Chapter 5 Flashcards
Equipment / hose lay
What is a valuable document(NFPA “”) that defies the requirements for new automotive Fire apparatuses designed to be used under emergency conditions to transport personnel equipment to support the suppression of fire and mitigate that hazardous situation
NFPA 1901 ( must read document for anyone assigned to engine company)
The engine itself should be equipped with a pump having a rated pumping capacity of no less than ‘’ and at least ‘’ gallons
750 gallons per minute any water tank that carries at least 300 gallons of water NOT
The majority of Fire apparatuses have a pump rated at
1500 gallons per minute and a tank capacity of 500 gallons P. 150-51 NOT
A pumper is not a
Tender P. 152
What are used to control flow of water in a stand Pipe?, hose and pipes going into and out of the pumper.
Valves
Three commen types of valves found on an engine apparatus are
Ball valves
Gate valves
Butterfly valves
What is an in-line valve that has an internal plastic or steel component shape like a ball and is the values for the discharge port on the pumper? The ball has a hole through its center and all allows water to flow through it when the ball is in the open position no water is allowed to float through it and the clothes position.
ball valve. 163
Gated wye I can be used as a Siamese but
Siamese can never be used as a wye
A butterfly valve is the same as a
Morris gate p. 164
What are used to connect two threaded connections of the same size and same threads they are needed when a pumper sets up a forward lay, uses a reverse lay and vice versa
Double male couplings, and double female couplings
NFPA ?? Requires at a minimum that the following ladders be carried on an apparatus:
One straight roof ladder with hooks 12 feet
One extension ladder 24 feet
One folding attic ladder
1901 p. 165
Various types of foams are
Class A
Class B
Universal extinguishing foam
Class, what foams are used on fuels like paper, wood cardboard, textiles in organic vegetation such as grass, brush, trees, and straw
Class A
Class, what foams used on fires involving flammables like gasoline, diesel, and other hydrocarbons flammable liquids
Class B
Various type of class ‘’ foams:
Protein foam
Fluoroprotein foam
Film foaming Fluoro protein foam FFFP
Aqueous film forming foam AFFF
alcohol resistant foam
B
A modern formula that works on both class A and B fires that is especially suited for class a fires, but it is still effective on Class B flammable liquids
Universal extinguishing foam p. 176
What is a typical foam used on most fire apparates to combat class fires A and some class B fires:
low expansion foam
Low expansion foam has an expansion ratio of less than
20 -1 with no specialized air aspirated nozzles required NOT
Medium expansion expansion ratio
20-1 and 200-1 it requires air aspirated nozzle to produce the foam NOT
Hi expansion foam has an expansion ratio between
200-1 and 1000-1NOT
What type of foam is excellent for extinguishing stubborn a basement fires
Hi expansion foam
Difference between class A and class B foams
The way these two foams extinguish the Fire
Class B- water is needed to mix the proper foam solution ratio and water is also the vehicle to deliver the product into the fire, a film is formed over the surface of the barren and gasoline to stop in prevent further release flammable vapors( film barrier must remain intact) FOAM IS DominANT
Class A - water is the dominant extinguishing Agent not the foam the foam enhances the effectiveness of the water by creating bubbles does increasing the heat absorption service area of the water droplets p. 178
Research by NIST has determined that droplets measuring between ‘’’ microns or more efficient and absorbing heat then where the larger heavier droplets
250-350 NOT
an ‘’ agent is one that can render a fuel non-flammable by encapsuling the hydrocarbon molecules. When added to surfactants these agents emulsify grease , petroleum hydrocarbons, paint and other barriers to water penetration
emulsifying agents p. 178
What class of foams do not contain emulsifying agents
class b ( if they did foam blankets would sink to the bottom of the flammable liquids instead of floating on top) p. 178
Class, what foams breakdown the surface intention of water, making it more effective and extinguishing fuels
ClassA p. 179
Class ‘’ foams can prep and protect threatened structures in wildland/urban interface fires
class A p. 180
Company officer who decider to use pre-connected classA foam attack line when it’s known that ventilation may be delayed is making a
Wise move( thoroughly wedding the burning fuel the fire triangle is quickly broken) p. 181
Primary damage refers to the damage that just caused directly by
The fire
Secondary damage is damage caused directly by
Firefighters efforts
What is the complete extinguishment of fire and usually starts after the initial fire is knocked down it involves looking for hidden fires and wall ceilings and void spaces that are still causing primary damage
Overhaul
What is an advanced method of making class A foam solution
CAFS
compressed Air foam
P. 182
What are the four basic hose lays for establishing a water supply?
Forward LAY
Split lay
Direct to engine
Reverse Lay
the most advantageous hose lay is the
Forward lay from hydrant to fire
Which lay helps engine companies comply with the two in two out rule
Forward lay p. 183
Most rooms in content fires in the incipient or early growth the stage are extinguished with less than how many gallons of water
100 gallons of water
Water approach is when a supply line is laid from a hydrant to the fire, but the line is left uncharged for another company to hook up to the hydrant in charge of the supply
forward lay - dry p. 184
What lay is a dry forward, lay by the first arriving engine. The only difference is there is no hydrant to wrap or no water source at the T intersection
Split
Because the first engine lays forward and the second engine lays reverse it’s called a
split Lay
Which lay is useful when long, narrow driveway limit axis road without hydrants or dead ends hamper operations at a fire building
Split lay
Fast water from the tank without supply can be safe and effective procedure only when the fire is in what stage’’, can be extinguished with ‘’ gallons or less and at least ‘’’ companies arrive ?
The fires in the incipient stage or early in the growth stage, it could be extinct for 500 gallons or less
At least two companies are sure arrival p186
’’ of direct to engine no line laid approach are:
1. first arriving engine go directly to the fire
2. Can use pre connects
3. Knocking down the fire with tank water lowers the temperature inside the structure.
Advantages
’’’ of the direct to engine no line laid approach:
1. Operation doesn’t work unless companies arrive close together.
2. Too many companies are required to provide one engine company with the continuous uninterrupted water source.
3. Little or no margin of safety for interior attack Cruise.
4. tank Water might run out p. 188-189
Disadvantages
What lay can sometimes come in handy for grass and small brushfires so it’s good to know about it
Reverse lay
Most efficient way to lay reverse is using a:
T
PH
M-LDH
Trigate
Portable hydrant
Manifold connected to an LDH
and LDH provides more volume less friction loss to the
Manifold p. 190 -91
How many engine companies are required to perform the dry
forward hose lay
2 NOT
The GATE VALVES and BUTTERFLY VALUE use CONTROL WHEELS to open/close the valve. They are primarily used on ‘’’ port of the Pumper
Intake
When a lever on a ball valve is perpendicular to the hose, the valve is
Shut
Which type of valve is used for the discharge ports on the
pumper
BALL VALUE
About how much tail must remain when performing a dry
forward hose lay
15 FT NOT
Which NFPA document defines the requirements for new automotive
fire apparatus designed to be used under emergency
conditions to transport personnel and equipment, and to
support the suppression of fires and mitigation of
hazardous situations?
NFPA 1901
Regarding ‘’’ the LDH coupling should be a 3 1/2 inch, 4 inch or storks coupling
split lays
What have tests shown is the reason that Class A foam
increases the effectiveness of water from 3 to 15 times
over that of plain water by reduction of ‘’
Reduction of surface tension of water
Who are the most important people to consult for valuable
input before purchasing fire apparatus and equipment?
FF
Up to what percent concentration of foam is used with
compressed air foam systems?
1 % NOT
Which type of valve is used for the discharge ports on the
pumper?
p. 163
BALL VALUE
In lever rotates ‘’’ to open the gate and rotates ‘’’’’ to close it regarding hydrant..
counterclockwise
clockwise
A ball valve controls the water through the
Hose
All valves must be opened and closed ‘’’’ to prevent waterhammer
Slowly and slowly
