Engineers Test Flashcards
2 1/2” Smoothbore Tip Sizes
1” = 1.000 | 1 1/8” = 1.125 | 1 1/4” = 1.250
Master Stream Stacked Tip Sizes
1 3/8” = 1.375 | 1 1/2 = 1.500 | 1 3/4” = 1.750 | 2” = 2.000
2 1/2” Smoothbore GPMs
1” = 210gpm | 1 1/8” = 267gpm | 1 1/4” = 330gpm
Master Stream Stacked Tip GPMs
1 3/8” = 505gpm | 1 1/2” = 600gpm | 1 3/4” = 800gpm | 2” = 1000gpm
1” Hose Coefficient
150
1 1/2” Coefficient
24
1 3/4” Hose Coefficient
15.5
2 1/2” Hose Coefficient
2
3” Hose Coefficient
0.8
5” Hose Coefficient
0.08
Nozzle Pressures
Fog Nozzle = 150 psi
Solid Stream = 50 psi
Master Stream = 80 psi
Friction Loss Calculations
FL = C x Q(squared) x L
100. 100
Friction Loss = Coefficient x Quantity (squared) x Length
Elevation Pressure Calulations Formula
0.5H = EP
5 psi x (Number of stories -1)
PDP (Pump Discharge Pressure) Formula
PDP = NP + TPL
PDP = Nozzle Pressure + Total Pressure Loss
Pressures
Atmospheric Head Static Normal Operating Residual Flow
PSI for FDCs
150psi
Hose Testing
5” 300’ @ 200 psi for 5 mins
all other hose 300’ @ 250 psi for 5 mins
Hose length and pressure for foam
1 3/4” hose @ 300’ max
eductor operated @ 200 psi
Weight Limits for Platforms
1000 # w/o waterflow
500 # w/ waterflow
Means of moving water in Distribution systems
Direct pumping
Gravity System
Combintation System
Appliance Friction Loss
0 psi when flowing less than 350 gpm
10 psi when over 350 gpm
25 psi for all master stream devices regardless of flow
Static Pressure
Pump is connected to a hydrant and IS NOT discharging water
Residual Pressure
Pump is connected to a hydrant and IS discharging water
Atmospheric Pressure
Pressure exerted by the atmosphere at the surface due to the weight of air
Head Pressure
Water pressure due to elevation (0.434 x height in feet)
Flow Pressure
Pressure created by the rate of flow or velocity of water coming from a discharge opening
SOP - At no time shall PDP exceed ______ PSI when pumping LDH
175 psi
What are the two general types of sprinkler coverage?
Complete & Partial
What are the major applications of sprinkler systems?
Wet Dry Preaction Deluge Residential
What are the different types of indicator valves?
Outside Stem & Yoke (OS+Y)
Post Indicator Valve (PIV)
Wall Post Indicator Valve (WPIV)
Post Indicator Valve Assembly (PIVA)
Sprinkler Head Types
Pendant
Upright
Sidewall
Special Purpose
How many lines can you add for Intake drop of 10% or less
5 lines of same size
How many lines can you add for intake drop of 10% - 20%
4 lines of same size
How many lines can you add for intake drop of 20% - 30%
3 lines of same size
How many lines can you add for intake drop of 30% - 40%
2 lines of same size
How many lines can you add for intake drop of 50% or more
1 line of same size
What are the GPM Ratings of our trucks
All Engines except E3 - 1500 GPM
E3 - 2000GPM
P1 - 1750GPM
P2 - 2000GPM
How is the GPM of the truck determined
based on gpms flowed from static draft