If A is the area of the foundation of a retaining wall carrying a load W and retaining earth of weight w per unit volume, the minimum depth (h) of the foundation from the free surface of the earth, is )/(1 + sin )]_________________?

Related Mcqs:

1. per unit run exerted by the Total pressure on the vertical face of a retaining wall of height retained earth weighing per unit volume, is___________________?

   A. wh [(1 – )/(1 + sin )]
   B. wh² [(1 – )/(1 + sin )]
   C. wh² [(1 – )/2(1 + sin )]
   D. wh² [(1 – )/3(1 + sin )]

2. If p1 and P2 are effective lateral loadings at the bottom and top exerted by a level earth subjected to a super-load on the vertical face of height h of a retaining wall, the horizontal pressure p per unit length of the wall, is____________________?

   A. [( – )/2] h
   B. [( + )/4] h
   C. [( + )/2] h
   D. ( – h

3. To have pressure wholly compressive under the base of a retaining wall of width b, the resultant of the weight of the wall and the pressure exerted by the retained, earth should have eccentricity not more than________________?

   A. b/3
   B. b/4
   C. b/5
   D. b/6

4. If q is the punching shear resistance per unit area a, is the side of a square footing for a column of side b, carrying a weight W including the weight of the footing, the depth D. of the footing from punching shear consideration, is____________________?

   A. D = W (a – b)/4a²bq

   B. D = W (a² – b²)/4a²bq

   C. D = W (a² – b²)/8a²bq

   D. D = W (a² – b²)/4abq

5. The stem of a cantilever retaining wall which retains earth level with top is 6 m. If the angle of repose and weight of the soil per cubic metre are 30° and 2000 kg respectively, the effective width of the stem at the bottom, is_______________?

   A. 51.5
   B. 52.5
   C. 53.5
   D. 54.5

6. If is the overall height of a retaining wall retaining a surcharge, the width of the base slab usually provided, is________________?

   A. 0.3 H
   B. 0.4 H
   C. 0.5 H
   D. 0.7 H

7. A retaining wall and is the horizontal earth pressure, the factor of safety If is weight of against sliding, is_____________?

   A. 1.0
   B. 1.25
   C. 1.5
   D. 2.0

8. Total pressure on the vertical face of a retaining wall of height h acts parallel to free surface and from the base at a distance of_____________________?

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

9. In testing a pile by load test, pile platform is loaded with one and half times the design load and a maximum settlement is noted. The load is gradually removed and the consequent rebound is measured. For a safe pile, the net settlement (i.e. total settlement minus rebound) per tonne of test load should not exceed________________?

   A. 10 mm
   B. 15 mm
   C. 20 mm
   D. 25 mm

10. In a pre-stressed beam carrying an external load W with a bent tendon is having angle of -stressed load P. The net downward load at the centre is_________________?

    A. W – 2P
    B. W – P
    C. W – P
    D. W – 2P