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What are the different things to consider when selecting a hoseline?
- fire load and material involved
- volume of water needed
- stream reach needed
- number of FFs available
- need for speed and mobility
- tactical requirements
- ease of hose deployment
- potential fire spread
If a door to the fire area must be opened, all members of the hose team should....
stay low and to one side of the doorway
What is a shielded fire?
one that you cannot see from the doorway because objects are shielding it
In order to cool the hot gas layer, set the nozzle one a __ to __ degree fog pattern and direct it upward in the gas later for short bursts.
40 - 60
The most efficient use of water on free burning fires is made by what kind of attack and with what kind of stream?
- direct attack
- with solid or straight stream
To make a direct attack on the fire, a ____ stream is introduced through a small opening and directed at the ceiling where the heat is most intense.
Master streams deliver ____ gallons per minute.
It is impractical to supply a master stream with anything less than....
two 2 1/2 inch hoselines
How many firefighters are needed to deploy and supply water to a mater stream?
Once a master stream is flowing water, how many firefighters are needed to operate it?
The main ladders on most quits range in length from __ ft to __ ft.
50 ft to 75 ft
What is a quint?
- engines equipped with hydraulically operated extension ladders
- aerial apparatus equipped with a pump
What is an aerial ladder?
apparatus equipped with hydraulically operated extension ladder
Most aerial ladders manufactured in North America range in length from __ feet to ___ feet.
50 feet to 153 feet
Articulating aerial platforms manufactured in North America range in length from __ feet to __ feet.
55 to 85
What is a water tower?
engines (pumpers) equipped with hydraulically operated booms that are dedicated to applying water
Most water towers range in length from __ to __ feet in length.
50 to 130
Define flammable liquids.
those that have a flash point of less than 100 degrees
True or False - Flammable liquids can be ignited without being preheated.
What are some of the precautions FFs should take when attacking large fires involving flammable and combustible liquids?
- avoid standing in pools of fuel or runoff water
- PPE soaked with flammable or combustible liquids must be taken out of service until it is thoroughly cleaned
- Protective clothing can absorb fuel and lead to skin irritation or the clothing igniting
FFs should not extinguish fires burning around relief valves or piping unless...
the leak can be stopped
What is a Boiling Liquid Expanding Vapor Explosion?
the rapid vaporization of a liquid stored under pressure upon release to the atmosphere following major failure of its containing vessel. The failure of the containing vessel is the result of over-pressurization caused by an external heat source causing the vessel to explode into two or more pieces
What should be used to control flammable liquid fires?
Water should be used on Class B fires for what?
- to protect exposures
- as a cooling agent to control class b fires
- to move class b fuels to areas where they can burn safely or where ignition sources are more easily controlled
Natural gas in its pure form is _____, which is flammable but nontoxic.
Even though natural gas is classified as nontoxic, it is an asphyxiant because...
it displaces normal breathing air in confined space and can lead to suffication
What is added to natural gas in order to give it an odor.
What are the two main gases in the liquified petroleum gas category?
butane and propane
What should the FF do if gas is burning?
do not extinguish the fire, use hose streams to protect exposures
What is the name for the shutoff valve on gas pipes?
What is PCB?
- polychlorinated biphenyl
- toxic compound found in some older oil-filled electric transformers
What should the FF use to extinguish fires in transformers at ground level?
dry chem or carbon dioxide extinguishers
What is the most serious hazards with underground transmission systems?
explosions caused by fuses blowing or short-circuit arcing that ignites accumulated gases
What are some of the consequences of electrical shock?
- cardiac arrest
- respiratory arrest
- involuntary muscle contractions
- surface or internal burns
- joint damage
- UV burns to eyes
What is a lockout/tagout device?
a positive control to ensure the electrical device cannot be turned back on
How can combustible metal fires be recognized?
brilliant white light that is given off until ash later covers the burning material
Combustible metal fires can burn at temperatures greater than...