True/False
True/False Pt. 2
Short Answer
Short Answer Pt. 2
Miscellaneous
100
Manning's Equation is valid for fully laminant flow
False
100
The difference in head loss from the Energy Grade Line due to velocity is the Hydraulic Grade Line
True - HGL = EGL - v^2/2g
100
How do we classify whether flow is critical or not?
Froude Number classifies the flow as either critical, subcritical, supercritical.
100
The depth when the energy of the flow is at its minimum is called the...
Critical Depth
100
You can mix units for Hazen-Williams/Manning's general equation
False
200
Losses due to inlets, outlets, and expansion are considered major
False - They are minor losses. Major losses are due to friction in the pipe.
200
You can use the design curve process for all forms of open channels
False - triangular channels are excluded
200
What is the flow classified as if the Froude number is 3.5?
It is classified as supercritical
200
The area divided by the top width of a channel is the variable...
D - hydraulic depth
200
You have to divide the actual length by a 1000 when using Hazen-Williams equation
True
300
K is the loss coefficient
True
300
P is the perimeter of the pipe or channel
False - P is the wet perimeter of the pipe or channel
300
If the Froude Number is found to be 1, the flow is...
Critical
300
The headloss through a hydraulic jump could be approximated as...
the change in energy between the upstream and downstream sections of the hydraulic jump
300
The Z2 in the energy equation is the elevation of which grade line?
It is the elevation of the Energy Grade line.
400
The water elevation in the second tank is also known as the Energy Grade Line
False - Water elevation is the Hydraulic Grade Line
400
Hazen-Williams is most accurate for all types of flow
False - Manning's is more accurate for open channel flow
400
The D is the same as _________ in a rectangular cross section in determining Froude's number
Normal Depth
400
What is the distance between supercritical and subcritical flow?
The length of the hydraulic jump/drop
400
How would you determine the water elevation level from the energy equation?
Subtract v^2/2g from Z2 (Elevation of the Energy Grade Line)
500
The sum of the flow in parallel pipes are equal to the entrance flow or exit flow
True - Q1 = Q2+Q3 = Q4
500
Darcy is empirical and Hazen-Williams is theretical
False - Darcy is theoretical and Hazen-Williams is empirical
500
If a flow starts as subcritical and changes to supercritical, it is called a....
Hydraulic Drop
500
Draw and label the energy and depth diagram for hydraulic jump/drops
see board
500
What is specific energy?
Relationship between the total head above the channel, bottom, and depth of the flow
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