A. front face only
B. inner face only
C. both front face and inner face
D. none of the above
✅ The correct answer is option A.
Design of Concrete Structures MCQs
2. Which of the following losses of prestress occurs only in pretensioning and not in post-tensioning ?
A. elastic shortening of concrete
B. shrinkage of concrete
C. creep of concrete
D. loss due to friction
✅ The correct answer is option A.
3. High carbon content in the steel causes_______________?
A. decrease in tensile strength but increase in ductility
B. increase in tensile strength but decrease in ductility
C. decrease in both tensile strength and ductility
D. increase in both tensile strength and ductility
✅ The correct answer is option B.
4. The most commonly used admixture which prolongs the setting and hardening time is_______________?
A. gypsum
B. calcium chloride
C. sodium silicate
D. all of the above
✅ The correct answer is option A.
5. For a continuous slab of 3 m x 3.5 m size, the minimum overall depth of slab to satisfy vertical deflection limits is__________________?
A. 50 mm
B. 75 mm
C. 100 mm
D. 120 mm
✅ The correct answer is option B.
6. According to IS : 456- 1978, minimum slenderness ratio for a short column is_______________?
A. less than 12
B. less than 18
C. between 18 and 24
D. more than 24
✅ The correct answer is option A.
7. 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
✅ The correct answer is option A.
8. 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
✅ The correct answer is option B.
9. Increase in the moisture content in concrete_________________?
A. reduces the strength
B. increases the strength
C. does not change the strength
D. all of the above
✅ The correct answer is option A.
10. The property of the ingredients to separate from each other while placing the concrete is called____________?
A. segregation
B. compaction
C. shrinkage
D. bulking
✅ The correct answer is option A.