11. 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
✅ The correct answer is option B.
Design of Concrete Structures MCQs
12. 1% of voids in a concrete mix would reduce its strength by about______________?
A. 5%
B. 10 %
C. 15%
D. 20%
✅ The correct answer is option A.
13. 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
✅ The correct answer is option A.
14. One of the criteria for the effecvve width of flange of T-beam is bf =—+ bw +6Df 6 In above formula, l0 signifies_______________?
A. effective span of T-beam
B. distance between points of zero moments in the beam
C. distance between points of maximum moments in the beam
D. clear span of the T-beam
✅ The correct answer is option B.
15. Finer grinding of cement______________?
A. affects only the early development of strength
B. affects only the ultimate strength
C. both (A. and (B.
D. does not affect the strength
✅ The correct answer is option A.
16. For walls, columns and vertical faces of all structural members, the form work is generally removed after_______________?
A. 24 to 48 hours
B. 3 days
C. 7 days
D. 14 days
✅ The correct answer is option A.
17. If the storey height is equal to length of RCC wall, the percentage increase in strength is_____________?
A. 0
B. 10
C. 20
D. 30
✅ The correct answer is option B.
18. Prestress loss due to friction occurs________________?
A. only in post-tensioned beams
B. only in pretensioned beams
C. in both post-tensioned and preten-sioned beams
D. none of the above
✅ The correct answer is option A.
19. 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
✅ The correct answer is option A.
20. Maximum percentage reinforcement in case of slabs is limited to___________________?
A. 2
B. 4
C. 6
D. 8
✅ The correct answer is option B.