Pond Construction and Design - Quiz

Quiz Question

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 _____________.?
		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?