Quiz 2 Practice

Attack hose
Used by trained professionals min 1-1/2 in O
OFD uses 1-3/4
Medium Diameter Hose
2-1/2 in or 3 inch hose
Supply line (Large Diameter hose)
3 1/2 inch hose or bigger used to move water from one engine to another or from the water source to a portable hydrant for distrbution At OFD not all engines carry 5 in therefore 3 to 5 in is considered a supply line
Occupant use hose
Hose used in standpipe systems for occupants to fight incipient fires
Jumper lines15 foot used as supply lines
At OFD are short sections of three-inch hose
Hose construction
Inner liner, inner reinforcement, outter jacket
Types of Hose Material
Synthetic cotton jacket
Rubber covered (OFD bosster)
Care and Maintenance of Fire Hose
Aviod Laying over rough corner
Remove kinks prior to charging the line
Do not allow traffic to run over line
Avoid burining embers and chemicals
Avoid Water Hammers
Hose Loads
Dutchman: Short fold of hose or a reverse fold that is used when loading hose
Accordion load
Flat Load
Horseshoe load
Nozzle Theory
Direct attack method: Water to base of flame
Indirect method: finely divided stream of water particles (fog) into the hotest part of the fire, the overhead , and then allow time for the resultsing heat absorbing conversion of water into stream to reduce heat and extinguish the fire
Nozzle Basics
Control flow, provide reach, create shape and determine water direction

Nozzle componets: Shut off and stream shaping device

Smooth Bore Nozzle
Less pressure at same flows
Great penetration into high heat areas
Not likely to be clogged by debris
Does entrain great amount of air and doesn’t push fire around as much as combination nozzle
Combination Nozzle
Absob wide range of nozzle pressures with a stream of effective reach
Spray pattern can easil;y cover a large area more qucily
Gentle w/less damage
Good for indirect attack
good for forced ventilation operations due to great volume of air
Low pressure Nozzles
Less nozzle reation
Reduced engine and nozzzle pressures causes hose to be less stiff and easier to maneuver in hallways
Low-pressure nozzle water droplets tend to be larger than tehe droplets exiting the standard-pressure nozzle
OFD Nozzles
Akron 4714 and 4824 (1 1/2 AND 2 1/2)
bOTH AUTOMATIC AND CONSTANT GALLONAGE FEATURES
cONTROL OF THE FLOW BY PUMP OPERATOR
4714 150 gpm AT 50 psi
4824 250 gpm AT 50 psi
BACK UP V SECOND LINE
A backup line is used to protect the crews who are fighting the fire; If all is weel, the back-line will be charged but not actually flowing water

A second line is actually flowing water to help suppress the fire

Ears
Ears are placed in hose folds to assist with hose deployment. If loaded correctly; the fire ear (llop) will give you 5 feet of hose and nozle at the front doown
OFD min flow
150 galls per minue (GPM)
OFD Hose Compliment
100 feet of 1 1/2 hose with low-pressure nozzle on the front bumper

150 feet of 1 3/4 hose with lowpressure nozzle on front cross lay

200 feet of 1 3/4 hose with low pressure nozzle on rear cross lay

200 feet of 2 1/2 inch hose with lowpressure nozzle in rear hose bed

300 feet of 1 3/4 inch hose with smooth-bore nozzle in rear hose bead

The four componets of a water supply system
The source of the supply
The processing or treatment facilities
The means of moving the water
The distribution system
Three ways of moving water
Direct pumping
Gravity
Combination (City of Oakland)
Types of pressure
Static (Stored potiential energy)
Flow (Moving)
Residual (Part of the totoal that is not used to overcomefriction or gravity)
Normal Operations Pressure found during normal consuption
Velocity
The rate of speed the water moves through the pipe or hose
Friction loss
The loss of pressure due to resistance to motion between the water and the inside of hte hose or pipe

Increase size of hose to increase

EBMUD
Response to 3 alarms or more
Gate Pot Covers
Red: Closed Zone Valve
Blue: Open Valve
White: Hydrant gate valve
Regulator
A pressure regulating (reduceing) valve a station that reduces water pressure to serve a lower zone that can’t be gravity feed
City of Oakland source of water
Pardee Reservior
Dead end Hydrant
A fire hydrant which receives water from only one direction
Cieculating Feed
Hydrant with two or more directions of feed.
Gridded Water distribution systems
Primary
Secondary
Distribution
arrow on hydrant
Hydrant is on a dead end main
arrow on hydrant pointing to a line
Hydrant is the last hydrant on a dead end main
Hydrant Colors
White
Yellow
Green
Red
White: EBMUD
Yellow: Military
Green: Airport/Regional Parks
Red: Private
Cap/top Colors
Red
White
Green
Red: 0-50 psi
White: 51-119 psi
Green: 120+ psi
Top of Colors (GPM of Hydrant)
Red
Orange
Green
Blue
Red: 0-500 gpm
Orange: 501-999 gpm
Green: 1000 -1499 gpm
Blue: 1500+ gpm
Zone to Zone Plumbing
Red Hydrant and Discharge Hydrant (White) No more than 10 psi over normal static pressure
Friction loss limits the capcity of a hydrant by three factors
The size of the main to which the hydrant is connected (Increast size of the main)

The length of the main to the source of supply

The condition of the main

By doubling the size of the pipe, it’s carrying capacity is increased by what?
6 times
Three tpyes of Fire Hose construction
Wrapped, Braided, Woven
Fire Hose construction
Hose
Couplings
Couplings types
Threaded
Non Threaded
Blunt ends of couplings to attached them
Higbee cut
Hose tools
Accessories that help firefighters move or operate hoselines
Appliances
Devices that moving water flows through including adapters and connectors
Double Female
Allows two male end ends of hose to be connected
Double male
allows two female to be connected
Increaser
Used to connect a smaller hose to a larger one
Reducer
Connects a larger hose to a smaller one
Wye
`Device that divides one hoseline into two or more
Water Theif
One inlet and one outlet of the same size plus two smaller outlets witj all of the outlets being gated. A portable hydrant or manifod is like a water theif and may have one or more intakes
Siamese
device that connects tow or more hoseline into one line
Flat Load
Accordion Load
Horseshoe load
Minute Man
Preconneted hose loads for shoulder loads

For attack lines and supply lines

Like a horse shoe

Side load at top

Different ways of coupling hose
Foot tilt
two person
Over the Hip
Static line v. Pre Connect
?
Rigid suction
SO Vaccumm doesnt collase hose
Knot to tie off line
Clove hitch
What to bring to door
Hose line and 50 ft or one coupling
Testing proceedures for hose
Test at
Testing for hose
Before 1st use, damage for once a year
School yard
Double male and Double female Use 3 in hose
Hose jack
Stops leaks
In Service roll
Protects male end inside the roll
Hose test
250 psi or 110% of opt pressure
Cleaning
Mid Soap
Master Stream
appliances capable of 350 gpm
Nozzle types
Solid Stream
Fog
Combination
Nozzle flow
The amount of or volume of water that a nozzle will provide at a given pressure
Small diameter handlines
1 1/2 1 3/4 or 2 inches and flow from 100 to 250 gpm
medium-Diameter Handlines
2 1/2 in flowing at 165 to 325 gpm
Direct
indirect
Combination
Attack
Direct fire attacked used to attack the fire by aiming the flow of water directly at the seat of the fire

Indirect fire attach is used to attacked interior fires by applying a fog stream into a closed room or compartment

Combination blends

hydraulics
Study of fluids at rest and in motion
Smooth bore handline
Fog handline (normal)
Fog handline, mid pressure
Fog handline, low pressure
Smooth bore master stream
Fog Master
50
100
75
50
80
100
Foam
Cuts off oxygen
Protein foam
Fluoroprotein foam
Fluoroprotein fil-forming foam
Detergent-type foams
Animal biproducts
Fluorinate
Both Protein and Fluoroprotin properties combination
Synthetic surfactants
Class A fuel
Ordinary combustibles extinguished by water
Class B fuel
Flammable liquids hydrocarbons and polar solvents
Application of foam
Venturi principle
# of City of Oakland zones
33

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