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What is HRR?
Heat Release Rate (HRR)
The rate at which energy (heat) is released by the burning of a fuel and oxygen mixture.
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What is flow path?
The movement of heat and smoke from the higher air pressure within the fire area to all other lower air pressure areas both inside and outside of a fire building.
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In ventilation limited fires, Hydrocarbon based products burn at __________ the rate as ordinary combustibles and generate __________ times the smoke production as ordinary combustibles.
Hydrocarbon based products burn at TWICE the rate as ordinary combustibles and generate FOUR TO TEN times the smoke production as ordinary combustibles.
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What is ventilation profile?
The appearance of the fire building’s ventilation points showing the flow paths of heat and smoke out of the structure as well as any air movement into the structure.
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TRUE/FALSE
Members operating on the outside only need to communicate the ventilation profile upon arrival at a fire.
FALSE
Members operating outside must continually report on the fires ventilation profile to increase the situational awareness of all members until the fire is under control.
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Who coordinates and approves all ventilation?
All ventilation must be coordinated and approved by the Officer of the interior search team.
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What is ventilation for extinguishment?
Ventilation point (removing a window) is made to the fire area as the engine commences applying water into the fire area.
- opened window is an exhaust ventilation point and potential flow path for the higher air pressure from the fire area.
- vent points (windows) should be in close proximity to the seat of the fire.
- windows should be opposite the operating hoseline, which will allow a flow path for steam, heat and smoke to exit the structure ahead of the nozzle team.
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What is venting for life?
Horizontal ventilation point is made in an attempt to reach a known or suspected victim.
- ventilation conducted without applying water to the fire will create flow paths toward the ventilation opening.
- any ventilation point will allow the fire to grow if water is not being applied simultaneously.
- all ventilation must be coordinated and approved by the Officer of the interior search team.
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The company officer must consider the need for horizontal ventilation based on:
Are doors in the fire area controlled?
What is the development stage of the fire?
Is there a charged hoseline moving in on the fire?
Will the interior search of the area be delayed or prevented?
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Horizontal ventilation in the fire area should not occur until __________ or ___________.
Horizontal ventilation in the fire area shall not occur until a CHARGED HOSELINE IS IN POSITION AND OPERATING ON THE FIRE , or APPROVAL IS GIVEN BY THE LADDER COMPANY OFFICER IN THE AREA OR APTARTMENT.
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As part of their size-up, members of the outside team must report wind conditions and its affect on the fire and smoke conditions to _________________.
THEIR OFFICER AND THE INCIDENT COMMANDER
As part of their size-up, members of the outside team must report wind conditions and its affect on the fire and smoke conditions to THEIR OFFICER AND THE INCIDENT COMMANDER
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TRUE/FALSE
It is important for an engine company to realize that a properly positioned hoseline will contain the fire, possibly saving civilian lives and protecting firefighters who are searching both the fire floor and the floors above.
Only in extreme cases should an engine company become involved in search and rescue without simultaneously stretching and positioning a hoseline.
TRUE
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Who does the 1st due ladder company officer communicate the location of the fire to?
Engine company officer and the incident commander
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The 1st arriving ladder company’s priorities are:
Locate the fire area.
Control the door to the apartment or area, and any other ventilation points.
Communicate the fire location to the Engine Officer and the IC.
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TRUE/FALSE
A secondary search shall be completed during any extensive overhauling of the fire area.
FALSE
A secondary search shall be completed BEFORE any extensive overhauling of the fire area is attempted.