Compartment Ventilation Heat

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Author:
JasonComley
ID:
176379
Filename:
Compartment Ventilation Heat
Updated:
2012-10-08 21:59:30
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Compartment Ventilation Heat
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Compartment Ventilation Heat
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  1. What are 3 types of heat related problems?
    • Heat cramps/fatigue.
    • Heat Exhaustion.
    • Heat Stroke.
  2. What are the signs/symptons of Heat Exhaustion?
    • Profuse sweating.
    • Cold, clammy skin.
    • Normal or slightly elevated temperature.
    • Pale & Dizzy.
    • Weak rapid pulse.
    • Shallow breathing.
    • Nausea & headache.
    • Loss of consciousness.
  3. What are the signs of heat stroke?
    • Generally no perspiration.
    • Dry skin.
    • Very hot.
    • High temperature.
    • Heat Stroke is a medical emergency.
  4. What are the four types of ignition source?
    • Open.
    • Intermittent.
    • Concealed.
    • AIT.
  5. What are the two pressure regions inside a compartment fire and what separates them?
    • Over-pressure region.
    • Under-pressure region.
    • Separated by the neutral plane.
  6. What is Pyrolosis?
    Decompostion of a substance by heat.
  7. What are two types of 'controlled fire?
    • Fuel controlled.
    • Ventilation controlled.
  8. Define Flashover?
    Flashover is a transition stage in the development of a compartment fire that results from the ignition of accumulated fire gases leading to total room involvement.
  9. Define Backdraught?
    • Once it has consumed the available oxygen, the fire begins to subside, even though the compartment and the contents are still very hot.
    • The introduction of oxygen supplies the missing ingredient and the smoke ignites, if an ignition source is available.
  10. What signs do firefighters need to be alert for when reading a fire? 
    • Height & movement of neutral plane.
    • Changes in the air track.
    • Changes in smoke colour.
    • Pulsations of smoke.
    • Turbulent movement of smoke gases.
    • Smoke being drawn back through an opening.
    • Flames in the overpressure region.
    • Blackening and crazing of windows without flame showing.
    • Whistling noises.
    • Colour of flame.
    • Heat build up.
  11. What are three methods of extinguishing a fire?
    • Direct extinguishing.
    • Indirect extinguishing.
    • Gas Cooling.
  12. What is ventilation?
    Ventilation is the planned and systematic removal of smoke, heated air and fire gases from a structure and their replacement with a supply of cooler and cleaner air in order to faciliitate other firefighting priorities.
  13. What are the advantages of ventilation?
    • Speeds initial attack by improving visibility allowing for quicker location of and access to the seat of the fire.
    • Removal of superheated gasses reduces flashover/backdraught risk.
    • Working conditions will be improved.
    • Speed of secondary searches increased.
    • Victim survival increases due to removal of toxic gases and introduction of clean air.
    • Property damage lessened by quicker extinguishment.
    • Overhaul conditions are improved with the removal of toxic gases.
  14. What will the IC consider before commencing ventilation?
    • Location of fire.
    • Best location for the exhaust opening to be created (use of TIC).
    • Appointment of FF to coordinate ventilation operations.
    • Informing fireground personnel that PPV is in operation and location of exhaust vents.
    • Once PPV has commenced, entry to structure will be by inlet opening only.

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