Hydraulics Flashcards
1 cubic foot contains
in inches
gallons
weight
1728 cubic inches
- 5 gallons
- 5 pounds
A column of water 1’ high exerts
0.434 psi
1.88 hose 50’ long has how many gallons
7.2 gallons of water
100ft 4’’ house contains how many gallons
65.25 gallons
For 1 psi how high does the column of water have to be
2.304’
smooth bore hand line np
50 psi
all other fog nozzles besides Akron assault
100psi Akron 50 psi
Smooth bore master streams np
80 psi but can be increased to 100 for higher flow
Formula for rectangular containers
LxWxDx7.5 if two depths add depts. together and divide by two LxWx(3+9/2)7.5
cylindrical containers
3.14x R squared xHx7.5
Smooth bore nozzle discharge formula
GPM=29.7xDsquared x square root NP
Decon shower
270gpm at75psi
piercing nozzle
125gmp at 100psi
Smooth bore break away nozzle tip, size, gpm, psi
1 3/8 500gpm 110psi
1 1/2 600gpm 110psi
1 3/4 800gpm 110psi
2 1000gpm 120psi
task force tip
500gpm 90psi
750gpm 110psi
1000gpm 120psi
1250 140psi
Mercury monitor
80psi smooth bore
100psi fog nozzle
max inlet pressure 150psi
app loss 10psi
Coefficients
1" 150 1 3/4" 10 ( IFSTA 15.5) 2" 8 2 1/2" 2 3" 0.8 3 1/2 .34 4" .2 5" .08
Friction loss formula
FL=CQsquaredL
App loss
less then 350=0 Greater than 350=10 Ladder pipes=25 master streams (except mercury monitor)=25 standpipes=25
Basic pump operators formula
PDP=FL+AL+TPL
TPL formula
TPL=FL+AL+/-EL
JS10 nozzle
100gpm at 100psi
Educators
95-125gpm at 200psi at educator
Eductor must be 50’ from pumper and within 200 of nozzle nor more then 5’ above educator
Nozzle for cafs engine
15/16 best results
Max time you can flow without over heating a cafs engine
2 hours
supply lines charges to ___ initially
4” 50psi
3” 100psi
4”&3” 100psi
Max flow for Fairfax county engines
1500gpm at 150psi static source
1050gpm at 200psi (75% drop)
750gpm at 250psi(50% drop)
Coefficient for multiple supply lines
two 3”=.2
4”&3”=.09
two 4”=.05
Like volumes
(SP-RP)100/SP 0-10% 3x 11-15% 2x 16-25% 1x 26+ 0x
