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

Related Mcqs:

1. 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

2. Minimum grade of concrete to be used in reinforced concrete as per IS:456-1978 is_____________?

   A. M15
   B. M20
   C. M 10
   D. M25

3. In order to obtain the best workability of concrete, the preferred shape of aggregate is_______________?

   A. rounded
   B. elongated
   C. angular
   D. all of the above

4. 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

5. 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

6. For concreting of heavily reinforced sections without vibration, the workability of concrete expressed as compacting factor should be________________?

   A. 0.75-0.80
   B. 0.80-0.85
   C. 0.85 – 0.92
   D. above 0.92

7. In reinforced concrete footing on soil, the minimum thickness at edge should not be less than______________?

   A. 100 mm
   B. 150 mm
   C. 200 mm
   D. 250 mm

8. In symmetrically reinforced sections, shrinkage stresses in concrete and steel are respectively_______________?

   A. compressive and tensile
   B. tensile and compressive
   C. both compressive
   D. both tensile

9. 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]

10. 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