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__________________?

Related Mcqs:

1. 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...

2. If Sb, is the average bond stress on a bar of diameter subjected to maximum stress , the length of the embedment is given by_____________?

   A. l = dt/Sb B. l = dt/2Sb C. l = dt/3Sb D. l = dt/4Sb...

3. The length of the lap in a compression member is kept greater than bar diameter x (Permissible stress in bar / Five times the bond stress) or____________________?

   A. 12 bar diameters B. 18 bar diameters C. 24 bar diameters D. 30 bar diameters...

4. For M 150 mix concrete, according to I.S. specifications, local bond stress, is_________________?

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

5. The reinforced concrete beam which has width 25 cm, lever arm 40 cm, shear force 6t/cm2, safe shear stress 5 kg/cm2 and B.M. 24 mt________________?

   A. Is safe in shear B. Is unsafe in shear C. Is over safe in shear D. Needs redesigning...

6. If W is total load per unit area on a panel, D is the diameter of the column head, L is the span in two directions, then the sum of the maximum positive bending moment and average of the negative bending moment for the design of the span of a square flat slab, should not be less than________________?

   A. WL/12 (L – 2D/3)² B. WL/10 (L + 2D/3)² C. WL/10 (L – 2D/3)² D. WL/12 (L – D/3)²...

7. The length of lap in tension reinforcement should not be less than the bar diameter × (actual tension / four times the permissible average bond stress) if it is more than_______________?

   A. 18 bar diameters B. 24 bar diameters C. 30 bar diameters D. 36 bar diameters...

8. A short column 20 cm × 20 cm in section is reinforced with 4 bars whose area of cross section is 20 sq. cm. If permissible compressive stresses in concrete and steel are 40 kg/cm2 and 300 kg/cm2, the Safe load on the column, should not exceed_______________?

   A. 4120 kg B. 41,200 kg C. 412,000 kg D. None of these...

9. If permissible working stresses in steel and concrete are respectively 1400 kg/cm2 and 80 kg/cm2 and modular ratio is 18, in a beam reinforced in tension side and of width 30 cm and having effective depth 46 cm, the lever arms of the section, is______________?

   A. 37 cm B. 38 cm C. 39 cm D. 40 cm...

10. For M 150 grade concrete (1:2:4) the moment of resistance factor is_________________?

    A. 0.87 B. 8.50 C. 7.50 D. 5.80...