If the permissible stress in steel in tension is 140 N/mm2, then the depth of neutral axis for a singly reinforced rectangular balanced section will be___________________?

Related Mcqs:

1. If the depth of neutral axis for a singly reinforced rectangular section is represented by kd in working stress design, then the value of k for balanced section_______________?

   A. depends on as, only
   B. depends on aCbC only
   C. depends on both crst and acbc
   D. is independant of both ast and acbc where d is the effective depth, ast is per-missible stress in steel in tension and ocbc is permissible stress in concrete in bend¬ing compression

2. If the depth of actual neutral axis in a beam is more than the depth of critical neutral axis, then the beam is called________________?

   A. balanced beam
   B. under-reinforced beam
   C. over-reinforced beam
   D. none of the above

3. According to ISI recommendations, the maximum depth of stress block for balanced section of a beam of effective depth d is__________________?

   A. 0.43 d
   B. 0.55 d
   C. 0.68 d
   D. 0.85 d

4. According to Whitney’s theory, depth of stress block for a balanced section of a concrete beam is limited to_______________?

   A. 0.43 d
   B. 0.537 d
   C. 0.68 d
   D. 0.85 d

   where d is effective depth of beam[ES 2k]

5. The permissible diagonal tensile stress in reinforced brick work is_____________?

   A. about 0.1 N/mm2
   B. zero
   C. 0.3 N/mm2 to 0.7 N/mm2
   D. about 1.0 N/mm2

6. The average permissible stress in bond for plain bars in tension is_______________?

   A. increased by 10% for bars in compression
   B. increased by 25% for bars in compression
   C. decreased by 10% for bars in compression
   D. decreased by 25% for bars in compression

7. In working stress design, permissible bond stress in the case of deformed bars is more than that in plain bars by_______________?

   A. 10%
   B. 20%
   C. 30%
   D. 40%

8. As per Whitney’s theory, the maximum moment of resistance of the balanced section of a beam of width b and effective depth d is given by_______________?

   A. ^acybd2
   B. ^acybd2
   C. 0.185acybd2
   D. 0.43acybd2
   where acy is the cylinder compressive strength of concrete

9. For a reinforced concrete section, the shape of shear stress diagram is_______________?

   A. wholly parabolic
   B. wholly rectangular
   C. parabolic above neutral axis and rectangular below neutral axis
   D. rectangular above neutral axis and parabolic below neutral axis

10. Ratio of permissible stress in direct compression and bending compression is______________?

    A. less than 1
    B. between 1 and 1.5
    C. between 1.5 and 2.0
    D. greater than 2