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_______________?

Related Mcqs:

1. 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

2. 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

3. 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

4. The stage of river carrying a discharge of Q m7sec at a point is 10 m and slope of water surface is (1/4000). The discharge of a flood at the same point and same stage of 10 m with a water surface slope of(l/1000) will be________________?

   A. V2 Q m3/sec
   B. 0.5 Q mVsec
   C. 2 Q m3/sec
   D. 4 Q m3/sec

5. When the reservoir is full, the maximum compressive force in a gravity dam is produced______________?

   A. at the toe
   B. at the heel
   C. within the middle third of base
   D. at centre of base

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

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

7. 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)

8. The normal annual precipitation at stations X, A, B and C are 700 mm, 1000 mm, 900 mm and 800 mm respectively. If the storm precipitation at three station A, B and C were 100 mm, 90 mm and 80 mm respectively, then the storm precipitation for station X will be___________________?

   A. 70mm
   B. 80mm
   C. 90 mm
   D. 105 mm

9. Presence of tail water in a gravity dam_____________?

   1) increases the principal stress
   2) decreases the principal stress
   3) increases the shear stress
   4) decreases the shear stress
   The correct answer is

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

10. 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)