IFSTA Ch 11 Questions and Answers
(Graded A)
A safety precaution when performing vertical ventilation is to work:
Select one:
a. only near the center of the roof.
b. with the wind at your back or side to protect yourself from heat, smoke, and embers.
c. only near the corners of the roof.
d. facing the wind so you can better see any changes in fire behavior. - ANSWER-with
the wind at your back or side to protect yourself from heat, smoke, and embers.
For what situation would an incident commander order a trench cut?
Select one:
a. Victims are trapped on upper floors
b. The main fire is igniting nearby exposures
c. The main fire is too large to extinguish
d. Structural collapse is likely - ANSWER-The main fire is too large to extinguish
Negative pressure ventilation involves artificially lowering pressure inside the structure
so that:
Select one:
a. smoke and fuel gases will have limited movement.
b. fresh air from outside will not enter.
c. fresh air from outside moves in more quickly.
d. smoke and fuel gases move toward lower-pressure openings more quickly. -
ANSWER-fresh air from outside moves in more quickly.
Which action may improve visibility inside structures so that interior crews can work
more effectively?
Select one:
a. Exposure protection
b. Increasing the number of personnel
c. Controlling exhaust openings
d. Cooling the exterior of the building - ANSWER-Controlling exhaust openings
What ventilation tool would be used to break windows or chop holes through roof
decking?
Select one:
a. Pike poles
b. Power saws
c. Axes
d. Chain saws - ANSWER-Axes
, What occurs when fresh air (oxygen) from ventilation is introduced into a room, causing
gases to reignite and rapid fire development to occur?
Select one:
a. Flashover
b. Vaporization
c. Decay
d. Burst - ANSWER-Flashover
Roofs with several layers of composition shingles or other roof coverings:
Select one:
a. can use sounding as the only means to determine stability.
b. may sound solid even though fire may have severely damaged roof supports.
c. cannot be sounded and shingles must be removed to reveal underlying structure.
d. will not sound solid when any damage has occurred. - ANSWER-may sound solid
even though fire may have severely damaged roof supports.
When ventilating metal roofs, which type of roof can be sliced open with an axe, carbide
tip chain saw, or rotary saw and peeled back?
Select one:
a. Roofs built after 2000
b. Industrial metal roofs
c. Thin metal roofs
d. Sheet metal roofs - ANSWER-Thin metal roofs
When using natural ventilation, the amount of time firefighters have to use the improved
conditions:
Select one:
a. is generally five to ten minutes.
b. is generally three to five minutes.
c. may be less than a minute.
d. is unlimited. - ANSWER-may be less than a minute.
When performing positive-pressure ventilation,:
Select one:
a. firefighters can set up PPV blowers without entering the smoke-filled environment.
b. firefighters must use horizontal ventilation.
c. firefighters must enter the smoke-filled environment to set up PPV blowers.
d. exposures are at a much greater risk of fire spread. - ANSWER-firefighters can set up
PPV blowers without entering the smoke-filled environment.
Negative-pressure ventilation requires that the opening around the fan:
Select one:
a. allow hose streams to fit through the opening.
b. be sealed to prevent outside air from being drawn in around the fan.
c. be at least six inches to allow outside air to be drawn in around the fan.
(Graded A)
A safety precaution when performing vertical ventilation is to work:
Select one:
a. only near the center of the roof.
b. with the wind at your back or side to protect yourself from heat, smoke, and embers.
c. only near the corners of the roof.
d. facing the wind so you can better see any changes in fire behavior. - ANSWER-with
the wind at your back or side to protect yourself from heat, smoke, and embers.
For what situation would an incident commander order a trench cut?
Select one:
a. Victims are trapped on upper floors
b. The main fire is igniting nearby exposures
c. The main fire is too large to extinguish
d. Structural collapse is likely - ANSWER-The main fire is too large to extinguish
Negative pressure ventilation involves artificially lowering pressure inside the structure
so that:
Select one:
a. smoke and fuel gases will have limited movement.
b. fresh air from outside will not enter.
c. fresh air from outside moves in more quickly.
d. smoke and fuel gases move toward lower-pressure openings more quickly. -
ANSWER-fresh air from outside moves in more quickly.
Which action may improve visibility inside structures so that interior crews can work
more effectively?
Select one:
a. Exposure protection
b. Increasing the number of personnel
c. Controlling exhaust openings
d. Cooling the exterior of the building - ANSWER-Controlling exhaust openings
What ventilation tool would be used to break windows or chop holes through roof
decking?
Select one:
a. Pike poles
b. Power saws
c. Axes
d. Chain saws - ANSWER-Axes
, What occurs when fresh air (oxygen) from ventilation is introduced into a room, causing
gases to reignite and rapid fire development to occur?
Select one:
a. Flashover
b. Vaporization
c. Decay
d. Burst - ANSWER-Flashover
Roofs with several layers of composition shingles or other roof coverings:
Select one:
a. can use sounding as the only means to determine stability.
b. may sound solid even though fire may have severely damaged roof supports.
c. cannot be sounded and shingles must be removed to reveal underlying structure.
d. will not sound solid when any damage has occurred. - ANSWER-may sound solid
even though fire may have severely damaged roof supports.
When ventilating metal roofs, which type of roof can be sliced open with an axe, carbide
tip chain saw, or rotary saw and peeled back?
Select one:
a. Roofs built after 2000
b. Industrial metal roofs
c. Thin metal roofs
d. Sheet metal roofs - ANSWER-Thin metal roofs
When using natural ventilation, the amount of time firefighters have to use the improved
conditions:
Select one:
a. is generally five to ten minutes.
b. is generally three to five minutes.
c. may be less than a minute.
d. is unlimited. - ANSWER-may be less than a minute.
When performing positive-pressure ventilation,:
Select one:
a. firefighters can set up PPV blowers without entering the smoke-filled environment.
b. firefighters must use horizontal ventilation.
c. firefighters must enter the smoke-filled environment to set up PPV blowers.
d. exposures are at a much greater risk of fire spread. - ANSWER-firefighters can set up
PPV blowers without entering the smoke-filled environment.
Negative-pressure ventilation requires that the opening around the fan:
Select one:
a. allow hose streams to fit through the opening.
b. be sealed to prevent outside air from being drawn in around the fan.
c. be at least six inches to allow outside air to be drawn in around the fan.
