Top 250+ Solved RCC Structures Design MCQ Questions Answer
Q. An R.C.C. beam of 6 m span is 30 cm wide and has a lever arm of 55 cm. If it carries a U.D.L. of 12 t per m and allowable shear stress is 5 kg/cm2, thebeam
a. Is safe in shear
b. Is safe with stirrups
c. Is safe with stirrups and inclined bars
d. Needsrevision of section
Q. According to I.S. : 456, slabs which span in two directions with corners held down, are assumed to be divided in each direction into middle strips and edge strips such that the width of the middle strip, is
a. Half of the width of the slab
b. Two-third of the width of the slab
c. Three-fourth of the width of the slab
d. Four-fifth of the width of the slab
Q. The load stress of a section can be reduced by
a. Decreasing the lever arm
b. Increasing the total perimeter of bars
c. Replacing larger bars by greater number of smallbars
d. Replacing smaller bars by greater number of greater bars
Q. The diameter of the column head support a flat slab, is generally kept
a. 0.25 times the span length
b. 0.25 times the diameter of the column
c. 4.0 cm larger than the diameter of the column
d. 5.0 cm larger than the diameter of the column
Q. If is the uniformly distributed load on a circular slab of radius fixed at its ends, the maximum positive radial moment at its centre, is
a. 3WR²/16
b. 2WR²/16
c. WR²/16
d. None of these
Q. If the width of the foundation for two equal columns is restricted, the shape of the footing generally adopted, is
a. Square
b. Rectangular
c. Trapezoidal
d. Triangular
Q. In case the factor of safety against sliding is less than 1.5, a portion of slab is constructed downwards at the end of the heel slab, which is known as
a. A key
b. A cut-off wall
c. A rib
d. All the above
Q. Lapped splices in tensile reinforcement are generally not used for bars of size larger than
a. 18 mmdiameter
b. 24 mmdiameter
c. 30 mmdiameter
d. 36 mmdiameter
Q. Minimum spacing between horizontal parallel reinforcement of the same size should not be less than
a. Onediameter
b. 2.5diameters
c. 3 diameters
d. 3.5 diameters
Q. Columns may be made of plain concrete if their unsupported lengths do not exceed their least lateral dimension
a. Two times
b. Three times
c. Four times
d. Five times
Q. The width of the flange of a L-beam, should be less than
a. One-sixth of the effective span
b. Breadth of therib + four times thickness of the slab
c. Breadth of the rib + half clear distance betweenribs
d. Least of theabove
Q. A pre-stressed concrete member is preferred because
a. Its dimensions are not decided from the diagonal tensile stress
b. Large size of long beams carrying large shear force need not be adopted
c. Removal of cracks in the members due toshrinkage
d. All the above