ch6 ventilation size up Flashcards
One of the most effective tactics available to firefighters is?
ventilation
blank involves the use of fans, blowers, nozzles and other mechanical devices to create or redirect the flow of air within an involved compartment to facilitate operations within that compartment
forced ventilation
a compartment fire starts with the ignition stage and progresses through four additional stages?
growth, flashover, fully developed, decay
the early portion of the growth stage is sometimes called the?
flame spread phase
sometimes called blank, a rollover occurse when unburned combustible gases released during the ignition and early growth stages of the fire accumulate at the ceiling level
flameover
blank is the most direct way of eliminating gases that cause rollover
extinguishing the main body of the fire
blank occurs when there is simultaneous ignition over the entire surface of a room and its contents
flashover
flashover can usually be avoided by?
directing a stream of water toward both the ceiling level and the contents of the room to cool them below their ignition temperature and by early and aggressive ventilation
following flashover, a compartment fire continues to burn intensely. During this stage, sometimes called blank, the fire continues to burn
free-burning phase
a blank is the rapid, almost instantaneous comubustion of flammable gases, carbon particles, and tar balloons produced by material that are burning under conditions of insufficient oxygen
backdraft
blank can also be an indicator of a fire’s stage of development
smoke density
coordinating the ventilation operation with rescue and fire attack generally involved three components?
timing, location, method
The blank of ventilation operations can be on of the most critical aspects of ther operation, both in its effectiveness and in its safety
timing
deciding where to blank the ventilation opening is often dictated by where the fire is located in the building and the extent of the fire’s development
location
