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MCQOPTIONS
This section includes 122 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 size of panel in a flat slab is 6 m × 6 m, then as per Indian Standard Code, the widths ofcolumn strip and middle strip are |
| A. | 3.0 m and 1.5 m |
| B. | 1.5 m and 3.0 m |
| C. | 3.0 m and 3.0 m |
| D. | 1.5 m and 1.5 m |
| Answer» D. 1.5 m and 1.5 m | |
| 52. |
According to IS: 4561978, the maximum reinforcement in a column is |
| A. | 2 % |
| B. | 4 % |
| C. | 6 % |
| D. | 8 % |
| Answer» D. 8 % | |
| 53. |
The preliminary test is repeated if the difference of compressive strength of three test specimens,exceeds |
| A. | 5 kg/cm2 |
| B. | 8 kg/cm2 |
| C. | 10 kg/cm2 |
| D. | 15 kg/cm2 |
| Answer» E. | |
| 54. |
The following proportion of the ingredients of concrete mix, is not in conformation to arbitrarymethod of proportioning |
| A. | 1 : 1 : 2 |
| B. | 1 : 2 : 4 |
| C. | 1 : 3 : 6 |
| D. | 1 : 4 : 10 |
| Answer» E. | |
| 55. |
As compared to ordinary Portland cement, use of pozzolana cement |
| A. | reduces workability |
| B. | increases bleeding |
| C. | increases shrinkage |
| D. | increases strength |
| Answer» D. increases strength | |
| 56. |
Which of the following losses of pre-stress occurs only in pre-tensioning and not in posttensioning? |
| A. | elastic shortening of concrete |
| B. | shrinkage of concrete |
| C. | creep of concrete |
| D. | loss due to friction |
| Answer» B. shrinkage of concrete | |
| 57. |
Pre-stress loss due to friction occurs |
| A. | only in post-tensioned beams |
| B. | only in pre-tensioned beams |
| C. | in both post-tensioned and pre-tensioned beams |
| D. | none of the above |
| Answer» B. only in pre-tensioned beams | |
| 58. |
If the foundations of all the columns of a structure are designed on the total live and dead loadbasis, then |
| A. | there will be no settlement of columns |
| B. | there will be no differential settlement |
| C. | the settlement of exterior columns will be more than interior columns |
| D. | the settlement of interior columns will be more than exterior columns |
| Answer» D. the settlement of interior columns will be more than exterior columns | |
| 59. |
If aggregates completely pass through a sieve of size 75 mm and are retained on a sieve of size 60mm, the particular aggregate will be flaky if its minimum dimension is less than |
| A. | 20.5 mm |
| B. | 30.5 mm |
| C. | 40.5 mm |
| D. | 50.5 mm |
| Answer» D. 50.5 mm | |
| 60. |
If the depth of moist sand in a cylinder is 15 cm and the depth of the sand when fully inundatedwith water is 12 cm, the bulking of the moist sand, is |
| A. | 10 % |
| B. | 12 % |
| C. | 15 % |
| D. | 25 % |
| Answer» E. | |
| 61. |
C.R.R.I. charts are used to obtain a relationship between strength of concrete and |
| A. | water cement ratio |
| B. | workability |
| C. | grading of aggregate |
| D. | fineness modulus |
| Answer» B. workability | |
| 62. |
Most common method of pre-stressing used for factory production is |
| A. | long line method |
| B. | freyssinet system |
| C. | magnel-blaton system |
| D. | lee-macall system |
| Answer» B. freyssinet system | |
| 63. |
If a grading curve is horizontal between the portions of 20 mm I.S. Sieve and 4.75 mm I.S. Sieve,the graded aggregates do not contain |
| A. | 20 mm particles |
| B. | 10 mm particles |
| C. | 4.75 mm particles |
| D. | all the above |
| Answer» E. | |
| 64. |
The limits of percentage p of the longitudinal reinforcement in a column is given by |
| A. | 0.15% to 2% |
| B. | 0.8% to 4% |
| C. | 0.8% to 6% |
| D. | 0.8% to 8% |
| Answer» D. 0.8% to 8% | |
| 65. |
According to IS: 4561978, the flexural strength of concrete is |
| A. | directly proportional to compressive strength |
| B. | inversely proportional to compressive strength |
| C. | directly proportional to square root of compressive strength |
| D. | inversely proportional to square root of compressive strength |
| Answer» D. inversely proportional to square root of compressive strength | |
| 66. |
The main reason for providing number of reinforcing bars at a support in a simply supported beamis to resist in that zone |
| A. | compressive stress |
| B. | shear stress |
| C. | bond stress |
| D. | tensile stress |
| Answer» D. tensile stress | |
| 67. |
For a longitudinal reinforcing bar in a column, the minimum cover shall neither be less than thediameter of bar nor less than |
| A. | 15 mm |
| B. | 25 mm |
| C. | 30 mm |
| D. | 40 mm |
| Answer» E. | |
| 68. |
The 28 days cube strength of mass concrete using aggregates of maximum size 5 cm for gravitydams should be |
| A. | between 150 to 300 kg/cm2 |
| B. | between 350 to 600 kg/cm2 |
| C. | between 150 to 500 kg/cm2 |
| D. | below 200 kg/cm2 |
| Answer» E. | |
| 69. |
The type of aggregates not suitable for high strength concrete and for pavements subjected totension, is |
| A. | rounded aggregate |
| B. | irregular aggregate |
| C. | angular aggregate |
| D. | flaky aggregate |
| Answer» B. irregular aggregate | |
| 70. |
For walls, columns and vertical faces of all structural members, the form work is generallyremoved after |
| A. | 24 to 48 hours |
| B. | 3 days |
| C. | 7 days |
| D. | 14 days |
| Answer» B. 3 days | |
| 71. |
The property of fresh concrete, in which the water in the mix tends to rise to the surface whileplacing and compacting, is called |
| A. | segregation |
| B. | bleeding |
| C. | bulking |
| D. | creep |
| Answer» C. bulking | |
| 72. |
If the effective plan area of a warehouse is 54 sq. m, and maximum height of piles permitted is 270cm, the number of cement bags to be stored, is |
| A. | 2000 bags |
| B. | 2200 bags |
| C. | 2400 bags |
| D. | 2700 bags |
| Answer» E. | |
| 73. |
According to ISI recommendations, the maximum depth of stress block for balanced section of abeam of effective depth d is |
| A. | 0.43 d |
| B. | 0.55 d |
| C. | 0.68 d |
| D. | 0.85 d |
| Answer» B. 0.55 d | |
| 74. |
The aggregate containing moisture in pores and having its surface dry, is known as |
| A. | moist aggregates |
| B. | very dry aggregates |
| C. | dry aggregates |
| D. | saturated surface dry aggregate |
| Answer» E. | |
| 75. |
The dimensions of a 35 litre forma for measuring aggregates by volume, are: |
| A. | length 30 cm, breadth 25 cm, height 30 cm |
| B. | length 39 cm, breadth 25 cm, height 32 cm |
| C. | length 27 cm, breadth 27 cm, height 48 cm |
| D. | length 220 cm, breadth 25 cm, height 40 cm |
| Answer» D. length 220 cm, breadth 25 cm, height 40 cm | |
| 76. |
The cement whose strength is a little lower than the ordinary cement during the first threemonths but attains afterwards the same strength, is known as |
| A. | low-heat portland cement |
| B. | rapid hardening portland cement |
| C. | portland blast slag cement |
| D. | portland pozzolana cement |
| Answer» B. rapid hardening portland cement | |
| 77. |
Which of the following R.C. retaining walls is suitable for heights beyond 6 m? |
| A. | l-shaped wall |
| B. | t-shaped wall |
| C. | counterfort type |
| D. | all of the above |
| Answer» D. all of the above | |
| 78. |
Under normal conditions using an ordinary cement, the period of removal of the form work, is: |
| A. | 7 days for beam soffits |
| B. | 14 days for bottom slabs of spans 4.6 m and more |
| C. | 21 days for bottom beams over 6 m spans |
| D. | all the above |
| Answer» E. | |
| 79. |
In slump test, each layer of concrete is compacted by a steel rod 60 cm long and of 16 mmdiameter for |
| A. | 20 times |
| B. | 25 times |
| C. | 30 times |
| D. | 50 times |
| Answer» C. 30 times | |
| 80. |
If the various concrete ingredients i.e. cement, sand and aggregates are in the ratio of 1:3:6, thegrade of concrete, is |
| A. | m 100 |
| B. | m 150 |
| C. | m 200 |
| D. | m 250 |
| Answer» B. m 150 | |
| 81. |
For a slab supported on its four edges with corners held down and loaded uniformly, the Marcuscorrection factor to the moments obtained by Grashoff Rankine's theory |
| A. | is always less than 1 |
| B. | is always greater than 1 |
| C. | can be more than 1 |
| D. | can be less than 1 |
| Answer» B. is always greater than 1 | |
| 82. |
For concreting of heavily reinforced sections without vibration, the workability of concreteexpressed as compacting factor should be |
| A. | 0.75 - 0.80 |
| B. | 0.80 - 0.85 |
| C. | 0.85 - 0.92 |
| D. | above 0.92 |
| Answer» E. | |
| 83. |
According to IS: 4561978, the column or the strut is the member whose effective length is greaterthan |
| A. | the least lateral dimension |
| B. | 2 times the least lateral dimension |
| C. | 3 times the least lateral dimension |
| D. | 4 times the least lateral dimension |
| Answer» D. 4 times the least lateral dimension | |
| 84. |
To hydrate 500kg of cement full water needed, is |
| A. | 100 kg |
| B. | 110 kg |
| C. | 120 kg |
| D. | 130 kg |
| Answer» E. | |
| 85. |
The load carrying capacity of a helically reinforced column as compared to that of a tied column is about |
| A. | 5 % less |
| B. | 10 % less |
| C. | 5 % more |
| D. | 10 % more |
| Answer» D. 10 % more | |
| 86. |
For the construction of cement concrete dams, the maximum permissible size of the aggregates, is |
| A. | 40 mm |
| B. | 50 mm |
| C. | 60 mm |
| D. | 70 mm |
| Answer» B. 50 mm | |
| 87. |
The slab is designed as one way if the ratio of long span to short span is |
| A. | Less than 1 |
| B. | Between 1 and 1.5 |
| C. | Between 1.5 and 2 |
| D. | Greater than 2 |
| Answer» E. | |
| 88. |
Pick up the incorrect statement from the following. For performing compressive strength test of cement |
| A. | Cement and standard sand mortar are used in the ratio of 1 : 3 |
| B. | Water is added at the rate of (P/4) + 3.0 percentage of water where P is the percentage of water for standard consistency |
| C. | A cube mould of 10 cm × 10 cm × 10 cm is used |
| D. | The prepared moulds are kept in a atmosphere of 50% relative humidity |
| Answer» B. Water is added at the rate of (P/4) + 3.0 percentage of water where P is the percentage of water for standard consistency | |
| 89. |
The individual variation between test strength of sample should not be more than |
| A. | ±5 % of average |
| B. | ± 10 % of average |
| C. | ± 15 % of average |
| D. | ±20 % of average |
| Answer» D. ±20 % of average | |
| 90. |
In slump test, each layer of concrete is compacted by a steel rod 60 cm long and of 16 mm diameter for |
| A. | 20 times |
| B. | 25 times |
| C. | 30 times |
| D. | 50 times |
| Answer» C. 30 times | |
| 91. |
Allowable shear strength of concrete, depends upon |
| A. | Shear strength |
| B. | Tensile strength |
| C. | Compressive strength |
| D. | None of these |
| Answer» B. Tensile strength | |
| 92. |
For a reinforced concrete section, the shape of shear stress diagram is |
| A. | Wholly parabolic |
| B. | Wholly rectangular |
| C. | Parabolic above neutral axis and rectangular below neutral axis |
| D. | Rectangular above neutral axis and parabolic below neutral axis |
| Answer» D. Rectangular above neutral axis and parabolic below neutral axis | |
| 93. |
Admixtures which cause early setting and hardening of concrete are called |
| A. | Workability admixtures |
| B. | Accelerators |
| C. | Retarders |
| D. | Air entraining agents |
| Answer» C. Retarders | |
| 94. |
If the various concrete ingredients i.e. cement, sand and aggregates are in the ratio of 1:3:6, the grade of concrete, is |
| A. | M 100 |
| B. | M 150 |
| C. | M 200 |
| D. | M 250 |
| Answer» B. M 150 | |
| 95. |
Tricalcium aluminate (C3A) |
| A. | Reacts fast with water |
| B. | Generates less heat of hydration |
| C. | Causes initial setting and early strength of cement |
| D. | Does not contribute to develop ultimate strength |
| Answer» C. Causes initial setting and early strength of cement | |
| 96. |
To determine the modulus of rupture, the size of test specimen used is |
| A. | 150 × 150 × 500 mm |
| B. | 100 × 100 × 700 mm |
| C. | 150 × 150 × 700 mm |
| D. | 100 × 100 × 500 mm |
| Answer» D. 100 × 100 × 500 mm | |
| 97. |
Concrete gains strength due to |
| A. | Chemical reaction of cement with sand and coarse aggregates |
| B. | Evaporation of water from concrete |
| C. | Hydration of cement |
| D. | All the above |
| Answer» D. All the above | |
| 98. |
Which of the following has high tensile strength? |
| A. | Plain hot rolled wires |
| B. | Cold drawn wires |
| C. | Heat treated rolled wires |
| D. | All have same tensile strength |
| Answer» C. Heat treated rolled wires | |
| 99. |
The main object of compaction of concrete, is: |
| A. | To eliminate air holes |
| B. | To achieve maximum density |
| C. | To provide intimate contact between the concrete and embedded materials |
| D. | All the above |
| Answer» E. | |
| 100. |
In symmetrically reinforced sections, shrinkage stresses in concrete and steel are respectively |
| A. | Compressive and tensile |
| B. | Tensile and compressive |
| C. | Both compressive |
| D. | Both tensile |
| Answer» C. Both compressive | |