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EXAM No. 154. HYDRAULIC DESIGN OF SPILLWAYS. 1. A ______ is sized to ...
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EXAM No. 154 1.
2.
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HYDRAULIC DESIGN OF SPILLWAYS
A ______ is sized to provide the required capacity at a specific reservoir elevation. A.
chute
B.
spillway
C.
dam
D.
None of the above.
Which of the following is a usual condition involved with hydraulic analysis of a spillway? A.
Subcritical flow in the spillway approach, initially at a low velocity, accelerating, however, as it approaches the crest.
B.
Critical flow as the water passes over the spillway crest.
C.
Supercritical flow in the chute below the crest.
D.
All of the above.
3. The ogee crest spillway is basically a sharp-crested weir with the space below the _____ nape filled with _____.
4.
5.
A.
lower, concrete
B.
upper, concrete
C.
lower, water
D.
upper, water
The basic principle used to analyze steady incompressible flow through a spillway is the ___________ expressed by the Bernoulli equation. A.
law of conservation of energy
B.
law of conservation of mass
C.
All of the above.
D.
None of the above.
The hydraulic grade line may be____ the free water surface. A.
above
B.
below
C.
at
D.
All of the above.
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6.
7.
8.
9.
10.
11.
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The hydraulic grade line is also referred to as the A.
spillway surface.
B.
free water surface
C.
mean pressure gradient
D.
All of the above.
The _______ resistance coefficient n, reported in numerous hydraulic publications, is founded on empiricism. A.
Bernoulli’s
B.
Manning’s
C.
Newton’s
D.
None of the Above.
No restrictions exist at the spillway entrance that would case A.
an engineer to be terminated.
B.
a fatal accident to a pedestrian.
C.
an abrupt disturbance of the water and velocity distribution.
D.
All of the above.
The critical point is defined as A.
the location where the turbulent boundary layer intersects the free surface flow.
B.
the location where the turbulent boundary layer thickness becomes equal to the actual flow depth.
C.
All of the above.
D.
None of the above.
Cavitation is defined as the formation of a ____ and _______ phase within a liquid resulting from excessively ___ localized pressures. A.
gas, water vapor, low
B.
gas, water, low
C.
gas, water, high
D.
gas, water vapor, high
The damage potential resulting from cavitation is dependent upon
SOUTHEAST TEXAS CONTINUING EDUCATION 4700 HIGHWAY 365, SUITE A PMB 141 PORT ARTHUR, TEXAS 77642
12.
13.
14.
15.
16.
17.
A.
the boundary shape,
B.
the damage resistance characteristics of the boundary
C.
the length of time cavitation occurs
D.
All of the above.
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The boundary ____, _____, _____ are related by the cavitation index, σ. A.
size, velocity, elevation
B.
shape, velocity, elevation
C.
shape, diameter, elevation
D.
size, weight, elevation
The basic purpose of a spillway is to convey large floods through a project without incurring unacceptable damage either upstream or downstream from the spillway. A.
True
B.
False
Engineering-economic investigations will usually show that a wide spillway with a low unit discharge is more economical than a narrow spillway with high unit discharge. A.
True
B.
False
The efficiency of a spillway is not dependent on the curvature of the crest immediately upstream of the crest axis. A.
True
B.
False
There are three general configurations for the spillway approach. A.
True
B.
False
Each of the general configurations for the spillway approach all have a same treatment at the abutments. A.
True
B.
False
SOUTHEAST TEXAS CONTINUING EDUCATION 4700 HIGHWAY 365, SUITE A PMB 141 PORT ARTHUR, TEXAS 77642
18.
19.
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The chute is the portion of the spillway which connects the crest curve to the terminal structure. A.
True
B.
False
The value of an uncontrolled fixed crest spillway in providing an extremely reliable operation and a very low cost maintenance facility is undeniable. A.
True
B.
False
20. The selection of the type and design details of the dissipater is largely dependent upon the pertinent characteristics of the site. A.
True
B.
False
SOUTHEAST TEXAS CONTINUING EDUCATION
409.721.6800
www.setxce.com
4700 HIGHWAY 365, SUITE A PMB 141
[email protected]
PORT ARTHUR, TEXAS 77642
EXAM No. 154
HYDRAULIC DESIGN OF SPILLWAYS
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HYDRAULIC DESIGN OF SPILLWAYS
EXAM No. 154
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