2. For a continuous floor slab supported on beams, the ratio of end span length and intermediate span length, is
Correct : D. 0.9
3. In a singly reinforced beam
Correct : C. Plane sectionstransverse to the centre line ofthe beam before bending remain plane after bending
4. The ratio of the breadth to effective depth of a beam is kept
Correct : B. 0.50
5. In a cantilever retaining wall without a heel slab
Correct : D. All the above
6. 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
Correct : C. f = (P/A) + (M/Z)
7. A T-beam behaves as a rectangular beam of a width equal to its flange if its neutral axis
Correct : A. Remains within the flange
8. For the design of a simply supported T-beam the ratio of the effective span to the overall depth of the beam is limited to
Correct : C. 20
9. A reinforced concrete cantilever beam is 3.6 m long, 25 cm wide and has its lever arm 40 cm. It carries a load of 1200 kg at its free end and vertical stirrups can carry 1800 kg. Assuming concrete to carry one-third of the diagonal tension and ignoring the weight of the beam, the number of shear stirrups required, is
Correct : C. 40
10. The width of the rib of a T-beam, is generally kept between
Correct : D. 1/3 to 2/3 of rib depth
11. A ribbed slab is provided for
Correct : D. All the above
12. To ensure that the hogging bending moment at two points of suspension of a pile of length L equals the sagging moment at its centre, the distances of the points of suspension from either end, is
Correct : B. 0.207 L
13. The stresses developed in concrete and steel in reinforced concrete beam 25 cm width and 70 cm effective depth, are 62.5 kg/cm2 and 250 kg/cm2 respectively. If m = 15, the depth of its neutral axis is
Correct : C. 30 cm
14. If the depth of actual neutral axis of a doubly reinforced beam
Correct : D. All the above
15. If the modularratio is , steel ratio is and overalldepth of a beam is , the depth ofthe critical neutral axis of the beam, is
Correct : B. [m/(m + r)] d
16. The maximum diameter of a bar used in a ribbed slab, is
Correct : D. 22 mm
17. A column is regarded as long column if the ratio of its effective length and lateral dimension, exceeds
Correct : B. 15
18. According to the steel beam theory of doubly reinforced beams
Correct : D. All the above
19. The breadth of a ribbed slab containing two bars must be between
Correct : B. 8 cm to 10 cm
20. The stem of a cantilever retaining wall which retains earth level with top is 6 m. If the angle of repose and weight of the soil per cubic metre are 30° and 2000 kg respectively, the effective width of the stem at the bottom, is
Correct : C. 53.5
21. If the diameter of the main reinforcement in a slab is 16 mm, the concrete cover to
main bars is
Correct : D. 16 mm
22. Minimum spacing between horizontal parallel reinforcement of different sizes, should not be less than
Correct : B. One diameter ofthicker bar
23. For a number of columns constructed in a rcjw, the type of foundation provided, is
Correct : D. Strip
24. A singly reinforced concrete beam of 25 cm width and 70 cm effective depth is provided with 18.75 cm2 steel. If the modular ratio (m) is 15, the depth of the neutral axis, is
Correct : C. 30 cm
25. 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
Correct : D. 25 mm
26. The diameter of main bars in R.C.C. columns, shall not be less than
Correct : D. 12 mm
27. If d is the diameter of a bar, ft is allowable tensile stress and fb, is allowable bond
stress, the bond length is given by
Correct : A. ft.d/4fb
28. An intermediate T-beam reinforced with two layers of tensile steel with clear cover 13 cm encasted with the floor of a hall 12 metres by 7 metres, is spaced at 3 metres from adjoining beams and if the width of the beam is 20 cm, the breadth of the flange is
Correct : C. 176 cm
29. The length of lap in tension reinforcement should not be less than the bar diameter × (actual tension / four times the permissible average bond stress) if it is more than
Correct : C. 30 bardiameters
30. As the percentage of steel increases
Correct : B. Depth of neutral axis increases
31. The effective width of a column strip of a flat slab, is
Correct : B. Half the width of the panel
32. As per IS : 1343, total shrinkage for a pre-tensioned beam, is
Correct : D. 3.5 × 10-5
33. Dimensions of a beam need be changed if the shear stress is more than
Correct : C. 20 kg/cm2
34. Based on punching shear consideration, the overall depth of a combined footing under a column A, is
Correct : B. (Perimeter of column A × Safe punching stress)/(Load on column A + Upward pressure × Area of the column)
35. Pick up the correct statement from the following:
Correct : B. A pile is a slender member which transfers its load to the surrounding soil
36. In a combined footing if shear stress exceeds 5 kg/cm2 , the nominal stirrups provided are:
Correct : D. 12 legged
37. The weight of reinforced concrete, is generally taken as
Correct : C. 2400 kg/m3
38. If W is the load on a circular slab of radius R, the maximum circumferential moment
at the centre of the slab, is
Correct : C. 3WR²/16
39. If is weight of a retainingwall and is the horizontal earth pressure, the factor of safety against sliding, is
Correct : C. 1.5
40. The effective span of a simply supported slab, is
Correct : B. Clear distance between the inner faces of the walls plus twice the thickness of the wall
41. In a beam the local bond stress Sb, is equal to
Correct : A. Shearforce/(Leaver arm× Total perimeter ofreinforcement)
42. A continuous beam shall be deemed to be a deep beam if the ratio of effective span to overall depth, is
Correct : A. 2.5
43. With usual notations the depth of the neutral axis of a balanced section, is given by
Correct : D. mc/t = n/(d - n)
44. Pick up the true statement from the following:
Correct : D. All the above
45. If the maximum shear stress at the end of a simply supported R.C.C. beam of 16 m effective span is 10 kg/cm2 , the length of the beam having nominal reinforcement, is
Correct : C. 8 m
46. 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
Correct : C. WL/6
47. The section of a reinforced beam where most distant concrete fibre in compression and tension in steel attains permissible stresses simultaneously, is called
Correct : D. All the above
48. 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
Correct : C. 24 bardiameters
49. The system in which high tensile alloy steel bars (silica manganese steel) are used as prestressing tendons, is known as
Correct : D. Lee-McCallsystem
50. An under-reinforced section means
Correct : D. Steel will yieldfirst
51. The angle of repose of a soil is the maximum angle which the outer face of the soil mass makes
Correct : A. With the horizontal
52. In a doubly-reinforced beam if and is the effective depth and is depth of critical neutral axis, the following relationship holds good
Correct : A. mc/t = n/(d - n)
53. A raft foundation is provided if its area exceeds the plan area of the building by
Correct : D. 50%
54. In favourable circumstances a 15 cm concrete cube after 28 days, attains a maximum crushing strength
Correct : D. 400 kg/cm2
55. If p1 is the vertical intensity of pressure at a depth h on a block of earth weighing w per unit p2 is
Correct : B. wh (1 - sin )/(1 + )
56. Pick up the incorrect statement from the following. The intensity of horizontal shear stress at the elemental part of a beam section, is directly proportional to
Correct : D. Moment of the beam section about its neutral axis
57. According to I.S.: 456, 1978 the thickness of reinforced concrete footing on piles at its edges, is kept less than
Correct : B. 30 cm
58. An R.C.C. beam of 25 cm width and 50 cm effective depth has a clear span of 6 metres and carries a U.D.L. of 3000 kg/m inclusive of its self weight. If the lever arm constant for the section is 0.865, the maximum intensity of shear stress, is
Correct : A. 8.3 kg/cm2
59. The percentage of minimum reinforcement of the gross sectional area in slabs, is
Correct : C. 0.15 %
60. If the permissible compressive stress for a concrete in bending is C kg/m2 , the modular ratio is
Correct : C. 2800/3C
61. An R.C.C. beam not provided with shear reinforcement may develop cracks in its bottom inclined roughly to the horizontal at
Correct : C. 45°
62. Cantilever retaining walls can safely be used for a height not more than
Correct : D. 6 m
63. The maximum area of tension reinforcement in beams shall not exceed
Correct : C. 4 %
64. The width of the flange of a T-beam should be less than
Correct : D. Least of theabove
65. For a circular slab carrying a uniformly distributed load, the ratio of the maximum
negative to maximum positive radial moment, is
Correct : B. 2
66. According to I.S. : 456 specifications, the safe diagonal tensile stress for M 150 grade
concrete, is
Correct : A. 5 kg/cm2
67. The width of the flange of a T-beam, which may be considered to act effectively with
the rib depends upon
Correct : D. All the above
68. The maximum shear stress (qmax) in a rectangular beam is
Correct : B. 1.50 timesthe average
69. If the sides of a slab simply supported on edges and spanning in two directions are equal, the maximum bending moment is multiplied by
Correct : D. 0.5
70. If K is a constant depending upon the ratio of the width of the slab to its effective span l, x is the distance of the concentrated load from the nearer support, bw is the width of the area of contact of the concentrated load measured parallel to the supported edge, the effective width of the slab be is
Correct : B. Kx (1 - x/l) + bw
71. The length of the straight portion of a bar beyond the end of the hook, should be at least
Correct : D. Seventimes the diameter
72. If the maximum bending moment of a simply supported slab is M Kg.cm, the effective depth of the slab is (where Q is M.R. factor)
Correct : D. (M/100Q)
73. If is the overall height of a retaining wall retaining a surcharge, the width of
the base slab usually provided, is
Correct : D. 0.7 H
74. If diameter of a reinforcement bar is d, the anchorage value of the hook is
Correct : D. 16d
75. As per I.S. 456 - 1978, the pH value of water shall be
Correct : C. Not less than 6
76. For M 150 mix concrete, according to I.S. specifications, local bond stress, is
Correct : B. 10 kg/cm2
77. The minimum cube strength of concrete used for a pre-stressed member, is
Correct : D. 350 kg/cm2
78. If d and n are the effective depth and depth of the neutral axis respectively of a singly reinforced beam, the lever arm of the beam, is
Correct : D. d - n/3
79. The weight of a foundation is assumed as
Correct : C. 10% of wall weight
80. An R.C.C. column of 30 cm diameter is reinforced with 6 bars 12 mm placed symmetrically along the circumference. If it carries a load of 40, 000 kg axially, the stress is
Correct : A. 49.9 kg/cm2
81. If the diameter of longitudinal bars of a square column is 16 mm, the diameter of
lateral ties should not be less than
Correct : B. 5 mm
82. Design of R.C.C. cantilever beams, is based on the resultant force at
Correct : A. Fixed end
83. In a combined footing if shear stress does not exceed 5 kg/cm2 , the nominal stirrups provided are
Correct : B. 8 legged
84. The maximum shear stress (q) in concrete of a reinforced cement concrete beam is
Correct : A. Shearforce/(Lever arm×Width)
85. An R.C.C. column is treated as long if its slenderness ratio is greater than
Correct : D. 50
86. The thickness of base slab of a retaining wall generally provided, is
Correct : D. Width of the stem at the bottom
87. Design of R.C.C. simply supported beams carrying U.D.L. is based on the resultant B.M. at
Correct : B. Mid span
88. If the maximum shear stress at the end of a simply supported R.C.C. beam of 6 m effective span is 10 kg/cm2 , the share stirrups are provided for a distance from either end where, is
Correct : C. 150 cm
89. Distribution reinforcement in a simply supported slab, is provided to distribute
Correct : D. All the above
90. Distribution of shear intensity over a rectangular section of a beam, follows:
Correct : C. A parabolic curve
91. In a singly reinforced beam, if the permissible stress in concrete reaches earlier than that in steel, the beam section is called
Correct : B. Over reinforced section
92. If the size of a column is reduced above the floor, the main bars of the columns, are
Correct : D. All the above
93. The minimum number of main steel bars provided in R.C.C.
Correct : D. All the above
94. If T and R are tread and rise respectively of a stair, then
Correct : A. 2R + T =60
95. For stairs spanning l metres longitudinally between supports at the bottom and top of a flight carrying a load w per unit horizontal area, the maximum bending moment per metre width, is
Correct : D. wl²/16
96. In a singly reinforced beam, the effective depth is measured from its compression edge to
Correct : B. Tensile reinforcement
97. Though the effective depth of a T-beam is the distance between the top compression edge to the centre of the tensile reinforcement, for heavy loads, it is taken as
Correct : C. 1/12th of thespan
98. On piles, the drop must be at least
Correct : C. 120 cm
99. Steel beam theory is used for
Correct : C. Doubly reinforced beams ignoring compressive stress inconcrete
100. In a pre-stressed beam carrying an external load W with a bent tendon is having angle of -stressed load P. The net downward load at the centre is