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Water Distribution - Class 5 Questions with 100%
Verified Answers UPDATED!!!
A 16" pipeline is flowing 2,500 gpm. What is the velocity in fps?
- ANSWER Q = 2,500 gpm
2,500/449 = 5.57 cfs = Q
16/12 = 1.33' = D
1.33 x 1.33 x 0.785 = 1.39 sf = A
1.39 x V = 5.57
V = 4.01 f/s
Hydraulics - ANSWER :The study of fluids in motion or under
pressure.
Pressure - ANSWER 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.
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Static Pressure - ANSWER It exists although the water does not
flow. It is at "rest".
Dynamic Pressure - ANSWER Moving Energy.
Hydrostatic Pressure - ANSWER Static potential energy
converted into moving energy. Example: If water in a column is
permitted to empty from the bottom of the column, the water
will begin to flow under the __________________ applied by
the height of the column.
What is the psi a the bottom of a tank with 80 feet of head.? -
ANSWER 80 x 0.433 = 34.6 PSI
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? - ANSWER 11 PSI x 2.31 = 25.41
25.41 - 9 = 16.41 feet
Water Distribution - Class 5 Questions with 100%
Verified Answers UPDATED!!!
A 16" pipeline is flowing 2,500 gpm. What is the velocity in fps?
- ANSWER Q = 2,500 gpm
2,500/449 = 5.57 cfs = Q
16/12 = 1.33' = D
1.33 x 1.33 x 0.785 = 1.39 sf = A
1.39 x V = 5.57
V = 4.01 f/s
Hydraulics - ANSWER :The study of fluids in motion or under
pressure.
Pressure - ANSWER 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.
, 2|Page
Static Pressure - ANSWER It exists although the water does not
flow. It is at "rest".
Dynamic Pressure - ANSWER Moving Energy.
Hydrostatic Pressure - ANSWER Static potential energy
converted into moving energy. Example: If water in a column is
permitted to empty from the bottom of the column, the water
will begin to flow under the __________________ applied by
the height of the column.
What is the psi a the bottom of a tank with 80 feet of head.? -
ANSWER 80 x 0.433 = 34.6 PSI
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? - ANSWER 11 PSI x 2.31 = 25.41
25.41 - 9 = 16.41 feet
