MCQOPTIONS
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MCQOPTIONS
This section includes 164 Mcqs, each offering curated multiple-choice questions to sharpen your Civil Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
If the diameter of the main reinforcement in a slab is 16 mm, the concrete cover to main bars is |
| A. | 12 mm |
| B. | 13 mm |
| C. | 14 mm |
| D. | 15 mm |
| Answer» E. | |
| 52. |
The length of the straight portion of a bar beyond the end of the hook, should be at least |
| A. | twice the diameter |
| B. | thrice the diameter |
| C. | four times the diameter |
| D. | five times the diameter |
| Answer» E. | |
| 53. |
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 |
| A. | 8.3 kg/cm2 |
| B. | 7.6 kg/cm2 |
| C. | 21.5 kg/cm2 |
| D. | 11.4 kg/cm2 |
| Answer» B. 7.6 kg/cm2 | |
| 54. |
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 |
| Answer» D. 20 cm | |
| 55. |
The maximum permissible size of aggregates to be used in casting the ribs of a slab, is |
| A. | 5 mm |
| B. | 7.5 mm |
| C. | 10 mm |
| D. | 15 mm |
| Answer» D. 15 mm | |
| 56. |
If Ac, Asc and A are areas of concrete, longitudinal steel and section of a R.C.C. column and m and σc are the modular ratio and maximum stress in the configuration of concrete, the strength of column is |
| A. | σcAc + m σcAsc |
| B. | σc(A - Asc) + m σcAsc |
| C. | σc[A + (m - 1)ASC] |
| D. | all the above. |
| Answer» E. | |
| 57. |
By over-reinforcing a beam, the moment of resistance can be increased not more than |
| A. | 0.1 |
| B. | 0.15 |
| C. | 0.2 |
| D. | 0.25 |
| Answer» E. | |
| 58. |
A foundation is called shallow if its depth, is |
| A. | one-fourth of its width |
| B. | half of its width |
| C. | three-fourth of its width |
| D. | equal to its width |
| Answer» E. | |
| 59. |
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 |
| Answer» E. | |
| 60. |
The minimum clear cover for R.C.C. columns shall be |
| A. | greater of 40 mm or diameter |
| B. | smaller of 40 mm or diameter |
| C. | greater of 25 mm or diameter |
| D. | smaller of 25 mm or diameter |
| Answer» D. smaller of 25 mm or diameter | |
| 61. |
The live load to be considered for an inaccessible roof, is |
| A. | Nil |
| B. | 75 kg/m2 |
| C. | 150 kg/cm2 |
| D. | 200 kg/m2 |
| Answer» C. 150 kg/cm2 | |
| 62. |
The neutral axis of a T-beam exists |
| A. | within the flange |
| B. | at the bottom edge of the slab |
| C. | below the slab |
| D. | all the above. |
| Answer» E. | |
| 63. |
The maximum ratio of span to depth of a cantilever slab, is |
| A. | 8 |
| B. | 10 |
| C. | 12 |
| D. | 14 |
| Answer» D. 14 | |
| 64. |
To ensure uniform pressure distribution, the thickness of the foundation, is |
| A. | kept uniform throughout |
| B. | increased gradually towards the edge |
| C. | decreased gradually towards the edge |
| D. | kept zero at the edge. |
| Answer» D. kept zero at the edge. | |
| 65. |
The length of lap in tension reinforcement should not be less than the bar diameter x (actual tension / four times the permissible average bond stress) if it is more than |
| A. | 18 bar diameters |
| B. | 24 bar diameters |
| C. | 30 bar diameters |
| D. | 36 bar diameters |
| Answer» D. 36 bar diameters | |
| 66. |
If H is the overall height of a retaining wall retaining a surcharge, the width of the base slab usually provided, is |
| A. | 0.3 H |
| B. | 0.4 H |
| C. | 0.5 H |
| D. | 0.6 H |
| Answer» E. | |
| 67. |
The thickness of the topping of a ribbed slab, varies between |
| A. | 3 cm to 5 cm |
| B. | 5 cm to 8 cm |
| C. | 8 cm to 10 cm |
| D. | 12 cm to 15 cm |
| Answer» C. 8 cm to 10 cm | |
| 68. |
The angle of internal friction of soil mass is the angle whose |
| A. | tangent is equal to the rate of the maximum resistance to sliding on any internal inclined plane to the normal pressure acting on the plane |
| B. | sine is equal to the ratio of the maximum resistance to sliding on any internal inclined plane to the normal pressure acting on the plane |
| C. | cosine is equal to the ratio of the maximum resistance sliding on any internal inclined plane to the normal pressure acting on the plane |
| D. | none of these. |
| Answer» B. sine is equal to the ratio of the maximum resistance to sliding on any internal inclined plane to the normal pressure acting on the plane | |
| 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 |
| A. | 0.2 |
| B. | 0.3 |
| C. | 0.4 |
| D. | 0.5 |
| Answer» E. | |
| 70. |
If At is the gross area of steel in tension, d is the effective depth of the beam and y is the depth of the centre of gravity of the resultant compression, the moment of resistance M of the beam, is given by |
| A. | M = At(d - y) |
| B. | M = Atf(d - y) |
| C. | M = Atf(d + y) |
| D. | M = |
| Answer» D. M = | |
| 71. |
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 x from either end where x is |
| A. | 50 cm |
| B. | 100 cm |
| C. | 150 cm |
| D. | 200 cm |
| Answer» D. 200 cm | |
| 72. |
If depth of slab is 10 cm, width of web 30 cm, depth of web 50 cm, centre to centre distance of beams 3 m, effective span of beams 6 m, the effective flange width of the beam, is |
| A. | 200 cm |
| B. | 300 cm |
| C. | 150 cm |
| D. | 100 cm |
| Answer» D. 100 cm | |
| 73. |
The radius of a bar bend to form a hook, should not be less than |
| A. | twice the diameter |
| B. | thrice the diameter |
| C. | four times the diameter |
| D. | five times the diameter |
| Answer» B. thrice the diameter | |
| 74. |
Distribution of shear intensity over a rectangular section of a beam, follows : |
| A. | a circular curve |
| B. | a straight line |
| C. | a parabolic curve |
| D. | an elliptical curve |
| Answer» D. an elliptical curve | |
| 75. |
The section of a reinforced beam where most distant concrete fibre in compression and tension in steel attains permissible stressess simultaneously, is called |
| A. | balanced section |
| B. | economic section |
| C. | critical section |
| D. | all the above. |
| Answer» E. | |
| 76. |
If the bearing capacity of soil is 10 tonnes/cm2 and the projection of plain concrete footing from walls, is a cm, the depth D of footing is |
| A. | D = 0.0775 a |
| B. | D = 0.775 a |
| C. | D = 0.775a |
| D. | D = 0.775 a2 |
| Answer» C. D = 0.775a | |
| 77. |
The horizontal portion of a step in a stairs case, is known as |
| A. | rise |
| B. | flight |
| C. | winder |
| D. | tread. |
| Answer» E. | |
| 78. |
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 |
| A. | 20 cm |
| B. | 25 cm |
| C. | 30 cm |
| D. | 35 cm |
| Answer» D. 35 cm | |
| 79. |
The system in which high tensile alloy steel bars (silica manganese steel) are used as prestressing tendons, is known as |
| A. | Freyssinet system |
| B. | Magnel-Blaton system |
| C. | C.C.L. standard system |
| D. | Lee-McCall system. |
| Answer» E. | |
| 80. |
The maximum diameter of a bar used in a ribbed slab, is |
| A. | 12 mm |
| B. | 6 mm |
| C. | 20 mm |
| D. | 22 mm |
| Answer» E. | |
| 81. |
The ratio of the breadth to effective depth of a beam is kept |
| A. | 0.25 |
| B. | 0.5 |
| C. | 0.7 |
| D. | 0.75 |
| Answer» C. 0.7 | |
| 82. |
The spacing of transverse reinforcement of column is decided by the following consideration. |
| A. | The least lateral dimension of the column |
| B. | Sixteen times the diameter of the smallest longitudinal reinforcing rods in the column |
| C. | Forty-eight times the diameter of transverse reinforcement |
| D. | All the above. |
| Answer» E. | |
| 83. |
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 |
| A. | 30 |
| B. | 35 |
| C. | 40 |
| D. | 45 |
| Answer» D. 45 | |
| 84. |
If the length of an intermediate span of a continuous slab is 5m, the length of the end span is kept |
| A. | 4.5 m |
| B. | 4.0 m |
| C. | 3.5 m |
| D. | 3.0 m |
| Answer» B. 4.0 m | |
| 85. |
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. |
| Answer» C. trapezoidal | |
| 86. |
An R.C.C beam of 25 cm width has a clear span of 5 metres and carries a U.D.L. of 2000 kg/m inclusive of its self weight. If the lever arm of the section is 45 cm., the beam is |
| A. | safe in shear |
| B. | is safe with stirrups |
| C. | is safe with stirrups and inclined members |
| D. | needs revision of the section. |
| Answer» B. is safe with stirrups | |
| 87. |
The maximum ratio of span to depth of a slab simply supported and spanning in two directions, is |
| A. | 25 |
| B. | 30 |
| C. | 35 |
| D. | 40 |
| Answer» D. 40 | |
| 88. |
Steel bars are generally connected together to get greater length than the standard length by providing |
| A. | strainght bar splice |
| B. | hooked splice |
| C. | dowel splice |
| D. | all the above |
| Answer» E. | |
| 89. |
A circular slab subjected to external loading, deflects to form a |
| A. | semi-hemisphere |
| B. | ellipsoid |
| C. | parabolloid |
| D. | none of these. |
| Answer» D. none of these. | |
| 90. |
A column is regarded as long column if the ratio of its effective length and lateral dimension, exceeds |
| A. | 10 |
| B. | 15 |
| C. | 20 |
| D. | 25 |
| Answer» C. 20 | |
| 91. |
In a slab, the pitch of the main reinforcement should not exceed its effective depth |
| A. | three times |
| B. | four times |
| C. | five times |
| D. | two times. |
| Answer» B. four times | |
| 92. |
The design of heel slab of a retaining wall, is based on the maximum bending moment due to: |
| A. | its own weight |
| B. | weight of the soil above it, |
| C. | load of the surcharge, if any |
| D. | upward soil reaction |
| Answer» E. | |
| 93. |
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 |
| Answer» D. 200 kg/cm2 | |
| 94. |
Design of R.C.C. cantilever beams, is based on the resultant force at |
| A. | fixed end |
| B. | free end |
| C. | mid span |
| D. | mid span and fixed support. |
| Answer» B. free end | |
| 95. |
The advantage of a concrete pile over a timber pile, is |
| A. | no decay due to termites |
| B. | no restriction on length |
| C. | higher bearing capacity |
| D. | not necessary to cut below the water mark |
| Answer» E. | |
| 96. |
For a number of columns constructed in a rcjw, the type of foundation provided, is |
| A. | footing |
| B. | raft |
| C. | strap |
| D. | strip |
| Answer» E. | |
| 97. |
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 |
| Answer» E. | |
| 98. |
The steel generally used in R.C.C. work, is |
| A. | stainless |
| B. | mildsteel |
| C. | high carbon steel |
| D. | high tension steel. |
| Answer» C. high carbon steel | |
| 99. |
The effective width of a column strip of a flat slab, is |
| A. | one-fourth the width of the panel |
| B. | half the width of the panel |
| C. | radius of the column |
| D. | diameter of the column |
| Answer» C. radius of the column | |
| 100. |
An R.C.C. beam not provided with shear reinforcement may develop cracks in its bottom inclined roughly to the horizontal at |
| A. | 25° |
| B. | 35° |
| C. | 45° |
| D. | 55° |
| Answer» D. 55¬∞ | |