y Hydraulics Theory and Practical Applications Flashcards
One cubic foot contains how many gallons?
7.5 gallons
One cubic foot of fresh water weighs?
62.5 pounds
One gallon contains how many cubic inches?
231 inches
One gallon of fresh water weighs
8.33 pounds
A column of water 1’ high exerts a pressure of
0.434 psi at its base
A column of water 2.304’ high exerts a pressure of
1 psi at its base.
50’ length of 1.75” hose contains how much gallons of water?
6.24 gallons of water
50’ length of 2.5” hose contains how many gallons?
12.74 gallons
50’ length of 3” hose contains how many gallons?
18.35 gallons
100’ length of 4” hose contains how many gallons?
65.25 gallons
NP for hand lines with smooth bore nozzles is
50 psi
Nozzle pressure for master streams with smooth bore nozzles is
80 psi
Akron Assault nozzles are designed for ______ nozzle pressure and flows ______ gpm with fog nozzle
50 PSI
175gpm
Akron Assault nozzles flows how many gpms with 15/16 slug?
185 gpm
The nozzle pressure for all other fog nozzles is ______ unless otherwise indicated?
100 psi
In order to determine the amount or weight of water contained in a vessel or container, we must
first determine what?
the volume of the given container
The formula for determining volume for a rectangular or square shaped container is:
Capacity in gallons = L’ x W’ x D’ x 7.5
7.5 is number of gallons in a cubic foot of water
Example 1: How many gallons of water are in a swimming pool that is 40’ long, 20’
wide, and 10’ deep?
Capacity = 40’ x 20’ x 10’ x 7.5 gallons/cubic ft.
= 8000 cubic/ft. x 7.5 gallons/cubic ft.
= 60,000 gallons
How many gallons of water are in a swimming pool that is 40’ long by 20’
wide, 3’ deep in the shallow end and 9’ deep in the deep end?
Capacity = L’ x W’ x average depth’ x 7.5 gallons/cubic ft.
= 40’ x 20’ x ([3’ + 9’] / 2) x 7.5 gallons/cubic ft.
= 40’ x 20’ x 6’ x 7.5 gallons/cubic ft.
= 4800 cubic ft. x 7.5 gallons/cubic ft.
= 36,000 gallons
This type of pump takes
advantage of incoming pressure?
Centrifugal pumps
What is the amount of water contained in a cylinder 40’long and 8’ in
diameter?
Determining the flow from a smooth bore nozzle can be computed by using which formula?
Theoretical Calculations and Fire Ground Calculations
Hand Line @ 50psi
1/2”
Theoretical Calculations and Fire Ground Calculations
Hand Line @ 50psi
15/16”
