Seepage through embankments in an earthen dam is controlled by_______________?

Related Mcqs:

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

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

2. 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

3. 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

4. As compared to gravity dams, earthen dams__________________?

   A. are costlier
   B. are less susceptible to failure
   C. require sound rock foundations
   D. require less skilled labour

5. 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)

6. The unit hydrograph due to a storm may be obtained by dividing the ordinates of the direct runoff hydrograph by_______________?

   A. direct runoff volume
   B. period of storm
   C. total rainfall
   D. none of the above

7. River training for depth is achieved by_______________?

   A. groynes
   B. construction of dykes or leavees
   C. both (A) and (B)
   D. groynes and bandalling

8. If d is the depth of the aquifer through which water is flowing, then the relationship between permeability k and transmissible T is given by_______________?

   A. T = kd
   B. T = k/d
   C. T= Vkd
   D. k= VTd

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

   A. hydrostatic pressure at toe
   B. average of hydrostatic pressure at toe and heel
   C. two-third of hydrostatic pressure at toe plus one-third of hydrostatic pressure at heel
   D. none of the above

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)