Chapter 4 - Ventilation Techniques Flashcards
Hot air, smoke, and heated gases traveling through a building via BLANK heating present the greatest firefighting problem
a. Induction
b. Conduction
c. Radiant
d. Convection
d. Convection
Smoke and heated gases within a structure
will normally
a. Travel upward and then move horizontally if there is an upward obstruction and finally downward
b. Travel horizontally until meeting an obstruction then upward through the building, usually vis concealed spaces
c. Travels in all directions simultaneously
d. The movement of smoke and heated gases is nearly impossible to predict under fire conditions
a. Travel upward and then move horizontally if there is an upward obstruction and finally downward.
This is the general rule behind all ventilation operations: Open the fire building in such a way that all accumulations of heat and the products of combustion will leave the building by natural ___________.
a. Induction
b. Conduction
c. Convection
d. Radiation
c. Convection
Roof ventilation is rarely needed in one and two story dwellings unless
a. The fire has entered the walls
b. The fire is moving upwards via the walls or stairways
c. The fire is in the attic
d. Roof ventilation should always be performed when there is a working fire in a structure.
c. The fire is in the attic.
When venting double-hung windows
a. Completely remove the glass and window frame
b. Open the bottom or break out the bottom pane only
c. Open the top or break out the top pane only
d. Open two thirds from the top and one third from the bottom.
d. Open two thirds from the top and one third from the bottom.
When wind is a factor and windows are to be used for ventilation
a. The windows on the leeward side should be opened first followed by opening the windows on the windward side
b. The windows on the windward side should be opened first followed by opening the windows on the leeward side
c. Only the windows on the leeward side should be opened
d. Only the windows on the windward side should be opened
a. The windows on the leeward side should be opened first followed by opening the windows on the windward side.
When the roof is opened for ventilation
a. The windows on all floors should be opened immediately after the roof is opened
b. The windows on the top floor should be opened after the roof is opened
c. The windows in the building should remain closed if possible
d. The windows on the fire floor should be opened after the roof ventilation is complete
b. The windows on the top floor should be opened after the roof is opened
When windows on several stories must be
opened via a fire excape of other exterior access, firefighters should
a. Open the window in the most expeditious manner
b. Begin at the fire floor and work upward
c. Begin at the top floor and work downward
d. Begin at the lowest floor and work upward
c. Begin at the top floor and work downward.
In a factory building, rows of skylights are normally located over
a. Work areas
b. Large open stairways
c. Bathrooms
d. Corridors
a. Work areas
The least desirable way to use a skylight for ventilation is by
a. Entirely removing the skylight by lifting it off of its opening
b. Removing three sides and tipping the skylight by using the fourth side as a hinge
c. Breaking the glass or plastic in the skylight
d. Any of the above is equally safe and effective
c. Breaking the glass or plastic in the skylight.
To ensure that firefighters do not fall through the opening created when a skylight is lifted away
a. The skylight should be placed back over the opening as soon as the first heavy volume of smoke is released
b. The skylight should be placed back over the opening at a right angle to the original placement
c. Lay the skylight upside down on the roof near the opening
d. Skylight should not be lifted off the opening; it is better to either remove the glass/plastic or use the tip method
c. the skylight upside down on the roof near the opening.
When opening the roof for ventilation, firefighters should
a. Keep their back to the wind
b. Keep their backs or side to the wind and wear full PPE and SCBA
c. Wear full PPE and SCBA and approach the fire from the side they entered regardless of wind conditions
d. Keep their face of side to the wind and wear full PPE and SCBA
b.Keep their backs or side to the wind and wear full PPE and SCBA.
It is best to cut a plywood roof using a
a. Power saw
b. Chisel head axe
c. Flat head axe
d. Pick axe
a. Power saw.
A large single ventilation hole in the roof is preferred over several smaller holes because
a. It is more effective
b. Is safer for the firefighters
c. It requires less cutting
d. All of the above
d. All of the above
When cutting roof boards for ventilation
a. Pull up each board as it is cut
b. Wait until all boards are cut before pulling up any roof boards
c. Pull up all boards on one side of the cut before proceeding to the other side to compllete the cut
d. Pulling up roof boards as they are cut or waiting until all are cut to pull them up is a matter of personal preference and has no effect on safety or efficiency
b. Wait until all boards are cut before pulling up any roof boards.
