Hydrolics Flashcards
What is the friction loss for deck gun
400 GPM 5 500 GPM 8 600 GPM 12 800 GPM 21 1000 GPM 32
What is the friction loss for ladder pipes, water towers, and standpipes
25 to 75 PSI
What pressures do you pump master stream fog nozzle
500 GPM 92 NP
750 GPM 96 NP
1000 GPM 100 NP
The master stream is over how many GPM
400 GPM
What is theoretical lift
33.8 feet = (14.7 psi)(2.3 ft)
What is practical lift
20 to 25 ft
For every 1000 FT gain in altitude how much loss of lift is created
1ft
What is the formula for friction loss
FL = CQ2L
What is the formula for determining extra water
Static-residual (100)/static
What is the formula for static unknown
(R1-R2)/2+ R1
What are the steps for relay pumping
- determine friction loss/100 FT
- Dist./pumper=(available pressure)(100)/fl/100
- # pumpers=(total dist.)/(dist./pumper)
- Spacing=(total dist.)/(#pumpers)
- Add attack pumper
- Determine spacing starting at source
- Determine PDP: (fl/100)(distance pumped)+50PSI
What is the friction loss for a portable monitor
400 GPM 6 500 GPM 9 600 GPM 13 800 GPM 23 1000 GPM 36
What is the intake pressure desired at each engine during relay pumping
50 PSI
What is the max pressure for 4” hose
185 psi
What is the formula for height of lift
1.13in hg (in hg)
What are the coefficients for 1”-5” and duels
1" 500 1.5" 22 1.75" 11 2.5" 1.5 3" .7 4" .15 Duels .07 5" .06
What is the formula for fog nozzle actual GPM
(.1)(sq root of P) (GPM rated)
What is the GPM estimated for fog nozzle
GPM rated-(.15) (gpmr)
What is the formula for GPM actual tip
29.7 X diameter squared X the square root of the nozzle pressure
What do you pump a master stream Straight tip at?
80PSI
What is the friction loss for a wye and Siamese
10 PSI
How high will 1 psi raise water
2.3 ft
Add how many PSI for each floor above the first
5 PSI
PDP
TFL+-HP+NP
What is the GPM formula for a sprinkler head
.5P + 15
What is the friction loss for stand pipe
25PSI
When flowing between two identical lines to a Siamese how do you figure
Divide the flow by two and figure from there
When pumping up or down hill what pressure do you add/subtract
.5 PSI ft
What pressure do you pump the sprinkler system
150 psi
Where should the engine be when pumping a sprinkler system
At the hydrant to overcome friction loss and the lines between hydrant in the FDC
What is the friction loss for a water tower
25 psi
What is the formula for determining the net pump pressure
Discharge pressure- intake pressure
What is the formula for determining net pump pressure at a draft
(Dis pres) +.5 height of lift
What is the initial pressure from relay pumping operations
150 psi
What is the shutdown procedure for relay pumping
Attack engine throttle down take the pump out of gear and lets the water continue to flow. The next engine follows the same procedure in addition to opening an additional discharge, this continues until the source engine is reached and shut down
Where is the largest capacity pump replaced in a pumping operation? Smallest?
Largest at source
Smallest as fire attack or last
How do you figure pressure available to overcome friction loss
Available pressure -20 PSI
How do you figure percent drop
Static pressure minus residual pressure times 100 divided by static pressure
Pumping like lines decrease in intake pressure: 0 to 10% 10.01-15% 15.01-25% 25.01+
3
2
1
Less than 1
What is the formula for determining the nozzle reaction on a tip
29.7 diameter squared times the square root of the nozzle pressure
What is the formula for determining the nozzle reaction on the
.05 times the GPM times the square root of the nozzle pressure
What is the formula for determining GPM at a hydrant
29.7 times diameter squared times the square root of the nozzle pressure times .09 for friction loss in the hydrant
What is the formula for determining the available flow at 20 PSI from hydrant
Square root of static -20 divided by static minus residual times the observed flow times .9
What is the formula for determining gallons in a cylindrical tank
diameter squared times six times length
What is the formula for determining gallons in a rectangular tank
Length times with times height times 7.5 gallons per cubic foot
How much is a gallon of water weigh
8.33 pounds
What percent foam do we apply AFFF to a petroleum fire
3%
What percent do we apply AFFF to a polar solvent fire
6%
What is the formula for determining how much Light water will be required
Gallons times minutes times percent mix
Gallons per minute for light water
Minutes times percent mix
What is the normal layout for a helitack operation?
What pressure is delivered to the kamlock?
What is the GPM at the kamlock
3” to wye to 3” to kamlock and 1 3/4 protection line
15 PSI NP
340 GPM
What is the friction loss per hundred feet of 3 inch in helitack operation
10 PSI per hundred feet
How many gallons in one cubic foot of water
7.5 gallons
How much does a cubic foot of water weigh
62.48 pounds
How do we roundoff numbers for calculations
Round two places for calculations round one place for the answer