RCC Structures Design MCQ

Test your knowledge with important RCC Structures Design MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30+ more RCC Structures Design MCQs on Bissoy. Bissoy App

• The maximum ratio of span to depth of a slab simply supported and spanning in two directions, is
  ক

  25

  খ

  30

  গ

  35

  ঘ

  40
• For stairs spanning horizontally, the minimum waist provided is
  ক

  4 cm

  খ

  6 cm

  গ

  8 cm

  ঘ

  12 cm
• Piles are usually driven by
  ক

  Diesel operated hammer

  খ

  Drop hammer

  গ

  Single acting steam hammer

  ঘ

  All the above
• The effective span of a simply supported slab, is
  ক

  Distance between the centers of the bearings

  খ

  Clear distance between the inner faces of the walls plus twice the thickness of the wall

  গ

  Clear span plus effective depth of the slab

  ঘ

  None of these
• A foundation rests on
  ক

  Base of the foundation

  খ

  Sub-grade

  গ

  Foundation soil

  ঘ

  Both B and C
• If the length of a wall on either side of a lintel opening is at least half of its effective span L, the load W carried by the lintel is equivalent to the weight of brickwork contained in an equilateral triangle, producing a maximum bending moment
  ক

  $$\frac{{{\text{WL}}}}{2}$$

  খ

  $$\frac{{{\text{WL}}}}{4}$$

  গ

  $$\frac{{{\text{WL}}}}{6}$$

  ঘ

  $$\frac{{{\text{WL}}}}{8}$$
• If diameter of a reinforcement bar is d, the anchorage value of the hook is
  ক

  4d

  খ

  8d

  গ

  12d

  ঘ

  16d
• A very comfortable type of stairs is
  ক

  Straight

  খ

  Dog legged

  গ

  Geometrical

  ঘ

  Open newel
• With usual notations the depth of the neutral axis of a balanced section, is given by
  ক

  $$\frac{{{\text{mc}}}}{{\text{t}}} = \frac{{{\text{d}} - {\text{n}}}}{{\text{n}}}$$

  খ

  $$\frac{{\text{t}}}{{{\text{mc}}}} = \frac{{\text{n}}}{{{\text{d}} - {\text{n}}}}$$

  গ

  $$\frac{{\text{t}}}{{{\text{mc}}}} = \frac{{{\text{d}} + {\text{n}}}}{{\text{n}}}$$

  ঘ

  $$\frac{{{\text{mc}}}}{{\text{t}}} = \frac{{\text{n}}}{{{\text{d}} - {\text{n}}}}$$
• For a number of columns constructed in a rcjw, the type of foundation provided, is
  ক

  Footing

  খ

  Raft

  গ

  Strap

  ঘ

  Strip
• In a cantilever retaining wall without a heel slab
  ক

  Thickness of the stem is kept same throughout

  খ

  Base slab is made 10 cm thicker than the stem

  গ

  Width of the base slab is kept 0.7 time the total height of the wall

  ঘ

  All the above
• On an absolutely rigid foundation base, the pressure will
  ক

  Be more at the edges of the foundation

  খ

  Be uniform

  গ

  Not be uniform

  ঘ

  Be zero at the centre of the foundation
• An R.C.C. beam not provided with shear reinforcement may develop cracks in its bottom inclined roughly to the horizontal at
  ক

  25°

  খ

  35°

  গ

  45°

  ঘ

  55°
• Post tensioning system
  ক

  Was widely used in earlier days

  খ

  Is not economical and hence not generally used

  গ

  Is economical for large spans and is adopted now a days

  ঘ

  None of these
• Spacing of stirrups in a rectangular beam, is
  ক

  Kept constant throughout the length

  খ

  Decreased towards the centre of the beam

  গ

  Increased at the ends

  ঘ

  Increased at the centre of the beam
• The minimum thickness of the cover at the end of a reinforcing bar should not be less than twice the diameter of the bar subject to a minimum of
  ক

  10 mm

  খ

  15 mm

  গ

  20 mm

  ঘ

  25 mm
• A flat slab is supported
  ক

  On beams

  খ

  On columns

  গ

  On beams and columns

  ঘ

  On columns monolithically built with slab
• In testing a pile by load test, pile platform is loaded with one and half times the design load and a maximum settlement is noted. The load is gradually removed and the consequent rebound is measured. For a safe pile, the net settlement (i.e. total settlement minus rebound) per tonne of test load should not exceed
  ক

  10 mm

  খ

  15 mm

  গ

  20 mm

  ঘ

  25 mm
• By over-reinforcing a beam, the moment of resistance can be increased not more than
  ক

  10%

  খ

  15%

  গ

  20%

  ঘ

  25%
• The shear reinforcement in R.C.C. is provided to resist
  ক

  Vertical shear

  খ

  Horizontal shear

  গ

  Diagonal compression

  ঘ

  Diagonal tension
• The minimum number of main steel bars provided in R.C.C.
  ক

  Rectangular columns is 4

  খ

  Circular columns is 6

  গ

  Octagonal columns is 8

  ঘ

  All the above
• The modular ratio ‘m’ of a concrete whose permissible compressive stress is ‘C’, may be obtained from the equation.
  ক

  $${\text{m}} = \frac{{700}}{{3{\text{C}}}}$$

  খ

  $${\text{m}} = \frac{{1400}}{{3{\text{C}}}}$$

  গ

  $${\text{m}} = \frac{{2800}}{{3{\text{C}}}}$$

  ঘ

  $${\text{m}} = \frac{{3500}}{{3{\text{C}}}}$$

  ঙ

  $${\text{m}} = \frac{{2300}}{{3{\text{C}}}}$$
• If T and R are the tread and rise of a stair which carries a load w per square metre on slope, the corresponding load per square metre of the horizontal area, is
  ক

  $$\frac{{{\text{w}}\left( {{\text{R}} + {\text{T}}} \right)}}{{\text{T}}}$$

  খ

  $$\frac{{{\text{w}}\sqrt {{{\text{R}}^2} + {{\text{T}}^2}} }}{{\text{T}}}$$

  গ

  $$\frac{{{\text{w}}\sqrt {{\text{R}} + {\text{T}}} }}{{\text{T}}}$$

  ঘ

  $${\text{w}}\frac{{\text{R}}}{{\text{T}}}$$
• Design of R.C.C. simply supported beams carrying U.D.L. is based on the resultant B.M. at
  ক

  Supports

  খ

  Mid span

  গ

  Every section

  ঘ

  Quarter span
• The minimum cube strength of concrete used for a pre-stressed member, is
  ক

  50 kg/cm²

  খ

  150 kg/cm²

  গ

  250 kg/cm²

  ঘ

  350 kg/cm²
• Dimensions of a beam need be changed if the shear stress is more than
  ক

  10 kg/cm²

  খ

  15 kg/cm²

  গ

  20 kg/cm²

  ঘ

  25 kg/cm²
• If the width of the foundation for two equal columns is restricted, the shape of the footing generally adopted, is
  ক

  Square

  খ

  Rectangular

  গ

  Trapezoidal

  ঘ

  Triangular
• For a circular slab carrying a uniformly distributed load, the ratio of the maximum negative to maximum positive radial moment, is
  ক

  1

  খ

  2

  গ

  3

  ঘ

  5
• Total pressure on the vertical face of a retaining wall of height ‘h’ per unit run exerted by the retained earth weighing ‘w’ per unit volume, is
  ক

  $${\text{wh}}\frac{{\left( {1 - \sin \varphi } \right)}}{{\left( {1 + \sin \varphi } \right)}}$$

  খ

  $${\text{w}}{{\text{h}}^2}\frac{{\left( {1 - \sin \varphi } \right)}}{{\left( {1 + \sin \varphi } \right)}}$$

  গ

  $$\frac{{{\text{w}}{{\text{h}}^2}\left( {1 - \sin \varphi } \right)}}{{2\left( {1 + \sin \varphi } \right)}}$$

  ঘ

  $$\frac{{{\text{w}}{{\text{h}}^2}\left( {1 - \sin \varphi } \right)}}{{3\left( {1 + \sin \varphi } \right)}}$$
• The minimum head room over a stair must be
  ক

  200 cm

  খ

  205 cm

  গ

  210 cm

  ঘ

  230 cm