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Irrigation Engineering Practice Test: Gravity Dam Design and Construction
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Gravity Dam Design and Construction topics include: Gravity dam cross section and stability, gravity method, gravity daams design and galleries construction. Gravity dams are solid concrete or stone masonry structures that use their weight and resistance against the foundation to hold back water. They are built across rivers to create reservoirs.  Here are some design and construction considerations for gravity dams: Foundation: The foundation should be strong enough to support the dam's weight. The Bureau of Indian Standards recommends designing gravity dams for the most adverse load... Show more
Irrigation Engineering Practice Test: Gravity Dam Design and Construction
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25 Questions

1. Calculate the top width of the dam if the height of water stored is 84m.
2. What is the value of horizontal destabilizing force caused by the formation of waves in a storage reservoir having a fetch of 52 km due to high wind of 172 km/h?
3. Which failure occurs when the net horizontal force above any plane in the dam or at the base of the dam exceeds the frictional resistance developed at that level?
4. The horizontal joints that extends through the entire width of the dam section and are developed at each lift height is called as ___________________
5. The foundation pressure used in the pressure grouting is equal to _________________
6. Transverse joints in concrete gravity dams are the ___________________________
7. The general value of lift for concrete is taken as __________________
8. For triangular dam section of height H for just no tension under the action of water pressure, self-weight and uplift pressure, the minimum base width required is _____________
9. The vertical stress at the toe was found to be 3.44 MPa at the base of the gravity dam section. If the downstream face of the dam has a slope of 0.617 horizontal: 1 vertical, the maximum principal stress at the toe of the dam when there is no tailwater is _______________
10. Which of the following criteria has to be satisfied for no tension at any point on a gravity dam?
11. The two-dimensional stability analysis of gravity dams proves better for U-shaped valleys than for V-shaped valleys.
12. What is the value of eccentricity for no tension condition in the dam?
13. A concrete gravity dam having a maximum reservoir level at 200 m and the RL of the bottom of the dam 100 m. The maximum allowable compressive stress in concrete is 3000 KN/m2 and the specific gravity of concrete is 2.4. Calculate the height of the dam and check whether it is a high dam or low dam.
14. If the eccentricity of the resultant falls outside the middle third, the ultimate failure of the dam occurs by ______________
15. What is the maximum permissible tensile stress for high concrete gravity dam under worst conditions?
16. A low gravity dam of elementary profile made up of concrete of relative density 2.57 and safe allowable stress of foundation material 4.2 MPa. What is the maximum height of the dam without considering the uplift force?
17. When the reservoir is empty, the maximum vertical stress equal to ________________
18. A gravity dam is subjected to hydrodynamic pressure caused by __________
19. Presence of tail-water in a gravity dam ____________________
20. For full reservoir condition in a gravity dam, the critical combination of vertical and horizontal earthquake accelerations to be considered for checking the stability is ________________________
21. When the reservoir is empty, the single force acting on it is the self-weight of the dam which acts at a distance of ____________
22. In a concrete gravity dam with a vertical upstream face the stabilising force is provided by the ___________________
23. For usual values of permissible compressive stress and specific gravity of concrete, a high concrete gravity is the one whose height exceeds ______________
24. The upward acceleration of dam due to seismic activity will ________________________
25. The horizontal component of an earthquake wave producing instability in a dam is the one which acts __________________

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