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

Related Mcqs:

1. 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

2. The percentage of reinforcement in case of slabs, when high strength deformed bars are used is not less than________________?

   A. 0.15
   B. 0.12
   C. 0.30
   D. 1.00

3. If nominal shear stress tv exceeds the design shear strength of concrete xc, the nominal shear reinforcement as per IS : 456-1978 shall be provided for carrying a shear stress equal to__________________?

   A. xv
   B. xc
   C. xv – TC
   D. Tv + Tc

4. 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

5. 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___________________?

   A. 0.35 d
   B. 0.40 d
   C. 0.45 d
   D. dependent on grade of concrete also

6. 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

7. 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

8. When shear stress exceeds the permissible limit in a slab, then it is reduced by____________?

   A. increasing the depth
   B. providing shear reinforcement
   C. using high strength steel
   D. using thinner bars but more in number

9. The design yield stress of steel according to IS: 456-1978 is_______________?

   A. 0.37 fy
   B. 0.57 fy
   C. 0.67 fy
   D. 0.87 fy

   where fy is the characteristic yield strength of steel

10. If a beam fails in bond, then its bond strength can be increased most economi-cally by___________?

    A. increasing the depth of beam
    B. using thinner bars but more in number
    C. using thicker bars but less in number
    D. providing vertical stirrups