Definition
2 x 2 = 4 sf
4 x V = 12 cfs
V = 3 ft/s
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The water in a tank is 37 feet high when full. You are in a valve vault making an
adjustment, and you read 11 psi on a gauge that is mounted 9 feet below the
floor elevation of the tank. How many feet are in the tank?
With the same flow in all sections of the line, the gradient becomes _____ as the
pipe becomes ____ because of the _____.
The pipe is 2' in diameter, and your flow order is 3.0 CFS. What's the velocity?
, A flume is 2 ft wide and 2 ft deep. It is flowing full of water and the quantity
is measured at 12 CFS.
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2 of 42
Term
A = ____ and is always represented in ____.
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flow
Hazen-Williams formula
cfs
area
80 x 0.433 = 34.6 PSI
square feet
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3 of 42
Definition
Hazen-Williams formula
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, If there was no flow in the line The C factor is a coefficient in
(static) the water head at the end of the ____ which has long been
the line would be ____. used for determining flow in
pipe.
The amount of fiction depends What is the psi a the bottom of a
partly on the ____. tank with 80 feet of head.?
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4 of 42
Term
Velocity (V)
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The speed at which water moves. It is usually measured in feet per second
(FT/S) in US and meters per second in metric (the rest of the world).
velocity
feet / second (ft/s)
The force on a unit area of water. Water flows in a water system when it is under a
force that makes it move. Typically measured in psi or feet of head.
As water flows through a pipeline, there is friction between the water and the
walls of the pipe. It is the resistance to flow of water in a pipe
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