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Pond Construction and Design


Quiz Questions

1.Soils are classified in four hydrologic groups according to infiltration and transmission rates. __________ soils have a high infiltration rate. They are chiefly deep, well-drained sand or gravel. The runoff potential is low.
A
B
C
D
2. A _____________ storm frequency may be adequate for sizing the spillway in small ponds.
5-year
10-year
20-year
25-year
3.Good foundation materials, those that provide both stability and imperviousness, are a mixture of coarse and fine-textured soils. Which of the following is a good example of such soil?
Gravel-sand-clay mixtures
gravel-sand-silt mixtures
Sand-clay mixtures
All the above
4.The following figure represents typical control section of a _____________.?
PDH Course - Pond Construction and Design 1
Natural spillway with vegetation
Excavated auxiliary spillway with vegetation
5.Pipe made of __________________ is suitable for pipe spillways.
Cast iron
Smooth steel
Concrete
All the above
6._____________ is the vertical distance between the elevation of the water surface in the pond when the spillway is discharging at designed depth and the elevation of the top of the dam after all settlement.
Cut-off
Settlement allowance
Freeboard
None of the above
7.____________ is a reservoir constructed mainly by excavation in flat terrain. A relatively short embankment section on the downstream watercourse side may be necessary for desired storage amount.
Dam
Excavated pond
Drop inlet
Drain
8.Chemical treatment is not effective in coarse-grained soils to prevent excessive seepage.
True
False
9.Bentonite is a fine-textured colloidal clay. When wet it absorbs several times its own weight of water and, at complete saturation, swells as much as __________ its original volume.
8 to 20 times
16 to 30 times
18 to 25 times
25 to 55 times
10.Which of the following figure shows correct disposal of waste material?
PDH Course - Pond Construction and Design 2
PDH Course - Pond Construction and Design 3