The uplift pressure on the face of a drainage gallery in a dam is taken as_________________?

Related Mcqs:

1. The uplift pressure on a dam can be controlled by_________________?

   1) constructing cutoff under upstream face
   2) constructing drainage channels bet-ween the dam and its foundation
   3) by pressure grouting in foundation
   The corret answer is?
   A. only (1)
   B. both (1) and (2)
   C. both (1) and (3)
   D. (1), (2) and (3)

2. If the R.L’s of canal bed level and high flood level of drainage are 212.0 m and 210.0 m respectively, then cross drainage work will be________________?

   A. aqueduct
   B. superpassage
   C. syphon
   D. syphon aqueduct

3. The drainage water intercepting the canal can be disposed of by passing the canal below the drainage in___________________?

   A. aqueduct and syphon aqueduct
   B. aqueduct and super passage
   C. super passage and canal syphon
   D. level crossing

4. When the upstream face of a gravity dam is vertical, then the intensity of water pressure at the water surface and at the base respectively will be_______________?

   A. 0 and wH212
   B. wH2/2and wH2/3
   C. wH and 0
   D. OandwII

   where w is unit weight of water and H is the depth of water

5. For the upstream face of an earthen dam, the most adverse condition for stability of slope is_______________?

   A. sudden drawdown
   B. steady seepage
   C. during construction
   D. sloughing of slope

6. Seepage through foundation in an earthen dam is controlled by providing___________________?

   A. rock toe
   B. horizontal blanket
   C. impervious cut off
   D. chimney drain

7. Which of the following spillways is least suitable for an earthen dam ?

   A. ogee spillway
   B. chute spillway
   C. side channel spillway
   D. shaft spillway

8. The maximum permissible eccentricity for no tension at the base of a gravity dam is__________________?

   A. B/2
   B. B/3
   C. B/4
   D. B/6

9. The major resisting force in a gravity dam is___________________?

   A. water pressure
   B. wave pressure
   C. self-weight of dam
   D. uplift pressure

10. The forces, which are considered for the analysis of an elementary profile of a gravity dam under empty reservoir condition, are________________?

    1) Water pressure
    2) Self weight
    3) Uplift
    4) Pressure due to earthquake
    The correct answer is

    A. Only (2)
    B. (1), (2) and (3)
    C. (1), (2) and (4)
    D. (1), (2), (3) and (4)