Q. The two-dimensional stability analysis of gravity dams proves better for U-shaped valleys than for V-shaped valleys.

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Q. Calculate the value of minimum base width for an elementary triangular concrete gravity dam supporting 72 m height of reservoir water and full uplift? (Take specific gravity of concrete as 2.4 and coefficient of friction as 0.7)

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Q. For usual values of permissible compressive stress and specific gravity of concrete, a high concrete gravity is the one whose height exceeds ______________

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Q. 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 _____________

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Q. If the eccentricity of the resultant falls outside the middle third, the ultimate failure of the dam occurs by ______________

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Q. What is the value of eccentricity for no tension condition in the dam?

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Q. Calculate the top width of the dam if the height of water stored is 84m.

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Q. In high dams, the safety against sliding should be checked only for friction.

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Q. 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 ________________________

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Q. 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?

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Q. 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?

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Q. 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 _______________

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Q. What is the recommended value of shear friction factor against sliding?

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Q. 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_____________________

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Q. 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.

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Q. The axis of a gravity dam is the ______________________

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Q. Presence of tail-water in a gravity dam ____________________

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Q. The provision of drainage gallery in a gravity dam helps in reducing ____________________

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Q. 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

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Q. Transverse joints in concrete gravity dams are the ___________________________

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