91. In working stress design, permissible bond stress in the case of deformed bars is more than that in plain bars by_______________?
A. 10%
B. 20%
C. 30%
D. 40%
✅ The correct answer is option D.
Design of Concrete Structures MCQs
92. Maximum distance between expansion joints in structures as per IS : 456 – 1978 is________________?
A. 20 m
B. 30 m
C. 45 m
D. 60 m
✅ The correct answer is option C.
93. If the foundations of all the columns of a structure are designed on the total live and dead load basis, then_________________?
A. there will be no settlement of columns
B. there will be no differential settlement
C. the settlement of exterior columns will be more than interior columns
D. the settlement of interior columns will be more than exterior columns
✅ The correct answer is option C.
94. The diameter of ties in a column should be_______________?
A. more than or equal to one fourth of diameter of main bar
B. more than or equal to 5 mm
C. more than 5 mm but less than one-fourth of diameter of main bar
D. more than 5 mm and also more than one-fourth of diameter of main bar
✅ The correct answer is option D.
95. To minimise the effect of differential settlement, the area of a footing should be designed for______________?
A. dead load only
B. dead load + live load
C. dead load + fraction of live load
D. live load + fraction of dead load
✅ The correct answer is option C.
96. If the depth of actual neutral axis in a beam is more than the depth of critical neutral axis, then the beam is called________________?
A. balanced beam
B. under-reinforced beam
C. over-reinforced beam
D. none of the above
✅ The correct answer is option C.
97. For a longitudinal reinforcing bar in a column, the minimum cover shall neither be less than the diameter of bar nor less than_______________?
A. 15 mm
B. 25 mm
C. 30 mm
D. 40 mm
✅ The correct answer is option D.
98. During erection, the pile of length / is supported by a crane at a distance of________________?
A. 0.207 /
B. 0.293 /
C. 0.7071
D. 0.793 /
✅ The correct answer is option C.
99. Half of the main steel in a simply supported slab is bent up near the support at a distance of x from the center of slab bearing where x is equal to________________?
A. 1/3
B. 1/5
C. 1/7
D. 1/10
✅ The correct answer is option C.
100. The ratio of the diameter of reinforcing bars and the slab thickness is_______________?
A. 1/4
B. 1/5
C. 1/6
D. 1/8
✅ The correct answer is option D.