Engine Company Manual Flashcards
When Establishing Own water supply at single family, what must be considered and who is responsible
Officer must consider: Distance, Elevation and Friction Loss
Stretching Short consequences
Delayed Extinguishment
Fire Growth/Extension
Delayed Search
Reduced Survivability
Estimate the Stretch
Setback + Width of building + Length of building + 1/2 length per floor + 1 length at point of attack
Basic Duties of Engine Company
Establish water supply and stretch, advance and operate hose lines in a manner that renders success on the fire ground
Engine Driver Responsibilities with apparatus
Familiarize with: Equipment - Apparatus - Hose Lengths and Nozzles
Driver Positioning
Create the most direct access for advancing attack hose lines while allowing the truck company to position directly in front
All Engine Drivers on the Fire Scene Must work together to….
Work together to effectively establish both the primary and secondary water supplies
Stratification
Layering of fire gases. “Thermal Layering”
Fire Growth Stages
Incipient: Chemical reaction of Heat, Oxygen, Fuel
Growth: Fire Increases Size (Rollover Occurs)
FLASHOVER
Fully Developed: Fire Envelopes entire compartment
Decay: Fire lacks oxygen and combustion no longer sustained
BACKDRAFT
RECEO-VS
Rescue
Exposures
Confinement
Extinguishment
Overhaul
Ventilation
Salvage
VSP
Victim Survivability Profile
Residential Fire Flow (Flow Rate)
Require 100 to 200 gpm
Droplet Expansion Ratio
1700 to 1 at 212 degrees
Formula Smooth Bore Flow
29.7 x D² x √NP
(Developed by John Freeman)
Recommended that smooth-bore nozzles not exceed half the diameter of hose to which they are affixed
Pressure Variance on Master Stream Automatic Combination Nozzles
which nfpa states it
NFPA 1964 allows +/- 15 psi variation
Hydraulic Ventilation
2 ft from opening covering 80% in fog pattern
Blitz Attack
Use of an exterior master stream to knock main body of fire
Prior to establishing water supply ___________ must be notified to Engine OIC
Half Tank
Prior to establishing water supply _________ can be charged
only one attack line
Prior to establishing water supply additional lines can be charged for
What must be notified to crew using these lines
Exposure Protection
Line to the Attic
RIT
Controlling exterior fires
Engine driver advises the requesting officer that water supply has not been ESTABLISHED
Evacuation Order
Given verbally, signaled over radio via tones or blasted over on-scene apparatus airhorns
Signs of Backdraft
Dense Smoke no visible flame
Black Smoke Pushing around closed doors
Stained Glass
Air Movement Reversal
HRR
Heat Release Rate
Forward Lay
Places Supply line at closest hydrant preceding the incident
Split Lay
Supply Line dropped off at intersection
2nd engine can complete or 3rd engine create a relay
Reverse Lay
2nd Arriving engine lays out from scene to hydrant
Mindful of narrow streets and poorly positioned apparatus
Nozzle Reaction explanation
Force produced at nozzle and transmitted backward while flowing the stream
2 factors: Nozzle Pressure & Flow
Stream Velocity Formula
12.14 x √NP = ft/s
directly related to nozzle pressure
Drivers ultimate responsibility
Safe Delivery of personnel to and from scene
Engine Positioning
Position to create the most direct access for advancing attack hoselines allowing truck company to position directly in front
Misc Engine Driver Duties on fireground
Placing portable ladders and advancing exterior hose lines
Offensive vs Defensive
Offensive mode involves taking direct action to mitigate the problem (Direct Fire Attack)
Defensive: Used to prevent damage to the area around a structure
2 1/2 hoseline is typically appropriate for fires in..
Commercial Buildings
Exterior Attacks
Exposure Protection
Residential Roadway width is in average how many feet
12 ft
Dimensions of a single vehicle driveway
12 ft wide by 25 ft long
Grimwood Maximum Nozzle reaction firefighters can handle
1 FF = 60 lbf
2 ff = 75 lbf
3 ff = 95 lbf
How does Increased fire-stream velocity help combat large volume fires
Lessens negative impacts of wind and heat on streams
Streams hit harder and better distribute water
Describe Blitz Attack
Transition should be ________ and _________
Use of exterior master streams to knock down main body of fire
Once darkened down the engine company transitions to handline
transition should be rapid and coordinated
Drivers must choose the appropriate ________ that allows for a ______ _______ while leaving access for the remainder of the assignment
Must Choose the Appropriate Intake that allows for a quick connection while leaving access for the remainder of the assignment
