MCQOPTIONS
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MCQOPTIONS
This section includes 298 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. |
In working stress design, permissible bond stress in the case of deformed bars is more than that in plain bars by |
| A. | 10 % |
| B. | 20 % |
| C. | 30 % |
| D. | 40 % |
| Answer» E. | |
| 52. |
For ensuring quality of concrete, use |
| A. | single sized aggregates |
| B. | two sized aggregate |
| C. | graded aggregates |
| D. | coarse aggregates |
| Answer» D. coarse aggregates | |
| 53. |
Permissible compressive strength of M 300 concrete grade is |
| A. | 100 kg/cm2 |
| B. | 150 kg/cm2 |
| C. | 200 kg/cm2 |
| D. | 300 kg/cm2 |
| Answer» E. | |
| 54. |
Strength of concrete increases with |
| A. | increase in water-cement ratio |
| B. | increase in fineness of cement |
| C. | decrease in curing time |
| D. | decrease in size of aggregate |
| Answer» C. decrease in curing time | |
| 55. |
M 150 grade of concrete approximates |
| A. | 1 : 3 : 6 mix |
| B. | 1 : 1 :2 mix |
| C. | 1 : 2 : 4 mix |
| D. | 1 : 1.5 : 3 mix |
| Answer» C. 1 : 2 : 4 mix | |
| 56. |
Minimum thickness of load bearing RCC wall should be |
| A. | 50 mm |
| B. | 100 mm |
| C. | 150 mm |
| D. | 200 mm |
| Answer» C. 150 mm | |
| 57. |
While designing an air entrained concrete |
| A. | water cement ratio is reduced |
| B. | proportion of aggregates is reduced |
| C. | an allowance for the entrained air is made |
| D. | all the above |
| Answer» E. | |
| 58. |
An aggregate is said to be flaky, if its least dimension is less than |
| A. | 2/3 mean dimension |
| B. | 3/4 mean dimension |
| C. | 3/5 mean dimension |
| D. | 5/8 mean dimension |
| Answer» D. 5/8 mean dimension | |
| 59. |
In a spherical dome subjected to concentrated load at crown or uniformly distributed load, the meridional force is always |
| A. | zero |
| B. | tensile |
| C. | compressive |
| D. | tensile or compressive |
| Answer» D. tensile or compressive | |
| 60. |
Ordinary concrete is not used for concrete grade |
| A. | m 100 |
| B. | m 150 |
| C. | m 250 |
| D. | m 400 |
| Answer» E. | |
| 61. |
Maximum distance between expansion joints in structures as per IS: 456 1978 is |
| A. | 20 m |
| B. | 30 m |
| C. | 45 m |
| D. | 60 m |
| Answer» D. 60 m | |
| 62. |
Construction joints are provided |
| A. | where b.m. and s.f. are small |
| B. | where the member is supported by other member |
| C. | at 18 m apart in huge structures |
| D. | all the above |
| Answer» E. | |
| 63. |
Air entrainment in the concrete increases |
| A. | workability |
| B. | strength |
| C. | the effects of temperature variations |
| D. | the unit weight |
| Answer» B. strength | |
| 64. |
The relation between modulus of rupture fcr, splitting strength fcs and direct tensile strength fcl is given by |
| A. | fcr - fcs = fcl |
| B. | fcr > fcs > fcl |
| C. | fcr < fcs < fcl |
| D. | fcs > fcr > fcl |
| Answer» C. fcr < fcs < fcl | |
| 65. |
Proper proportioning of concrete, ensures |
| A. | desired strength and workability |
| B. | desired durability |
| C. | water tightness of the structure |
| D. | all the above |
| Answer» E. | |
| 66. |
If the depth of actual neutral axis in a beam is more than the depth of critical neutral axis, then the beam is called |
| A. | balanced beam |
| B. | under-reinforced beam |
| C. | over-reinforced beam |
| D. | none of the above |
| Answer» D. none of the above | |
| 67. |
If X, Y and Z are the fineness modulli of coarse, fine and combined aggregates, the percentage (P) of fine aggregates to combined aggregates, is |
| A. | p = [(z - x)/(z - y)] × 100 |
| B. | p = [(x - z)/(z - y)] × 100 |
| C. | p = [(x - z)/(z + y)] × 100 |
| D. | p = [(z + x)/(z - y)] × 100 |
| Answer» C. p = [(x - z)/(z + y)] × 100 | |
| 68. |
If the storey height is equal to length of RCC wall, the percentage increase in strength is |
| A. | 0 |
| B. | 10 |
| C. | 20 |
| D. | 30 |
| Answer» C. 20 | |
| 69. |
Batching error means inaccuracy in the quantity of |
| A. | aggregates |
| B. | cement |
| C. | water |
| D. | all the above |
| Answer» E. | |
| 70. |
Curing a concrete for long period ensures better |
| A. | volume stability |
| B. | strength |
| C. | water resistance |
| D. | all the above |
| Answer» E. | |
| 71. |
In a pile of length , the points of suspension from ends for lifting it are located at |
| A. | 0.207 l |
| B. | 0.25 l |
| C. | 0.293 l |
| D. | 0.333 l |
| Answer» B. 0.25 l | |
| 72. |
To obtain cement dry powder, lime stones and shales or their slurry, is burnt in a rotary kiln at a temperature between |
| A. | 1100° and 1200°c |
| B. | 1200° and 1300°c |
| C. | 1300° and 1400°c |
| D. | 1400° and 1500°c |
| Answer» E. | |
| 73. |
Strength of concrete with passage of time |
| A. | increases |
| B. | decreases |
| C. | fluctuates |
| D. | remains constant |
| Answer» B. decreases | |
| 74. |
For quality control of Portland cement, the test essentially done is |
| A. | setting time |
| B. | tensile strength |
| C. | consistency |
| D. | all the above |
| Answer» E. | |
| 75. |
Approximate value of shrinkage strain in concrete, is |
| A. | 0.003 |
| B. | 0.0003 |
| C. | 0.00003 |
| D. | 0.03 |
| Answer» C. 0.00003 | |
| 76. |
In order to obtain the best workability of concrete, the preferred shape of aggregate is |
| A. | rounded |
| B. | elongated |
| C. | angular |
| D. | all of the above |
| Answer» B. elongated | |
| 77. |
An aggregate which passes through 25 mm I.S. sieve and is retained on 20 mm sieve, is said to be flaky if its least dimension is less than |
| A. | 22.5 mm |
| B. | 18.5 mm |
| C. | 16.5 mm |
| D. | 13.5 mm |
| Answer» E. | |
| 78. |
Hydration of cement is due to chemical action of water with |
| A. | tricalcium silicate and dicalcium silicate |
| B. | dicalcium silicate and tricalcium aluminate |
| C. | tricalcium aluminate and tricalcium alumino ferrite |
| D. | all the above |
| Answer» E. | |
| 79. |
Concrete is unsuitable for compaction by a vibrator if it is |
| A. | dry |
| B. | earth moist |
| C. | semi-plastic |
| D. | plastic |
| Answer» E. | |
| 80. |
The increased cohesiveness of concrete, makes it |
| A. | less liable to segregation |
| B. | more liable to segregation |
| C. | more liable to bleeding |
| D. | more liable for surface scaling in frosty weather |
| Answer» B. more liable to segregation | |
| 81. |
Maximum quantity of water needed per 50 kg of cement for M 15 grade of concrete is |
| A. | 28 liters |
| B. | 30 liters |
| C. | 32 liters |
| D. | 34 liters |
| Answer» D. 34 liters | |
| 82. |
If fineness modulus of sand is 2.5, it is graded as |
| A. | very fine sand |
| B. | fine sand |
| C. | medium sand |
| D. | coarse sand |
| Answer» C. medium sand | |
| 83. |
A continuous beam is deemed to be a deep beam when the ratio of effective span to overall depth (1/D) is less than |
| A. | 1.5 |
| B. | 2.0 |
| C. | 2.5 |
| D. | 3.0 |
| Answer» D. 3.0 | |
| 84. |
Pozzolanic properties exist in |
| A. | shales |
| B. | fly ash |
| C. | pumicite |
| D. | all the above |
| Answer» E. | |
| 85. |
The produce impermeable concrete |
| A. | thorough mixing of concrete is required |
| B. | proper compaction of concrete is required |
| C. | proper curing of concrete is required |
| D. | all the above |
| Answer» E. | |
| 86. |
The process of hardening the concrete by keeping its surface moist is known |
| A. | placing |
| B. | wetting |
| C. | curing |
| D. | compacting |
| Answer» D. compacting | |
| 87. |
For the construction of the retaining structures, the type of concrete mix to be used, is |
| A. | 1 : 3 : 6 |
| B. | 1 : 2 : 4 |
| C. | 1 : 1½ : 3 |
| D. | 1 : 4 : 8 |
| Answer» D. 1 : 4 : 8 | |
| 88. |
For a good concrete |
| A. | aggregates should be hard and durable |
| B. | water should be free from organic materials |
| C. | cement should be sufficient to produce the required strength |
| D. | all the above |
| Answer» E. | |
| 89. |
For preparing a test-specimen, it is necessary |
| A. | to mix cement and fine aggregate by dry hand |
| B. | to mix coarse aggregates |
| C. | to mix water to the cement, fine aggregates and coarse aggregates |
| D. | all the above |
| Answer» E. | |
| 90. |
The cement becomes useless if its absorbed moisture content exceeds |
| A. | 1 % |
| B. | 2 % |
| C. | 3 % |
| D. | 5 % |
| Answer» E. | |
| 91. |
In reinforced concrete footing on soil, the minimum thickness at edge should not be less than |
| A. | 100 mm |
| B. | 150 mm |
| C. | 200 mm |
| D. | 250 mm |
| Answer» C. 200 mm | |
| 92. |
The grade of concrete M 150 means that compressive strength of a 15 cm cube after 28 days, is |
| A. | 100 kg/cm2 |
| B. | 150 kg/cm2 |
| C. | 200 kg/cm2 |
| D. | 250 kg/cm2 |
| Answer» C. 200 kg/cm2 | |
| 93. |
Gypsum is added for |
| A. | colour |
| B. | strength |
| C. | controlling setting time |
| D. | none of these |
| Answer» D. none of these | |
| 94. |
Modulus of elasticity of steel as per IS: 4561978 shall be taken as |
| A. | 20 kn/cm² |
| B. | 200 kn/cm² |
| C. | 200 kn/mm² |
| D. | 2 × 106 n/cm² |
| Answer» D. 2 × 106 n/cm² | |
| 95. |
According to IS : 382-1963, a good aggregate should be |
| A. | chemically inert |
| B. | sufficiently strong |
| C. | hard and durable |
| D. | all the above |
| Answer» E. | |
| 96. |
The compressive strength of 100 mm cube as compared to 150 mm cube is always |
| A. | less |
| B. | more |
| C. | equal |
| D. | none of the above |
| Answer» C. equal | |
| 97. |
The void ratio of |
| A. | single size coarse aggregate is roughly 0.45 |
| B. | graded coarse aggregate is roughly 0.040 |
| C. | fine aggregate is roughly 0.45 |
| D. | all the above |
| Answer» E. | |
| 98. |
The diameter of the Vicat plunger is 10 mm and its length varies from |
| A. | 20 mm to 30 mm |
| B. | 30 mm to 40 mm |
| C. | 40 mm to 50 mm |
| D. | 50 mm to 60 mm |
| Answer» D. 50 mm to 60 mm | |
| 99. |
Cube strength of controlled concrete to be used for pre-tensioned and post-tensioned work respectively should not be less than |
| A. | 35 mpa and 42 mpa |
| B. | 42 mpa and 35 mpa |
| C. | 42 mpa and 53 mpa |
| D. | 53 mpa and 42 mpa |
| Answer» C. 42 mpa and 53 mpa | |
| 100. |
If the slump of a concrete mix is 60 mm, its workability is |
| A. | very low |
| B. | low |
| C. | medium |
| D. | high |
| Answer» D. high | |