Closed channel hydraulics

Question 1

Darcy Weisbach: n = ____

Answer 1

DW n = 2

Question 2

Hazen Williams n = ____

Answer 2

HW n = 1.85

Question 3

Losses through a parallel pipe network will be:

Answer 3

Equal!!

Question 4

Pumps in parallel increase: ______

Answer 4

Pumps in Parallel increase Q

Question 5

Pumps in series increase: ______

Answer 5

Pumps in series increase Head

Question 6

1 PSI = _____ ft of H2O

Answer 6

1 PSI = 2.31 Ft

Question 7

1 MGD = ____ CFS

Answer 7

1 MGD = 1.55 CFS

Question 8

Piezometer records ________ head, gives __GL.

Answer 8

Pressure and elevation head, therefore gives HGL.
Inlet located at edge of pipe

Question 9

Pitot Tube records _______ head,
Giving ___GL.

Answer 9

Pressure, elevation and velocity head, therefore gives EGL.

• Inlet with tube inside of pipe in direction of flow

Question 10

Energy Grade Line (EGL) = ___ Head

Answer 10

Total Head (Pressure, elevation and Velocity)

Question 11

Hydraulic Grade Line (HGL) = __Head

Answer 11

Elevation and Pressure Heads

Question 12

Velocity head can be obtained from:

Answer 12

EGL - HGL = Velocity Head (ft)

Question 13

1 CFS = _____ gpm

Answer 13

1 CFS = 449 gpm