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Irrigation Engineering Practice Test: Earthen and Rock Fill Dams
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Earthen and Rock Fill Dams topics include: Earthen dams types, earth dams design criteria and failures, earthen slopes stability, seepage control through embankments and foundations. Earth and rockfill dams are built by compacting layers of earth or rock: Earthen dams: Also called embankment dams, these dams are made from compacted earth. They can be made from one type of material, or from different zones of material. Earthen dams can range in size from small structures used for irrigation or water storage to large dams used for hydroelectric power generation and flood control. Rock-fill... Show more
Irrigation Engineering Practice Test: Earthen and Rock Fill Dams
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25 Questions

1. Which of the following zone in Zoned type embankment prevents piping through cracks?
2. Which of the following earth dam is suitable only on impervious foundation?
3. What is the Terzaghi’s recommended value of U/s side slope for earth dam of height less than 15m of homogenous silty clay?
4. Calculate the top width (A) of the earth dam of height 50 m.
5. Which of the following line acts as a dividing line between dry (or moist) and submerged line?
6. Calculate the factor of safety at the point of maximum shear if unit shearing resistance is 97.9 kN/m2 and the maximum shear-stress induced is 55.72 kN/m2. Check whether the dam is safe or unsafe.
7. Which of the following statement is correct with reference to earthen dams?
8. The upstream face of the earth dam is considered as _____________________
9. In order to prevent the possibility of the cross-flow towards the earthen embankments, it is necessary to provide _____________________
10. The base width of a rock-fill dam in comparison to that of an earthen dam is _______________
11. The blanket in earth dam is provided ___________________
12. The only provision among the following which can help control the seepage through the body of an earthen dam and thus to keep the phreatic line well within the dam width is _________________
13. Which embankment has the thickness of the diaphragm at an elevation less than 10 meters or the height of the embankment above the corresponding elevation?
14. During the maintenance of an earthen dam, the apparent seepage through the foundation of the dam is best taken care of by providing ______________________
15. Which of the following soil material is most preferred for the central core material of zoned embankment type dam?
16. Which of the following method is also called as the Slices method?
17. Provision of horizontal berms at suitable vertical intervals may be provided in the downstream face of an earthen dam in order to _________________
18. The central core of the zoned embankment type earth dam ________________________
19. During the construction of an earthen dam by hydraulic fill method, development of pore pressure becomes important in the __________________
20. Which type of dam is suitable on shallow pervious foundations?
21. What is the correct expression of equivalent liquid unit weight?
22. Which of the following is not provided in order to control the possibility of sand boiling?
23. The collection and removal of water before it acquires high downward velocities is ensured by provision of ____________________
24. On moderate foundations and particularly in seismic areas, the type of dam which can preferably be considered for construction is ___________________
25. ____________________ is provided when large scale stratification occurs.

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