Chapter 11 Flashcards
Tactical ventilation is performed during fire attack to:
A. help control the fire.
B. limit the need for LDH hose streams.
C. minimize personnel needed on scene.
D. quickly extinguish a fully developed fire
A. help control the fire.
Why is ventilation used during overhaul and loss control?
A. To help control the fire
B. Eliminate the need for respiratory protection
C. Remove soot and odours from valuable contents
D. Evacuate smoke from structures after a fire has been extinguished
D. Evacuate smoke from structures after a fire has been extinguished
When performing tactical ventilation, what action has the most impact on successful ventilation? A. Exposure protection B. Removing fuel sources C. Activating sprinkler systems D. Controlling oxygen availability
D. Controlling oxygen availability
Which action may improve visibility inside structures so that interior crews can work more effectively? A. Exposure protection B. Controlling exhaust openings C. Cooling the exterior of the building D. Increasing the number of personnel
B. Controlling exhaust openings
As fire within a compartment consumes oxygen, the amount of unburned fuel in combustion products: A. increases. B. decreases. C. stays the same. D. may either increase or decrease.
A. increases.
Why should ventilation be immediately followed by exterior or interior fire attacks to cool gases and surfaces in the fire room?
A. Fire will enter ventilation-limited decay when water is applied.
B. The ventilation crew is already in position to perform fire attack.
C. Ventilation will cause the fire to go into decay, making it easy to extinguish.
D. The greater the time between ventilation and application of water, the greater the fire’s growth
D. The greater the time between ventilation and application of water, the greater the fire’s growth
What disrupts the ventilation strategy and causes the fire to grow? A. Activating sprinkler systems B. Breaking windows unnecessarily C. Changing to a transitional attack D. Removing items from the structure
B. Breaking windows unnecessarily
Before the interior attack, what action will reduce oxygen available to the
fire?
A. Closing exterior doors and windows
B. Opening exterior doors and windows
C. Directing hose streams to the interior of the structure
D. Directing hose streams on the exterior of the structure
A. Closing exterior doors and windows
What occurs when fresh air (oxygen) from ventilation is introduced into a room, causing gases to reignite and rapid fire development to occur? A. Burst B. Decay C. Flashover D. Vaporization
C. Flashover
Which is a condition specific to tactical ventilation that should be communicated to crew members and/or a supervisor? A: Locations of overhead power lines B: Locations of building power supply C: Locations of water supply D: Locations of nearby apparatus parking
A: Locations of overhead power lines
Tactical ventilation roof crew members should have a minimum of: A: one escape location B: two escape location C: three escape location D: four escape location
B: two escape location
Nearby structures and vegetation can be ignited if \_\_\_ carries hot firebrands or embers aloft: A: diffusion B: radiation C: convection D: conduction
C: convection
Which is an indication of possible roof collapse? A: Smoke from upper windows B: Popping or crackling sounds C: HVAC units sagging or leaning D: Fire appearing to travel downward
C: HVAC units sagging or leaning
Ventilation equipment that fails inspection should be: A: used with caution B: marked out of service C: replaced as soon as possible D: used for training purposes only
B: marked out of service
Which type of ventilation requires no additional personnel or equipment to set up and maintain? A: Hydraulic ventilation B: Secondary ventilation C: Mechanical ventilation D: Natural horizontal ventilation
D: Natural horizontal ventilation
Negative pressure ventilation involves artificially lowering pressure inside the structure so that:
A: fresh air from outside will not enter
B: fresh air from outside moves in more quickly
C: smoke and fuel gases will have limited movement
D: smoke and fuel gases move toward lower-pressure openings more quickly
B: fresh air from outside moves in more quickly
Firefighters should continue to wear SCBA and monitor the environment until:
A: the incident is stabilized
B: no smoke or gases are visible
C: overhaul activities are initiated
D: the atmosphere is confirmed to be safe
D: the atmosphere is confirmed to be safe
When performing a positive-pressure attack, the exhaust openings must be located: A: in the fire compartment B: on the main floor of the structure C: on the upwind side of the structure D: on the downwind side of the structure
A: in the fire compartment
What is needed for vertical ventilation to be effective?
A: Large exhaust-to-intake ratio
B: Multiple horizontal inlet openings
C: Horizontal inlet opening above fire level
D: Horizontal inlet opening at or below fire level
D: Horizontal inlet opening at or below fire level
When performing vertical ventilation, extend ground ladders at least \_\_\_ rungs above the edge of the roof or top of the parapet wall: A: two B: three C: four D: five
B: three
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? A: Thin metal roofs B: Sheet metal roofs C: Industrial metal roofs D: Roofs built after 2000
A: Thin metal roofs
What type of nozzles can be used before ventilation to reduce the risks associated with ventilating a windowless basement? A: Fog nozzles B: Piercing nozzles C: Adjustable nozzles D: Combination nozzles
B: Piercing nozzles
Fires in windowless buildings usually require \_\_\_ ventilation for removal of smoke A: natural B: hydraulic C: mechanical D: combination
C: mechanical
When an enclosed secondary stairwell is used for evacuating occupants, what should be located at the bottom floor to pressurize the stairwell and keep smoke from entering it? A: PPV fans B: NPV fans C: Door monitors D: Both PPV fans and NPV fans
A: PPV fans
