Top 250+ Solved RCC Structures Design MCQ Questions Answer
Q. According to I.S.: 456, 1978 the thickness of reinforced concrete footing on piles at its edges, is kept less than
a. 5 cm
b. 10 cm
c. 15 cm
d. 20 cm
Q. If l1 and l2 are the lengths of long and short spans of a two way slab simply supported on four edges and carrying a load w per unit area, the ratio of the loads split into w1 and w2acting on strips parallel to l2 and l1 is
a. w1/w2 = l2/l1
b. w1/w2 = (l2/l1)²
c. w1/w2 = (l2/l1)3
d. w1/w2 = (l2/l1)4
Q. The live load to be considered for an accessible roof, is
a. Nil
b. 75 kg/m3
c. 150 kg/m2
d. 200 kg/cm2
Q. If Ac, Asc and A are areas of concrete, longitudinal steel and section of a R.C.C. column and m and c are the modular ratio and maximum stress in the configuration of concrete, the strength of column is
a. cAc + m cAsc
b. c(A - Asc) + m cAsc
c. c[A + (m - 1)ASC]
d. All the above
Q. On an absolutely rigid foundation base, the pressure will
a. Be more at the edges of thefoundation
b. Be uniform
c. Not be uniform
d. Be zero at the centre of the foundation
Q. If longitudinally spanning stairs are casted along with their landings, the maximum bending moment per metre width, is taken as
a. wl²/4
b. wl²/8
c. wl²/10
d. wl²/12
Q. If P kg/m2 is the upward pressure on the slab of a plain concrete footing whose projection on either side of the wall is a cm, the depth of foundation D is given by
a. D = 0.00775 aP
b. D = 0.0775 aP
c. D = 0.07775 aP
d. D = 0.775 Pa
Q. If the shear stress in a R.C.C. beam is
a. Equal or less than 5 kg/cm2, no shear reinforcement isprovided
b. Greater than 4 kg/cm2, but less than 20 kg/cm2, shear reinforcement is provided
c. Greater than 20 kg/cm2, the size of the section ischanged
d. All the above
Q. For a continuous floor slab supported on beams, the ratio of end span length and intermediate span length, is
a. 0.6
b. 0.7
c. 0.8
d. 0.9
Q. In a singly reinforced beam
a. Compression is borne entirely by concrete
b. Steel possesses initial stresses when embedded in concrete
c. Plane sectionstransverse to the centre line ofthe beam before bending remain plane after bending
d. Elasticmoduli for concrete and steel have different values within the limits of deformation of the beam
Q. In a cantilever retaining wall without a heel slab
a. Thickness ofthe stem is keptsame throughout
b. Base slab is made 10 cm thicker than the stem
c. Width of the base slab is kept 0.7 time the total height of the wall
d. All the above
Q. is the pre-stressed force applied to the tendon of a rectangular pre-stressed beam whose area of cross section is and sectional modulus is . The maximum stress in the beam, subjected to a maximum bending moment , is
a. f = (P/A) +(Z/M)
b. f = (A/P) +(M/Z)
c. f = (P/A) + (M/Z)
d. f = (P/A) + (M/6Z)
Q. A T-beam behaves as a rectangular beam of a width equal to its flange if its neutral axis
a. Remains within the flange
b. Remains below the slab
c. Coincides the geometrical centre of thebeam
d. None of these