Podcast
Questions and Answers
Natural ventilation is based on the natrual action of _____ gases
Natural ventilation is based on the natrual action of _____ gases
Heated
_______ ventilation can involve hoselines, portable fans and building ventilation systems, depending on the resources and Fire situation
_______ ventilation can involve hoselines, portable fans and building ventilation systems, depending on the resources and Fire situation
Mechanical
Venting using a ___ or ____ stream is one of the earliest and simplest means of mechanical ventilation.
Venting using a ___ or ____ stream is one of the earliest and simplest means of mechanical ventilation.
Fog spray
Several factors affect how much air, and thus smoke, the stream can move. 1. Is the _____ of water and 2. Is the ____ of the stream which is a function of the pattern of the stream and the nozzle flowing pressure
Several factors affect how much air, and thus smoke, the stream can move. 1. Is the _____ of water and 2. Is the ____ of the stream which is a function of the pattern of the stream and the nozzle flowing pressure
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The pattern that moves the most air is generally one that is tight enough to move the stream and the gas out of the area and yet wide enough to entrain large amounts of air. Generally this is in the range of about a __ degree fog pattern
The pattern that moves the most air is generally one that is tight enough to move the stream and the gas out of the area and yet wide enough to entrain large amounts of air. Generally this is in the range of about a __ degree fog pattern
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The final factor is the _____ of the opening and the stream. By standing back ___ ft from the window or door and adjusting the pattern to just cover the opening, your will create a ____ effect
The final factor is the _____ of the opening and the stream. By standing back ___ ft from the window or door and adjusting the pattern to just cover the opening, your will create a ____ effect
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In the case of a well involved commercial area of ____ size, to get 6-8 ft away from the window might mean passing a lot of smoldering material. In this case mover farther back
In the case of a well involved commercial area of ____ size, to get 6-8 ft away from the window might mean passing a lot of smoldering material. In this case mover farther back
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You should use the hose for ventilation in situations like ____ fires where water damage is a concern, in areas of ___ water supply or below freezing temps
You should use the hose for ventilation in situations like ____ fires where water damage is a concern, in areas of ___ water supply or below freezing temps
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Smoke ejectors, blowers and fans have problems develop regarding the availability of ___ supply, ____ requirements, storage space and wether _____ gas is present
Smoke ejectors, blowers and fans have problems develop regarding the availability of ___ supply, ____ requirements, storage space and wether _____ gas is present
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For the first ___ or so years of mechanical ventilation the most common use was exhaust devices
For the first ___ or so years of mechanical ventilation the most common use was exhaust devices
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_____ results in some of the air from the outside being drawn into the building around the side of the fan, only to be blown out again through the fan
_____ results in some of the air from the outside being drawn into the building around the side of the fan, only to be blown out again through the fan
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Positive pressure ventilation was originally tested as a way of reducing _____ that is drawing of fire and heat and smoke toward staircases. ____ department has expanded on these experiments and proved it’s usefulness of the concept on many structures
Positive pressure ventilation was originally tested as a way of reducing _____ that is drawing of fire and heat and smoke toward staircases. ____ department has expanded on these experiments and proved it’s usefulness of the concept on many structures
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PPV has many advantages over negative pressure. The first is ____. PPV is set up outside the structure ___ ft away. Large doors may require _____ fans
PPV has many advantages over negative pressure. The first is ____. PPV is set up outside the structure ___ ft away. Large doors may require _____ fans
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A fan blowing in can move almost ___ as the volume of smoke as compared to the negative mode, especially if ____ occurs
A fan blowing in can move almost ___ as the volume of smoke as compared to the negative mode, especially if ____ occurs
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Work with wind not against it. This works best with ____ to moderate fires where ___ rather than fire is the greatest difficulty
Work with wind not against it. This works best with ____ to moderate fires where ___ rather than fire is the greatest difficulty
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Mattress, stuffed ____ and extra Smokey fires, such as those partially extinguished by sprinkler systems are prime candidates for ___
Mattress, stuffed ____ and extra Smokey fires, such as those partially extinguished by sprinkler systems are prime candidates for ___
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One disadvantage of PPV is fanning smoldering fires into larger ones. One possible situation is at ____ fires where fires may be in ____ locations
One disadvantage of PPV is fanning smoldering fires into larger ones. One possible situation is at ____ fires where fires may be in ____ locations
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PPV must not be used if FFs are entering the building from any points other than where the ___ is operating
PPV must not be used if FFs are entering the building from any points other than where the ___ is operating
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If there are many openings in close ____ to the door being used for PPV, the smoke filled area may receive ____ ventilation as the fresh air simply _____ to the outdoors
If there are many openings in close ____ to the door being used for PPV, the smoke filled area may receive ____ ventilation as the fresh air simply _____ to the outdoors
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A basic tenet for interior firefighters search for a life hazard is to ___ as you move, provided the fire won’t be ____ by the venting. This is the opposite pattern desired to make PPV work most effectively
A basic tenet for interior firefighters search for a life hazard is to ___ as you move, provided the fire won’t be ____ by the venting. This is the opposite pattern desired to make PPV work most effectively
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The ic should know what degree of ____ is present before starting the can.
The ic should know what degree of ____ is present before starting the can.
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The ic must know what _____ factors exist in the vicinity of the fan.Examples are dust, ____ weeds or other materials that might be drawn into the fan
The ic must know what _____ factors exist in the vicinity of the fan.Examples are dust, ____ weeds or other materials that might be drawn into the fan
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To stop PPV simply ___ the fan away from the building
To stop PPV simply ___ the fan away from the building
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The IC must know what ___ equipment is available. Will the power supply create any issues at the command post such as ____ or ____ fumes
The IC must know what ___ equipment is available. Will the power supply create any issues at the command post such as ____ or ____ fumes
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When heated gas is restrained from rising, it spreads out horizontally and then starts to bank down—- this is called the ____ effect
When heated gas is restrained from rising, it spreads out horizontally and then starts to bank down—- this is called the ____ effect
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There are several ways to prevent this horizontal spread; build a fire resistive ____ or position a countering ____, but perhaps the most efficient and effective way is to let the gas continue on its upward journey.
There are several ways to prevent this horizontal spread; build a fire resistive ____ or position a countering ____, but perhaps the most efficient and effective way is to let the gas continue on its upward journey.
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The most common vertical artery is the ____
The most common vertical artery is the ____
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If the fire has already self vented a window in the fire ____, opening the roof ____ over the stair could cause the fire to be drawn toward the staircase if the apartment door is open
If the fire has already self vented a window in the fire ____, opening the roof ____ over the stair could cause the fire to be drawn toward the staircase if the apartment door is open
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The danger with vertical ventilation as with horizontal ventilation, depends on the building ____ and wind ____
The danger with vertical ventilation as with horizontal ventilation, depends on the building ____ and wind ____
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The bulkhead team should be in ____ contact with people at the fire apartment door.
The bulkhead team should be in ____ contact with people at the fire apartment door.
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The bulkhead door must be checked for overcome ____ who may have attempted to flee to the roof. After ensuring the opening will not endanger the interior team, ____ the door from its hinges to prevent it from closing
The bulkhead door must be checked for overcome ____ who may have attempted to flee to the roof. After ensuring the opening will not endanger the interior team, ____ the door from its hinges to prevent it from closing
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Lean the bulkhead door against the wall at roughly a ___ degree angle. Use it as a ramp to reach the top of the bulkhead which can be ___ ft above the roof level. Secure with _____ at the base of the door, turn the fork end parallel with the door to get it out of the way
Lean the bulkhead door against the wall at roughly a ___ degree angle. Use it as a ramp to reach the top of the bulkhead which can be ___ ft above the roof level. Secure with _____ at the base of the door, turn the fork end parallel with the door to get it out of the way
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Dumbwaiters are small ____ operated mini elevators that were common in multistory residential buildings built in the late ____ and early ____. The purpose was to lower the tenants trash down to the basement for collection
Dumbwaiters are small ____ operated mini elevators that were common in multistory residential buildings built in the late ____ and early ____. The purpose was to lower the tenants trash down to the basement for collection
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Dumbwaiters have been replaced with ____ and _____. Often Dumbwaiters were equipped with miniature _____ at the top complete with a door and skylight
Dumbwaiters have been replaced with ____ and _____. Often Dumbwaiters were equipped with miniature _____ at the top complete with a door and skylight
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The second most common vertical avenue is the _____. Commonly found behind kitchen and ____ walls, these shafts extend right up to the underside of the roof boards, where a single vent pipe extends through the roof called the soil pipe
The second most common vertical avenue is the _____. Commonly found behind kitchen and ____ walls, these shafts extend right up to the underside of the roof boards, where a single vent pipe extends through the roof called the soil pipe
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Check the entire route of the pipe chase for extension on each floor above the fire, as well as the ___ of the shaft
Check the entire route of the pipe chase for extension on each floor above the fire, as well as the ___ of the shaft
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Fires within void spaces are often extremely ____ because oxygen available to the fire is limited
Fires within void spaces are often extremely ____ because oxygen available to the fire is limited
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Fires within void spaces will require ____ ventilation.
Fires within void spaces will require ____ ventilation.
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