41. The property of fresh concrete, in which the water in the mix tends to rise to the surface while placing and compacting, is called________________?
A. segregation
B. bleeding
C. bulking
D. creep
✅ The correct answer is option B.
Design of Concrete Structures MCQs
42. Poisson’s ratio for concrete_______________?
A. remains constant
B. increases with richer mixes
C. decreases with richer mixes
D. none of the above
✅ The correct answer is option B.
43. In case of hand mixing of concrete, the extra cement to be added is__________________?
A. 5%
B. 10%
C. 15%
D. 20%
✅ The correct answer is option B.
44. Admixtures which cause early setting, and hardening of concrete are called_______________?
A. workability admixtures
B. accelerators
C. retarders
D. air entraining agents
✅ The correct answer is option B.
45. For the design of retaining walls, the minimum factor of safety against overturning is taken as_____________?
A. 1.5
B. 2.0
C. 2.5
D. 3.0
✅ The correct answer is option B.
46. The effect of creep on modular ratio is__________________?
A. to decrease it
B. to increase it
C. either to decrease or to increase it
D. to keep it unchanged
✅ The correct answer is option B.
47. Which of the following has high tensile strength ?
A. plain hot rolled wires
B. cold drawn wires
C. heat treated rolled wires
D. all have same tensile strength
✅ The correct answer is option B.
48. 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
✅ The correct answer is option B.
49. 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
✅ The correct answer is option B.
50. Critical section for shear in case of flat slabs is at a distance of_______________?
A. effective depth of slab from periphery of column/drop panel
B. d/2 from periphery of column/capital/ drop panel
C. at the drop panel of slab
D. at the periphery of column
✅ The correct answer is option B.