordinary combustibles like paper, wood, cloth and most plastics
CLASS A
Type of fire extinguisher using dry chemicals to put out fires caused by gasoline, oil and solvents.
CLASS B
Type of fire extinguisher containing carbon dioxide for use against electrical fires
CLASS C
Type of fire extinguisher for spraying dry powder on combustible metals like magnesium, titanium, aluminum, sodium, and potassium.
CLASS D
Type of fire extinguisher using a wet, potassium acetate-based, low pH agent to put out “cooking” fires in which there are animal or vegetable oils and fats.
CLASS K
What are the Fire Detection Devices
Smoke detectors
*require a flow of air in order to work well
Heat detectors
*detect fires where there is no smoke activated by the significant increase of temperature associated with fire
Flame detectors
*react to the movement of flames
Don’ts
*The smoke is extremely thick
*The fire is too hot for you to get close enough to fight it effectively
*The fire is greater than 3 feet across
*There are potentially hazardous substances near the fire
*You do not have the correct type of fire extinguisher for the fire at hand
*You do not know how to use a fire extinguisher
Do’s
*Call the fire department
*Begin evacuating others
*Turn off the gas valve to prevent escalation
*Meet at the preassigned meeting place
*Make sure that all persons have safely escaped
*When the fire department arrives, inform a firefighter if anyone is missing; do not reenter the building yourself
*Regularly check electrical equipment
*Maintain proper fire safety equipment
*Follow correct steps to put out fires and evacuate the building
