141. The maximum ratio of span to depth of a cantilever slab, is_______________?
A. 8
B. 10
C. 12
D. 16
✅ The correct answer is option C.
RCC Structures Design MCQs
142. If W is total load per unit area on a panel, D is the diameter of the column head, L is the span in two directions, then the sum of the maximum positive bending moment and average of the negative bending moment for the design of the span of a square flat slab, should not be less than________________?
A. WL/12 (L – 2D/3)²
B. WL/10 (L + 2D/3)²
C. WL/10 (L – 2D/3)²
D. WL/12 (L – D/3)²
✅ The correct answer is option C.
143. Cantilever retaining walls can safely be used for a height not more than_______________?
A. 3 m
B. 4 m
C. 5 m
D. 6 m
✅ The correct answer is option D.
144. per unit run exerted by the Total pressure on the vertical face of a retaining wall of height retained earth weighing per unit volume, is___________________?
A. wh [(1 – )/(1 + sin )]
B. wh² [(1 – )/(1 + sin )]
C. wh² [(1 – )/2(1 + sin )]
D. wh² [(1 – )/3(1 + sin )]
✅ The correct answer is option C.
145. The length of the lap in a compression member is kept greater than bar diameter x (Permissible stress in bar / Five times the bond stress) or____________________?
A. 12 bar diameters
B. 18 bar diameters
C. 24 bar diameters
D. 30 bar diameters
✅ The correct answer is option C.
146. In a simply supported slab, alternate bars are curtailed at________________?
A. 1/4th of the span
B. 1/5th of the span
C. 1/6th of the span
D. 1/7th of the span
✅ The correct answer is option D.
147. The maximum diameter of a bar used in a ribbed slab, is______________?
A. 12 mm
B. 6 mm
C. 20 mm
D. 22 mm
✅ The correct answer is option D.
148. Post tensioning system_______________?
A. Was widely used in earlier days
B. Is not economical and hence not generally used
C. Is economical for large spans and is adopted now a days
D. None of these
✅ The correct answer is option D.
149. Pick up the incorrect statement from the following?
A. In the stem of a retaining wall, reinforcement is provided near the earth side
B. In the toe slab of a retaining wall, reinforcement is provided at the bottom of the slab
C. In the heel slab of a retaining wall, reinforcement is provided at the top of the slab
D. None of these
✅ The correct answer is option D.
150. If the average bending stress is 6 kg/cm2 for M 150 grade concrete, the length of embedment of a bar of diameter d according to I.S. 456 specifications, is__________________?
A. 28 d
B. 38 d
C. 48 d
D. 58 d
✅ The correct answer is option D.