Consider the following statements in respect of dams:1. In a gravity dam, a grout curtain is provided near the toe to reduce the exit gradient.2. A drainage gallery with its drainage pipe system provided in a gravity dam reduces the uplift pressure at all levels below the upstream water level.3. An earthquake acceleration of 0.1 g acting vertically downward causes a decrease of 10% in the limit weight of concrete and of water in a gravity dam.4. The Tehri dam is a gravity dam.Which of the above statements are correct?

Consider the following statements in respect of dams:1. In a gravity d

1.	Consider the following statements in respect of dams:1. In a gravity dam, a grout curtain is provided near the toe to reduce the exit gradient.2. A drainage gallery with its drainage pipe system provided in a gravity dam reduces the uplift pressure at all levels below the upstream water level.3. An earthquake acceleration of 0.1 g acting vertically downward causes a decrease of 10% in the limit weight of concrete and of water in a gravity dam.4. The Tehri dam is a gravity dam.Which of the above statements are correct?
A.	1 and 3 only
B.	1 and 4 only
C.	2 and 3 only
D.	2 and 4 only
Answer» B. 1 and 4 only

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