According to I.S.: 456, 1978 the thickness of reinforced concrete footing on piles at its edges, is kept less than______________?

Related Mcqs:

1. According to I.S. 456, 1978 the thickness of reinforced concrete footing on piles at its edges, is kept less than______________?

   A. 20 cm
   B. 30 cm
   C. 40 cm
   D. 75 cm

2. 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

3. If the bearing capacity of soil is 10 tonnes/cm2 and the projection of plain concrete footing from walls, is a cm, the depth D of footing is_______________?

   A. D = 0.0775 a
   B. D = 0.775 a
   C. D = 0.775 a
   D. D = 0.775 a2

4. A reinforced concrete cantilever beam is 3.6 m long, 25 cm wide and has its lever arm 40 cm. It carries a load of 1200 kg at its free end and vertical stirrups can carry 1800 kg. Assuming concrete to carry one-third of the diagonal tension and ignoring the weight of the beam, the number of shear stirrups required, is___________________?

   A. 30
   B. 35
   C. 40
   D. 45

5. The stresses developed in concrete and steel in reinforced concrete beam 25 cm width and 70 cm effective depth, are 62.5 kg/cm2 and 250 kg/cm 2 respectively. If m = 15, the depth of its neutral axis is_______________?

   A. 20 cm
   B. 25 cm
   C. 30 cm
   D. 35 cm

6. The maximum shear stress (q) in concrete of a reinforced cement concrete beam is_____________?

   A. Shear force/(Lever arm × Width)
   B. Lever arm/(Shear force × Width)
   C. Width/(Lever arm × Shear force)
   D. (Shear force × Width)/Lever arm

7. As per I.S. 456 – 1978, the pH value of water shall be_______________?

   A. Less than 6
   B. Equal to 6
   C. Not less than 6
   D. Equal to 7

8. According to I.S. : 456 specifications, the safe diagonal tensile stress for M 150 grade concrete, is_____________?

   A. 5 kg/cm2
   B. 10 kg/cm 2
   C. 15 kg/cm2
   D. 20 kg/cm2

9. If the average bending stress is 6 kg/cm2 for M 150 grade concrete, the length of embedment of a bar of diameter d according to I.S. 456 specifications, is__________________?

   A. 28 d
   B. 38 d
   C. 48 d
   D. 58 d

10. If P kg/m2 is the upward pressure on the slab of a plain concrete footing whose projection on either side of the wall is a cm, the depth of foundation D is given by________________?

    A. D = 0.00775 aP
    B. D = 0.0775 aP
    C. D = 0.07775 aP
    D. D = 0.775 Pa