81. To determine the modulus of rupture, the size of test specimen used is_______________?
A. 150 x150 x500 mm
B. 100 x100 x700 mm
C. 150 x150 x700 mm
D. 100 x100 x500 mm
✅ The correct answer is option C.
Design of Concrete Structures MCQs
82. A beam curved in plan is designed for_______________?
A. bending moment and shear
B. bending moment and torsion
C. shear and torsion
D. bending moment, shear and torsion
✅ The correct answer is option D.
83. A T-shaped retaining wall mainly conssits of_________________?
A. one cantilever
B. two cantilevers
C. three cantilevers
D. four cantilevers
✅ The correct answer is option C.
84. According to IS: 456-1978, the maximum reinforcement in a column is_____________?
A. 2 %
B. 4%
C. 6 %
D. 8 %
✅ The correct answer is option C.
85. Minimum pitch of transverse reinforcement in a column is________________?
A. the least lateral dimension of the member
B. sixteen times the smallest diameter of longitudinal reinforcement bar to be tied
C. forty-eight times the diameter of transverse reinforcement
D. lesser of the above three values
✅ The correct answer is option D.
86. 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
✅ The correct answer is option C.
87. Maximum quantity of water needed per 50 kg of cement for M 15 grade of concrete is_______________?
A. 28 liters
B. 30 liters
C. 32 liters
D. 34 liters
✅ The correct answer is option C.
88. Which of the following statements is incorrect ?
A. Minimum cross sectional area of longitudinal reinforcement in a column is 0.8%
B. Spacing of longitudinal bars measured along the periphery of column should not exceed 300 mm
C. Reinforcing bars in a column should not be less than 12 mm in diameter
D. The number of longitudinal bars provided in a circular column should not be less than four
✅ The correct answer is option D.
89. For a reinforced concrete section, the shape of shear stress diagram is_______________?
A. wholly parabolic
B. wholly rectangular
C. parabolic above neutral axis and rectangular below neutral axis
D. rectangular above neutral axis and parabolic below neutral axis
✅ The correct answer is option C.
90. Workability of concrete is directly proportional to________________?
A. aggregate cement ratio
B. time of transit
C. grading of the aggregate
D. all of above
✅ The correct answer is option C.