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

Related Mcqs:

1. 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

2. A continuous beam is deemed to be a deep beam when the ratio of effective span to overall depth (1/D. is less than__________________?

   A. 1.5
   B. 2.0
   C. 2.5
   D. 3.0

3. The relation between modulus of rupture fcr, splitting strength fcs and direct tensile strength fcl is given by_______________?

   A. tcr – rcs = tct
   B. fcr>fcs>fc
   C. fcr<fcs
   D. fc5>fcr>fC

4. The strength of concrete after one year as compared to 28 days strength is about_______________?

   A. 10 to 15% more
   B. 15 to 20% more
   C. 20 to 25% more
   D. 25 to 50% more

5. The approximate value of the ratio between direct tensile strength and flexural strength is_____________?

   A. 0.33
   B. 0.5
   C. 0.75
   D. 1.0

6. 1% of voids in a concrete mix would reduce its strength by about______________?

   A. 5%
   B. 10 %
   C. 15%
   D. 20%

7. For a simply supported beam of span 15m, the minimum effective depth to satisfy the vertical deflection limits should be________________?

   A. 600 mm
   B. 750 mm
   C. 900 mm
   D. more than 1 m

8. The main reason for providing number of reinforcing bars at a support in a simply supported beam is to resist in that zone_________________?

   A. compressive stress
   B. shear stress
   C. bond stress
   D. tensile stress

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. In a ring beam subjected to uniformly distributed load______________?

    1. shear force at mid span is zero
    2. shear force at mid span is maximum
    3. torsion at mid span is zero
    4. torsion at mid span is maximum
    The correct answer is ?

    A. (1) and (3)
    B. (1) and (4)
    C. (2) and (3)
    D. (2) and (4)