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_______________?

Related Mcqs:

1. If the permissible compressive and tensile stresses in a singly reinforced beam are 50 kg/cm2 and 1400 kg/cm2 respectively and the modular ratio is 18, the percentage area At of the steel required for an economic section, is__________________?

   A. 0.496 %

   B. 0.596 %

   C. 0.696 %

   D. 0.796 %

2. 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

3. 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

4. If Ac, Asc and A are areas of concrete, longitudinal steel and section of a R.C.C. column and m and c are the modular ratio and maximum stress in the configuration of concrete, the strength of column is______________?

   A. cAc + m cAsc
   B. c(A – Asc) + m cAsc
   C. c[A + (m – 1)ASC]
   D. All the above

5. The section of a reinforced beam where most distant concrete fibre in compression and tension in steel attains permissible stresses simultaneously, is called_________________?

   A. Balanced section
   B. Economic section
   C. Critical section
   D. All the above

6. 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

7. A simply supported beam 6 m long and of effective depth 50 cm, carries a uniformly distributed load 2400 kg/m including its self weight. If the lever arm factor is 0.85 and permissible tensile stress of steel is 1400 kg/cm2, the area of steel required, is___________________?

   A. 14 cm 2
   B. 15 cm2
   C. 16 cm2
   D. 17 cm2

8. The modular ratio m of a concrete whose permissible compressive stress is C, may be obtained from the equation.

   A. m = 700/3C
   B. m = 1400/3C
   C. m = 2800/3C
   D. m = 3500/3C

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. A singly reinforced beam has breadth b, effective depth d, depth of neutral axis n and critical neutral axis n1. If fc and ft are permissible compressive and tensile stresses, the moment to resistance of the beam, is____________________?

    A. bn (fc/2) (d – n/3)
    B. Atft (d – n/3)
    C. ½ n1 (1 – n1/3) cbd²
    D. All the above