Lesson 3

• Fire hazard is a conditions that favor fire development or growth. This usually involved in mishandling of fuel or heat.
• Source of ignition of fire: Spark, flame and high temperature
• Fire Triangle

  Three elements: Heat, fuel and oxygen
• How to use a Fire Extinguisher?

  P - pull the pin in the handle

  A - aim the nozzle of the base of the fire

  S - squeeze the lever slowly

  S - sweep form side to side
• Types of Fire Extinguisher

  • Water
  • Foam
  • Powder
  • Carbon Dioxide
  • Wet Chemical
• Classes of Fire Extinguisher

  Class A - contains water for use against fire involving the combustible material like paper and wood

  Class B - use dry chemicals to put out fire caused by gasoline, oil and solvents

  Class C - contain carbon dioxide for use agains electrical fires

  Class D - spray dry powder on combustible metals like magnesium and lithesium

  Class K - use a wet, potassium acetate-based, low pH agent to put out cooking fires
• Fire Detection Devices

  • Smoke Detectors
  • Heat Detectors
  • Flame Detectors