Fire Extinguishers
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List the 5 classifications of fire
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A- ordinary combustibles; B- flammable liquids C- energized electrical; D- flammable metals; K- Animal & vegetable oils
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Fire Extinguisher
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A a manually operated device for extinguishing small fires
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What are Fire Extinguishers used as?
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First line of defence against fires of limited size.
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What are the 4 ways in which a fire can be extinguished?
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removing access to oxygen, removing fuel, inhibiting the chemical chain reaction and removing heat.
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Describe class A fire extinguishers and it's symbol
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These fires have a fuel source consisting of common materials like paper, cardboard, lumber and plastics. Green Triangle
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Describe Class B fire extinguishers and it's symbol
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These fires are flammable or combustible liquids such as gasoline, kerosene or common organic solvents. Red Square
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Describe Class C Fire extinguishers and it symbol
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These fires have common fuel sources but are ignited by electrical equipment such as appliances, switches, panel boxes power tools, or hot plates. Blue Circle
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Describe Class D Fire extinguishers and it's symbol
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These fires involve combustible metals such as magnesium, titanium, potassium, sodium and pyrophoric organometallic reagents. Yellow Star
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Describe Class K Fire extinguishers
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These fires are kitchen fires and have fuels similar to those in class B (vegetable oil and animal oils).
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CO2 extinguishers are effective on which classes of fires?
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Class B and C. The Carbon Dioxide effectively suffocates the fire and leaves no residue
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What is the range of class A ratings?
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1-A throught 40-A
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________,________, and _________ fires must be extinguished for an extinguisher to receive a ___A through a __A rating
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Wood panel fire, excelsior fire and wood crib fire, 1 6
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Are extinguishers being tested for a larger than 6 A rating subjected to all of these tests?
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Portable fire extinguishers that are tested for larger than a 6-A rating are only subjected to the wood crib test.
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What is the range of classifications for class B extinguishers?
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1-B through 640-B
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How is the working rating of class B extinguishers determined? What does the rating indicate?
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The numerical rating of the extinguisher is based on the exinguishing capability of an untrained operator. It indicates the relative fire extinguishing potential of the various sizes and types of extinguishers an d the area of a deep layer flammable liquid fire that an untrained operator can extinguish.
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What ist he only test assigning a class C designation?
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The extinguishing agent is tested for electrical non-conductivity.
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What is the primary use of class K extinguishers?
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commercial kitchen use
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What kind of systems can class K extinguishers be found in?
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portable, fixed systems or both
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Class K extinguishers may be of the ________ or ________ type
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dry, wet
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Dry chem class K extinguishers are of the ____ ____ or _____ ____ type
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sodium bicarbonate potassium bicarbonate
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Wet chem class K extinguishers are of the ______ ______, _____ ______ or _____ _____ type
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potassium acetate, potassium carbonate, potassium citrate
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Which extinguishing agent absorbs more heat per volume than any other known extinguishing agent?
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water
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What are the 4 basic dry chem powders and what do they consist of?
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Regular dry Chemical Powder (sodium bicarbonate), Multi-pupose dry chemical powder (ammonium phosphate), Purple K (potassium bicarbonate) and Monnex (potassium carbonate)
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What are the 3 elements commonly found in halogen based extinguishing agents?
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Fluorine, Chlorine and Bromine
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Define PASS
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Pull Aim Squeeze and Sweep
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What 5 conditions must be met in order to use an extinguisher?
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The building has been or is in the process of being evacuated, 9-1-1 has been called,, the fire is small (incipient stage) and is not spreading beyond initial area, exit is clear, correct extinguishr for task in on hand and there is no doubt as to the proper use and operation of extinguisher
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When should extinguishers be inspected?
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thoroughly inspected yearly and should be inspected by the owner monthly
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Name 8 things to look for when inspecting extinguishers
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accessible and properly located, exterior body for corrosion or other damage, operating instructions on name plate are leible, discharge nozzle for cracks, dirt or obstructions,ensure the lock pins and tamper seals have not been removed, full of agent by checking the pressure gauge, inspection tag or date, maintenance and date of recharge, condition of the hose.
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Who is responsible for the servicing of portable fire extinguishers?
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property owner or building occupant
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What does AFF stand for?
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Aqueous Film Forming Foam
