MCQOPTIONS
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MCQOPTIONS
This section includes 185 Mcqs, each offering curated multiple-choice questions to sharpen your Civil Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
and are the weights of a cylinder containing partially compacted and fully compacted concrete. If the compaction factor is 0.95, the workability of concrete is |
| A. | extremely low |
| B. | very low |
| C. | low |
| D. | high |
| E. | none of these. |
| Answer» E. none of these. | |
| 2. |
If the average compressive strength is 4000 kg/cm and standard deviation is 500, the co-efficient of variation is |
| A. | 10% |
| B. | 12.5% |
| C. | 15% |
| D. | 18.5 % |
| E. | 20% |
| Answer» C. 15% | |
| 3. |
Di-calcium silicate (CS) |
| A. | hydrates rapidly |
| B. | generates less heat of hydration |
| C. | hardens rapidly |
| D. | provides less ultimate strength to cement |
| E. | has less resistance to sulphate attack. |
| Answer» C. hardens rapidly | |
| 4. |
Density of light weight aggregate concrete is about .. kg/m3 . |
| A. | 3000 |
| B. | 1500 |
| C. | 1200 |
| D. | 1400 |
| Answer» D. 1400 | |
| 5. |
Total .. % of water by weight of water by weight of cement is required for complete hydration. |
| A. | 40 |
| B. | 38 |
| C. | 42 |
| D. | 50 |
| Answer» C. 42 | |
| 6. |
____ Cement is used for formwork that can be removed earlier and reused in other areas which save the cost of formwork. |
| A. | Rapid Hardening Cement |
| B. | Colored Cement |
| C. | High Alumina Cement |
| D. | Low Heat Cement |
| Answer» B. Colored Cement | |
| 7. |
Which cement is used for works economic where considerations is predominant? Reservoirs, retaining walls, swimming pools, dams, bridges, piers etc. |
| A. | Waterproof Portland Cement |
| B. | Colored Cement |
| C. | High Alumina Cement |
| D. | Blast Furnace Slag Cement |
| Answer» E. | |
| 8. |
Which cement is used for the construction of water-retaining structure like tanks, reservoirs, retaining walls, swimming pools, dams, bridges, piers etc? |
| A. | Waterproof Portland cement |
| B. | Colored Cement |
| C. | High Alumina Cement |
| D. | Low Heat Cement |
| Answer» B. Colored Cement | |
| 9. |
Shrinkage is the reduction in the volume of a fresh hardened concrete exposed to ambient temp and humidity. |
| A. | True |
| B. | False |
| C. | none |
| D. | all |
| Answer» B. False | |
| 10. |
Reduction in the quantity of mixing water which is possible by the use of plasticizers and admixture varies from |
| A. | 1% to 5% |
| B. | 5% to 15% |
| C. | 15% to 25% |
| D. | 25% to 35% |
| Answer» C. 15% to 25% | |
| 11. |
Which of the following types of concrete mixture is most commonly used in precast concrete factories? |
| A. | truck mounted mixture |
| B. | pan type mixer |
| C. | dual drum mixture |
| D. | tilting drum mixture |
| Answer» C. dual drum mixture | |
| 12. |
If the actual grading curve is steeper than the specified grading curve, it indicates an excess of ..particle size. |
| A. | sand |
| B. | coarser |
| C. | medium |
| D. | cement |
| Answer» D. cement | |
| 13. |
The process of mixing, transporting, placing and compacting concrete should not take more than . min any case. |
| A. | 90 |
| B. | 80 |
| C. | 70 |
| D. | 60 |
| Answer» B. 80 | |
| 14. |
Compacting factor test should be made for concrete with maximum size of aggregate not exceeding 40 mm. |
| A. | True |
| B. | False |
| C. | none |
| D. | all |
| Answer» B. False | |
| 15. |
In very low category of degree of workability determination by compacting factor will be more appropriate. |
| A. | True |
| B. | False |
| C. | none |
| D. | all |
| Answer» B. False | |
| 16. |
ISI has specified full strength of concrete after |
| A. | 7 days |
| B. | 14 days |
| C. | 21 days |
| D. | 28 days |
| E. | none of these. |
| Answer» F. | |
| 17. |
'Ware house pack' of cement means |
| A. | full capacity of the ware house |
| B. | pressure exertion of the bags of upper layers |
| C. | pressure compaction of the bags on lower layers |
| D. | packing the ware house |
| E. | none of these. |
| Answer» D. packing the ware house | |
| 18. |
In the method of voids for determination of the quantity of cement paste, it is assumed that |
| A. | Voids in coarse aggregates are filled by fine aggregates |
| B. | Voids in fine aggregates are filled by the cement paste |
| C. | Volume of fine aggregates is equal to total voids in coarse aggregates plus 10% extra |
| D. | Volume of cement paste required is equal to total volume of voids in fine aggregates plus 15% extra |
| E. | All the above. |
| Answer» F. | |
| 19. |
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. | [A]. |
| B. | [B]. |
| C. | [C]. |
| D. | [D]. |
| E. | [E]. |
| Answer» C. [C]. | |
| 20. |
Water required per bag of cement, is |
| A. | 7 kg |
| B. | 14 kg |
| C. | 21 kg |
| D. | 28 kg |
| E. | 35 kg |
| Answer» F. | |
| 21. |
Di-calcium silicate (C2S) |
| A. | hydrates rapidly |
| B. | generates less heat of hydration |
| C. | hardens rapidly |
| D. | provides less ultimate strength to cement |
| E. | has less resistance to sulphate attack. |
| Answer» C. hardens rapidly | |
| 22. |
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. | properly graded and non-porous aggregates are requied |
| E. | all the above. |
| Answer» F. | |
| 23. |
For a concrete mix 1:3:6 and water cement ratio 0.6 both by weight, the quantity of water required per bag, is |
| A. | Constructionjoints are generally provided in positions subjected to least shear force |
| B. | All the above. |
| C. | 10 kg |
| D. | 12 kg |
| Answer» D. 12 kg | |
| 24. |
The entrained air in concrete |
| A. | 10 kg |
| B. | 12 kg |
| C. | 14 kg |
| D. | 15 kg. |
| Answer» B. 12 kg | |
| 25. |
Pick up the incorrect statement applicable to the field test of good cement. |
| A. | Water lubricates the mixture of gravel, sand and cement |
| B. | Only a small quantity of water is required for hydration of cement |
| C. | Strength of concrete structure largely depends upon its workability |
| D. | All the above. |
| Answer» E. | |
| 26. |
The ratio of the length to breadth of a wooden float, is |
| A. | more liable to segregation |
| B. | more liable to bleeding |
| C. | more liable for surface scaling in frosty weather |
| D. | none of these. |
| Answer» E. | |
| 27. |
Ordinary concrete is not used for concrete grade |
| A. | less cement in the concrete |
| B. | proper concrete mix |
| C. | presaturated aggregates |
| D. | all the above. |
| Answer» E. | |
| 28. |
The rock which is not calcareous, is : |
| A. | Slump test |
| B. | Minimum void method |
| C. | Talbot Richard test. |
| D. | lime stone |
| Answer» E. | |
| 29. |
The aggregate impact value of the aggregate used in |
| A. | 20°C |
| B. | 23°C |
| C. | 27 ± 2°C |
| D. | building concrete is less than 45 |
| Answer» E. | |
| 30. |
Pick up the incorrect statement from the following. While performing preliminary test on concrete |
| A. | 60 minutes |
| B. | 75 minutes |
| C. | 90 minutes. |
| D. | proportions of the material and water should be the same as to be used at the work site |
| Answer» E. | |
| 31. |
The minimum percentage of chemical ingredient of cement is that of |
| A. | least weight for the given cement and aggregates |
| B. | greatest weight for the given cement and aggregates |
| C. | none of these. |
| D. | magnesium oxide |
| Answer» B. greatest weight for the given cement and aggregates | |
| 32. |
To hydrate 500kg of cement full water needed, is |
| A. | Large size aggregates increase the workability due to lesser surface area |
| B. | The slump of the concrete mix decreases due to an increase in temperature |
| C. | All the above. |
| D. | 100 kg |
| Answer» E. | |
| 33. |
Saw dust can be rendered chemically inert by boiling it in water containing |
| A. | ferrous sulphate |
| B. | potassium chloride |
| C. | ammonia |
| D. | nitric acid |
| Answer» B. potassium chloride | |
| 34. |
The high strength of rapid hardening cement at early stage, is due to its |
| A. | lime |
| B. | concrete. |
| C. | finer grinding |
| D. | burning at high temperature |
| Answer» D. burning at high temperature | |
| 35. |
If 20 kg of coarse aggregate is sieved through 80 mm, 40 mm, 20 mm, 10 mm, 4.75 mm, 2.36 mm, 1.18 mm, 600 micron, 300 micron and 150 micron standard sieves and the weights retained are 0 kg, 2 kg, 8 kg, 6 kg, 4 kg respectively, the fineness modulus of the aggregate, is |
| A. | lime stone |
| B. | graphite. |
| C. | 7.3 |
| D. | 7.35 |
| Answer» D. 7.35 | |
| 36. |
Workability of concrete is measured by |
| A. | 1 : 2 : 4 mix |
| B. | 1 : 1.5 : 3 mix |
| C. | none of these. |
| D. | Vicat apparatus test |
| Answer» C. none of these. | |
| 37. |
The light weight aggregates are obtained from |
| A. | sedimentary rocks |
| B. | metamorphic rocks |
| C. | igneous rocks |
| D. | volcanic source. |
| Answer» E. | |
| 38. |
Pozzolana cement is used with confidence for construction of |
| A. | impact value. |
| B. | dams |
| C. | massive foundations |
| D. | abutments |
| Answer» E. | |
| 39. |
The following proportion of the ingredients of concrete mix, is not in conformation to arbitrary method of proportioning |
| A. | 4/5th of mean dimension |
| B. | none of these. |
| C. | 0.042384259259259 |
| D. | 0.043101851851852 |
| Answer» E. | |
| 40. |
Grading of sand causes great variation in |
| A. | do not carry reinforcement across them |
| B. | all the above. |
| C. | workability of concrete |
| D. | strength of concrete |
| Answer» E. | |
| 41. |
A flaky aggregate is said to be elongated if its length is |
| A. | equal to the mean size |
| B. | twice the mean size |
| C. | thrice the mean size |
| D. | four times the mean size |
| Answer» C. thrice the mean size | |
| 42. |
For the construction of the retaining structures, the type of concrete mix to be used, is |
| A. | None of these. |
| B. | 0.043819444444444 |
| C. | 0.043101851851852 |
| D. | 1 : : 3 |
| Answer» D. 1 : : 3 | |
| 43. |
Joints in concrete structures, are provided |
| A. | Both (c) and (d). |
| B. | to reduce the tensile stresses likely to be developed due to evaporation of water |
| C. | to minimise the change in the dimensions of the slab |
| D. | to minimise the necessary cracking |
| Answer» E. | |
| 44. |
The commercial name of white and coloured cement in India, is |
| A. | none of these. |
| B. | colocrete |
| C. | rainbow cement |
| D. | silvicrete |
| Answer» E. | |
| 45. |
For batching 1:3:6 concrete mix by volume, the ingredients required per bag of 50 kg cement, are: |
| A. | 0.7 |
| B. | 70 litres of sand and 120 litres of aggregates |
| C. | 70 kg of sand and 140 litres of aggregates |
| D. | 105 litres of sand and 140 litres of aggregates |
| Answer» E. | |
| 46. |
According to Water-Cement Ratio Law, the strength of workable plastic concrete |
| A. | depends upon the amount of water used in the mix |
| B. | does not depend upon the quality of cement mixed with aggregates |
| C. | does not depend upon the quanity of cement mixed with aggregates |
| D. | all the above. |
| Answer» E. | |
| 47. |
The process of proper and accurate measurement of concrete ingredients for uniformity of proportion, is known |
| A. | 12 mm |
| B. | grading |
| C. | curing |
| D. | mixing |
| Answer» E. | |
| 48. |
For ensuring quality of concrete, use |
| A. | none of these. |
| B. | single sized aggegates |
| C. | two sized aggregate |
| D. | graded aggregates |
| Answer» D. graded aggregates | |
| 49. |
An ideal ware house, is provided |
| A. | water proof masonry walls |
| B. | water proof roof |
| C. | few windows which remain generally closed |
| D. | 15 cm thick concrete floor laid on a dry course of soling |
| Answer» E. | |
| 50. |
The type of aggregates not suitable for high strength concrete and for pavements subjected to tension, is |
| A. | rounded aggregate |
| B. | irregular aggregate |
| C. | angular aggregate |
| D. | flaky aggregate |
| Answer» B. irregular aggregate | |