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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 value of free-board that should be provided for a reservoir having a wind velocity of 92 km/h and it extends up to 18 km upstream.
2. The foundation pressure used in the pressure grouting is equal to _________________
3. In high dams, the safety against sliding should be checked only for friction.
4. Leakage through the transverse joints in a gravity dam is prevented by ____________
5. The base width of a solid gravity dam is 35 m and the specific gravity of dam material is 2.45. What is the approximate allowable height of the dam having an elementary profile without considering the uplift?
6. The provision of drainage gallery in a gravity dam helps in reducing ____________________
7. 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?
8. The two-dimensional stability analysis of gravity dams proves better for U-shaped valleys than for V-shaped valleys.
9. If the uplift increases and the net effective downward force reduces, the resultant will shift towards the toe.
10. 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?
11. Transverse joints in concrete gravity dams are the ___________________________
12. A gravity dam is subjected to hydrodynamic pressure caused by __________
13. Which of the following attempts are made to reduce the uplift in order to economize on the provided section of a concrete gravity dam?
i. Providing drainage gallery to collect seepage water
ii. Constructing cut-off under upstream face
iii. Pressure grouting in dam foundation
iv. Provision of shear keys or keyways
14. The horizontal joints that extends through the entire width of the dam section and are developed at each lift height is called as ___________________
15. What is Von Karman’s formula for hydrodynamic force (Pe)?
16. The small openings made in the huge body of a concrete gravity dam such as sluices and inspection galleries can be assumed to be causing only local effects without any appreciable effect on the distribution of stresses as per the principle of_____________________
17. The factor of safety against overturning generally varies between ___________
18. Presence of tail-water in a gravity dam ____________________
19. The axis of a gravity dam is the ______________________
20. The governing compressive stress in a concrete gravity dam which should not be allowed to exceed the permissible value of about 3000 KN/m2 while analyzing full reservoir case is ____________________
21. What is the recommended value of shear friction factor against sliding?
22. The vertical component of the earthquake wave which produces adverse effects on the stability of a dam when is acting in ____________________
23. What is the formula for limiting height of a gravity dam?
24. The horizontal component of an earthquake wave producing instability in a dam is the one which acts __________________
25. The general value of lift for concrete is taken as __________________