A. to provide adequate bond stress
B. to resist tensile stresses
C. to impart initial compressive stress in concrete
D. all of the above
✅ The correct answer is option C.
Design of Concrete Structures MCQs
62. The load factors for live load and dead load are taken respectively as_________________?
A. 1.5 and 2.2
B. 2.2 and 1.5
C. 1.5 and 1.5
D. 2.2 and 2.2
✅ The correct answer is option B.
63. The minimum cover in a slab should neither be less than the diameter of bar nor less than_______________?
A. 10 mm
B. 15 mm
C. 25 mm
D. 13 mm
✅ The correct answer is option B.
64. In a spherical dome subjected to concentrated load at crown or uniformly distributed load, the meridional force is always________________?
A. zero
B. tensile
C. compressive
D. tensile or compressive
✅ The correct answer is option C.
65. 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
✅ The correct answer is option B.
66. The maximum value of hoop compression in a dome is given by___________________?
A. wR / 4d
B. wR/2d
C. wR/d
D. 2wR/d
✅ The correct answer is option B.
67. The minimum diameter of longitudinal bars in a column is________________?
A. 6 mm
B. 8 mm
C. 12 mm
D. 16 mm
✅ The correct answer is option C.
68. The percentage of reinforcement in case of slabs, when high strength deformed bars are used is not less than________________?
A. 0.15
B. 0.12
C. 0.30
D. 1.00
✅ The correct answer is option B.
69. Cube strength of controlled concrete to be used for pretensioned and post-tensioned work respectively should not be less than__________________?
A. 35 MPa and 42 MPa
B. 42 MPa and 35 MPa
C. 42 MPa and 53 MPa
D. 53 MPa and 42 MPa
✅ The correct answer is option B.
70. The load carrying capacity of a helically reinforced column as compared to that of a tied column is about________________?
A. 5% less
B. 10% less
C. 5% more
D. 10% more
✅ The correct answer is option C.