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90 Cards in this Set
- Front
- Back
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Field Hydraulics 1 3/4" Transverse |
Flow 150' 200' ------------------------------ 30 0 0 60 5 10 95 20 30 125 35 50 150 50 70 180 75 100 200 90 120 |
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Field Hydraulics 1 3/4" WYE |
Flow Set Up FL/100' of 2.5" ---------------------------------------------- 30 100 1 60 105 5 95 115 10 125 125 15 150 135 20 180 150 30 200 160 40 |
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Field Hydraulics
2 1/2" W/Fog (100 psi) |
GPM FL/100' 2 1/2"
---------------------------------------- 120 5 240/250 15 350 25 |
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Field Hydraulics 2 1/2" W/Smooth Tip (50 psi) |
Tip Flow FL/100' -------------------------------------------- 1" 210 10 1 1/8" 265 15 1 1/4" 325 25 |
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Field Hydraulics 5" Fl/100' |
GPM FL --------------------------- 500 2 psi 1000 6 psi 1500 15 psi 2000 25 psi |
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Field Hydraulics Flamefighter |
1 3/4” NP/PSI GPM FL/100' EP 150' EP 200' ----------------------------------------------------------- 100 190 55 185 210 125 215 70 230 xxx 2 1/2” NP/PSI GPM FL/100' ------------------------------------------------------------ 100 250 15 125 275 20 150 320 25 |
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Field Hydraulics
What pressure do you maintain on sprinklers with no smoke showing? |
100psi engine pressure
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Field Hydraulics
What pressure do you maintain on sprinklers with smoke showing? |
150psi engine pressure
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Field Hydraulics
What formula do you use for standpipes? |
25psi + 5psi/floor + FL + Nozzle Pressure
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Field Hydraulics Master Streams W/Smooth Tip (80) psi |
Tip GPM Factor 1 2 3 4 -------------------------------------- 1 1/4" 400 1/2 40 10 5 3.5 1 3/8" 500 3/4 60 15 7 4 1 1/2" 600 1 80 20 10 7 1 3/4" 800 2 160 40 20 14 2" 1100 3 240 60 30 21 2 1/4" 1350 5 400 100 50 35 |
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Field Hydraulics Master Streams W/FOG Nozzles (100 psi) |
Flow Equiv Factor 1 2 3 4 --------------------------------------- 350 1 1/4" 1/2 40 10 5 3.5 500 1 1/2" 1 80 20 10 7 700 1 3/4" 2 160 40 20 14 1000 2" 3 240 60 30 21 |
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Field Hydraulics
What psi do you supply to a monitor W/Smooth tip? |
95psi
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Field Hydraulics
What psi do you supply to a monitor W/Fog? |
115psi
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Field Hydraulics Ladder Pipe |
Tip Solid Fog ---------------------------- 1 1/2" 140psi 160psi 1 3/4" 170psi 190psi 2" 200psi 220psi |
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Field Hydraulics Break Apart Nozzle |
FOG 150GPM @ 75NP SOLID 180GPM @ 50NP |
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Field Hydraulics Foam |
Class A @ 1% ------------------------------ 350' max 200psi Class B @ 3% -6% ----------------------------- 250' max 200psi |
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What is the max operating pressure of locking 5" hose?
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180psi
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True/Flase
Pumping a ladder pipe with a 2" tip is OK when connected to 5". |
False
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Smooth bore nozzle reaction formula
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NR=1.5 x D2 x NP
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Fog nozzle reaction formula
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NR=.05 x GPM x √NP
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GPM formula
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29.7 (30) x D2 x √NP
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Friction Loss formula when flowing greater than 100GPM
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FL = 2Q2 + Q
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Friction Loss formula when flowing less than 100GPM
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FL = 2Q2 + 1/2Q
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Pump discharge pressure (Engine pressure) formula
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EP = NP + FL +/- EL + AL
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Gallons per minute formula From hydrant |
GPM = 29.7 x D2 x √NP x .9 |
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Square roots of
- 50 - 80 - 100 |
50 = 7.07
80 = 8.94 100 = 10 |
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Maximum operationg pressure of double jacket, lined hose
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250psi
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Maximum operationg pressure of double jacket, unlined hose
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150psi
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Maximum operationg pressure of nonlocking 5" hose
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150psi
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Task Force Tip Nozzle GPM's
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50 - 350 GPM
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Akron Akromatic Nozzle GPM's
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60 - 400 GPM
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Fog Hog nozzle GPM's
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Up to 1000 GPM
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KK Thunder Fog nozzle GPM's
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30 - 250 GPM
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Maximum GPM's that will flow through a 2 1/2" hose
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400 GPMs
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Coeffiecients per Insurance Services Office Inc.(ISO) |
1 3/4" = 6 2 1/2" = 1 5" = .031 |
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Maximum pressure you can pump to a standpipe?
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200 psi
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How do you calculate the amount of additional water available at a hydrant?
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FInd % decrease -
[(Static - Flow) x 100]/Static Then % decrease equals - 0 -10% = 3 times the original amount 11- 15% = 2 times 16 -25% = 1 time >25% = more water may be available, but less than an equal amount of the original gpm or the 123, 321 method |
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Three functions of a nozzle
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Control flow
Provide reach Create stream shape |
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Three category of nozzles |
Smooth bore Combination - Straight stream to wide fog Special - broken -flamefighter |
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Define nonconstant gallonage (variable gallonage)
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pattern change casues gallon change
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Define constant gallonage (constant flow)
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pattern change does not cause gallon change
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Define adjustable gallonage
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constant flow -but firefighter can select the flow desired.
(KK thunderfog and Akron Turbojets) |
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Define Automatic nozzles (constant pressure or pressure regulating)
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Pressure stays the same no matter what you are sending it
(Akromatic, Fog Hog, and Task Force Tips) |
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One gallon contains how many cubic inches
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231 cubic inches
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Fresh water weighs approximately what per gallon?
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8.33lbs.
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One cubic foot of fresh water weighs approximately?
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62.5lbs.
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A cubic foot contains how many cubic inches?
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1728 cubic inches
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A cubic foot of water contains how many gallons
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A cubic foot of water contains 7.481 gallons
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A column of water one inch square and one foot high will create a downward pressure of how many psi?
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.434 psi
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At elevations above sea level the atmospheric pressure decreases approximately how many psi for every 1000 feet?
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.5 psi
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Pressure gain or loss from elevation is equal to __ psi per foot approximately, or __ psi per 10 feet.
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Pressure gain or loss from elevation is equal to .5 psi per foot approximately, or 5 psi per 10 feet.
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1 foot of lift equals how many inches of mercury?
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.885 inches of mercury
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what is maximum theoretical lift?
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33.9 feet
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Class A pumper deliver 100% of its rated capacity at what discharge pressure?
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150 psi
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Class A pumper deliver 70% of its rated capacity at what discharge pressure?
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200 psi
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Class A pumper deliver 50% of its rated capacity at what discharge pressure?
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250 psi
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What is a spurt test?
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A spurt test will test the reserve capacity of the pump and engine.
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The spurt test is done at what pressure?
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165 psi
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How long is the spurt test?
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2 minutes
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100 feet of 1 3/4" hose will contain approximately how many gallons of water and weigh what?
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12.25 gallons
102.29 lbs. |
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100 feet of 2 1/2" hose will contain approximately how many gallons of water and weigh what?
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25 gallons
208.75 |
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100 feet of 5" hose will contain approximately how many gallons of water and weigh what?
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100 gallons
835 lbs |
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During drafting how many mm/hg do you lose for every 1000 ft increase?
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1 mm/hg
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Why do we use water for fire suppression
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readily available
generally low in cost cools better than anything else |
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What is atmospheric pressure at seal level?
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14.7 psi
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True/Flase
Pump discharge = engine pressure |
True
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How many times does water expand when it turns into a gas?
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1700 times
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What pressure do we supply to forestry hose during testing? |
200 PSI |
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What is the maximum GPMs you can get out of 2 1/2" hose?
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400 GPMs
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What is the maximum pressure you can pump to a standpipe?
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200 psi
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ISO coeffiecients |
1 3/4" = 6 2 1/2" = 1 5" = .031 |
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C Q2 L coefficients |
1 3/4" = 15.5 2 1/2" = 2 5" = .08 |
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What is a BTU?
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A British Thermal Unit (BTU) is the amount of heat energy needed to raise the temperature of one pound of water by one degree F.
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90° kink flowing 140gpm can drop flow? |
55gpm |
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Horizontal angle between |
30°-34° |
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Horizontal reach formula |
HR=1/2NP + 26 |
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Vertical reach between |
60°-75° |
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Vertical reach formula |
VR=5/8NP+ 26 |
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Class A setting for dumpster/brush fires Insipiant structure fires Fully involved |
1/4 1/2 1 |
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Pumps should pull ___ of vacuum in a maximum of __ for___ and above pumpers AND a maximum of___ seconds for under____ |
20.5in in 45sec for 1500gpm 30sec for under 1500gpm |
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Pump should not lose more than__ inches of vacuum in__ min |
10in in 5min |
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If able to develop 20.5 inches of vacuum but unable to maintain for 5 minutes what should you do? |
Make note to maintenance and continue with pump test |
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Horizontal reach formula |
HR=1/2NP+26 |
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Best Horizontal reach degree |
30-34° |
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Vertical reach formula |
VR=5/8NP+26 |
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Best vertical reach degree |
60-75° |
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VR & HR formula is based of of what size tip? And what must u add? |
3/4" tip, add 5 to 26 every 1/8" |
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Break apart nozzle pressure range and max pressure |
50-10 psi and 200psi max |
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What foam eductor does TFD use? |
Akron 3095 in line eductor 3.5lbs |
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If you are using the foam tube don't go over what degrees with nozzle |
10° |
