A safety precaution when performing vertical ventilation is to work: (515) [4.3.12]
with the wind at your back or side to protect yourself from heat, smoke, and embers.
only near the center of the roof.
only near the corners of the roof.
facing the wind so you can better see any changes in fire...
Chapter Test 11 (IFSTA 7th Edition)
A safety precaution when performing vertical ventilation is to work: (515) [4.3.12]
with the wind at your back or side to protect yourself from heat, smoke, and embers.
only near the center of the roof.
only near the corners of the roof.
facing the wind so you can better see any changes in fire behavior. - ✔✔with the wind at your back or
side to protect yourself from heat, smoke, and embers.
As a fire within a compartment consumes oxygen, the amount of unburned fuel in combustion products:
(494) [4.3.11]
may either increase or decrease.
increases.
stays the same.
decreases. - ✔✔increases.
Before interior attack, what action will reduce oxygen available to the fire? (495) [4.3.11]
Directing hose streams on the exterior of the structure
Closing exterior doors and windows
Directing hose streams to the interior of the structure
Opening exterior doors and windows - ✔✔Closing exterior doors and windows
Cutting an inspection hole helps determine: (518) [4.3.12]
possible exposures.
potential for survivors.
the location of the fire.
wind direction. - ✔✔the location of the fire.
Firefighters should continue to wear SCBA and monitor the environment until: (508) [4.3.11, 4.3.12]
no smoke or gases are visible.
,the atmosphere is confirmed to be safe.
overhaul activities are initiated.
the incident is stabilized. - ✔✔the atmosphere is confirmed to be safe.
Fires in windowless buildings usually require ______ ventilation for removal of smoke. (523) [4.3.12,
4.3.11]
natural
hydraulic
mechanical
combination - ✔✔mechanical
For what situation would an incident commander order a trench cut? (520) [4.3.12]
Victims are trapped on upper floors
Structural collapse is likely
The main fire is too large to extinguish
The main fire is igniting nearby exposures - ✔✔The main fire is too large to extinguish
Horizontal ventilation can be employed effectively in a basement if the basement: (523) [4.3.11]
consists of one small compartment.
has ground level windows or below ground level windows in wells.
consists of a large open plan.
has interior stairs. - ✔✔has ground level windows or below ground level windows in wells.
Mechanical ventilation is designed to: (508) [4.3.11, 4.3.12]
supplement effects of natural ventilation.
replace natural ventilation.
counter effects of natural ventilation.
reduce effects of natural ventilation. - ✔✔supplement effects of natural ventilation.
, Nearby structures and vegetation can be ignited if ______ carries hot fire brands or embers aloft. (502)
[4.3.11, 4.3.12]
conduction
radiation
diffusion
convection - ✔✔convection
Negative pressure ventilation involves artificially lowering pressure inside the structure so that: (507)
[4.3.11]
smoke and fuel gases move toward lower-pressure openings more quickly.
fresh air from outside moves in more quickly.
smoke and fuel gases will have limited movement.
fresh air from outside will not enter. - ✔✔fresh air from outside moves in more quickly.
Negative-pressure ventilation requires that the opening around the fan: (509) [4.3.11]
allow hose streams to fit through the opening.
be sealed to prevent outside air from being drawn in around the fan.
allow the fan to be easily moved if needed.
be at least six inches to allow outside air to be drawn in around the fan. - ✔✔be sealed to prevent
outside air from being drawn in around the fan.
Positive pressure ventilation involves artificially raising pressure inside the structure so that: (507)
[4.3.11, 4.3.12]
fresh air circulates in the interior.
smoke and fuel gases move toward lower-pressure openings more quickly.
fresh air from outside moves in more quickly.
smoke and fuel gases will have limited movement. - ✔✔smoke and fuel gases move toward lower-
pressure openings more quickly.
Positive-pressure attack is only effective if the location of the fire is known and: (510) [4.3.11]
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