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44 Cards in this Set
- Front
- Back
below what percentage of 02 do physical symptoms start to occur in body?
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18 respiratory rate is increased
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most dangerous fire gas
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carbon monoxide
-accounts for more deaths than any other toxic product of combustion 1200ppm. |
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result of incomplete combustion?
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carbon monoxide
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how far smoke particles enter the lungs is affected by?
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the size of the particle
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what concentrations of carbon monoxide can be dangerous?
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500ppm or five hundredths of one percent
-when level is above 1 percent unconsciousness and death can occure without physiological signs |
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hydrogen chloride comes from?
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burning plastics, pvc, telephone and electrical cables
-pungent odor (plasticy smell) |
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hydrogen cyanide comes from?
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burning furniture, rugs, rubber, nylon, wool
-bitter almond odor -used in the gas chamber -affects tissue respiration affecting 02 exchange at cellular level 50ppm |
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phosgene gas?
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-burning refrigerants
-colorless with musty hay smell -forms hydrochloric acid in the lungs -300ppm idlh |
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4 components of open circuit breathing apparatus
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facepeice
-air cylinder -harness -regulator |
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scba pressures and duration
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2216-30 minutes
3000-30 or 45 minutes 4500- 30 or 60 minutes |
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remote gauge and cylinder gauge must be within?
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100 psi
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process for cleaning facepeice?
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-wash
-sanitize in disinfectant 5 minutes -rinse thoroughly -air dry (exception for training) |
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hydro test dates and cylinder life
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steel -every 5 yrs hydro, as long as passes hydro
composite- 3 yrs and discarded after 15 yrs carbon or solid aluminum- hydro every 5 yrs, used as long as passes hydro |
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skip breathing
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inhale normally, pause, inhale again and exhale
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typical scba unit weighs?
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25 to 35 lbs
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daily inspection of scba
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-bottle pressure
-valves in correct position -low pressure alarm -general condition of equipment -user gauge in relation to cylinder gauge -straps extended |
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sequence for filling air cylinder
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-look in book
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sequence for changing air cylinder
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-place scba on firm surface
-close cylinder valve -bleed air pressure from high and low pressure hoses -disconnect the high pressure hose from coupling -remvoe empty cylinder -verify replacement is 90 to 100% full -check cylinder valve and high pressure fitting for debris -place new cylinder in backpack -connect high pressure hose -slowly and fully open cylinder valve and listen for audible alarm as system pressurizes -check for leaks |
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secondary search
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conducted after fire is under control and greatest hazards have been controlled, slower and more thourough to enure no occupants were overlooked during primary
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if neighbor tells you no one is home do you beleive them
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no
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ff lost in structure
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dont always move to lower level
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during a search periodically do what?
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stop and listen
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air purifying respirator
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contain normal levels of 02 but there air airborne particulates such as dust
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low air alarm on scba sounds at
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25 percent
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when conducting search have what tools?
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radio, tic (if available), flashlight, and forcible entry tools
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how often shall PASS devices be tested?
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daily
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4 common respiratory hazards associated with fire
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oxygen defeciency
-elevated temperatures -smoke -toxic atmospheres |
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limitations of wearer of scba
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-physical-condition, agility, facial features
-medical factors-nuerological functioning, muscular/skeltal condition cardio, respiratory function -mental factors- adequate training, self confidence, emotional stability |
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limitations of scba equipment
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limited vis
-decreased ability to communicate -increased weight -decreased mobility |
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limitations of air supply
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-physical condition of user
-degree of physical exertion -emotional stability of user -condition of apparatus -cylinde pressure before use -training and experience of user |
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closed circuit scba
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exhaled air stays within system and is reused
(shipboard operations, and extended hazmats) |
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ways to prevent fogging of mask
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use a nosecup (deflects air away from lens
-apply antifogging chemical |
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supplied air respirators
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travel up 300 ft connected to air supply by hose
-also has 5 to 10 minute emergency egress cylinder |
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annual inspection and maintenance
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done by factory certified technicians, done in accordance with manufacturer recommendations, dissembel apparatus and conduct test using specialized tools
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why is crawling beneficial with limted visibilty
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may get belwo thermal layer and increase visibility, crawling increase safety by allowing ff to feel floor in front of them with tool as they move along
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rescue v extrication
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rescue-removal of victims involved in entrapment by fires, terrain features, confined spaces, or any others not an extrication
-extrication=incidents involve disentanglement and removal of victims from vehicles or machinery |
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primary search
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-rapid but thorough search performed before or during fire suppression operations
-performed asap when probability structure is occupied -often under adverse conditions |
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during primary search do we always use buddy system?
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yes teams of 2 or more
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during primary search it is important too?
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inform ic of negative and postive information
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most critical areas in multistory building to search
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-fire floor
-floor above fire floor -top floor -then search other floors |
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osha and nfpa 1500 require ric be standing by whenever ff are in hazard zone inside burning building?
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true
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ric composed of
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2 firefighters suitably equipped to enter and locate ff in distress
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rescuers searching for ff in distress should first try?
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to establish radio contact
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removing located ff
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one study found as many as 12 ff were needed to successfully move one downed ff and it took up to 20 minutes
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