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.
| 1. |
The top diameter, bottom diameter and the height of a slump mould are: |
| A. | 10 cm, 20 cm, 30 cm |
| B. | 10 cm, 30 cm, 20 cm |
| C. | 20 cm, 10 cm, 30 cm |
| D. | 20 cm, 30 cm, 10 cm |
| Answer» B. 10 cm, 30 cm, 20 cm | |
| 2. |
An ordinary Portland cement when tested for its fineness, should not leave any residue on I.S. sieve No. 9, more than |
| A. | 5 % |
| B. | 10 % |
| C. | 15 % |
| D. | 20 % |
| Answer» C. 15 % | |
| 3. |
If the effective working time is 7 hours and per batch time of concrete is 3 minutes, the output of a concrete mixer of 150 litre capacity, is |
| A. | 15,900 litres |
| B. | 16,900 litres |
| C. | 17,900 litres |
| D. | 18,900 litres |
| Answer» E. | |
| 4. |
Slump test of concrete is a measure of its |
| A. | consistency |
| B. | compressive strength |
| C. | tensile strength |
| D. | impact value |
| Answer» B. compressive strength | |
| 5. |
Segregation is responsible for |
| A. | honey-combed concrete |
| B. | porous layers in concrete |
| C. | surface scaling in concrete |
| D. | all the above |
| Answer» E. | |
| 6. |
The compaction of concrete, improves |
| A. | density |
| B. | strength |
| C. | durability |
| D. | all the above |
| Answer» E. | |
| 7. |
The grade of concrete not recommended by I.S. : 456, is |
| A. | m 100 |
| B. | m 200 |
| C. | m 300 |
| D. | m 500 |
| Answer» E. | |
| 8. |
Percentage of pozzolanic material containing clay upto 80% used for the manufacture of pozzolana cement, is |
| A. | 30 % |
| B. | 40 % |
| C. | 50 % |
| D. | 60 % |
| Answer» B. 40 % | |
| 9. |
Vicat's apparatus is used for |
| A. | fineness test |
| B. | consistency test |
| C. | setting time test |
| D. | soundness test |
| Answer» C. setting time test | |
| 10. |
The ratio of the length to breadth of a wooden float, is |
| A. | 4.5 |
| B. | 5.5 |
| C. | 6.5 |
| D. | 7.5 |
| Answer» E. | |
| 11. |
Proper batching ensures |
| A. | economy |
| B. | durability |
| C. | workability |
| D. | all the above |
| Answer» E. | |
| 12. |
The factor which affects workability, is |
| A. | water content and its temperature |
| B. | shape and size of the aggregates |
| C. | air entraining agents |
| D. | all the above |
| Answer» E. | |
| 13. |
For concreting tunnel linings, transportation of concrete is done by |
| A. | pans |
| B. | wheel borrows |
| C. | containers |
| D. | pumps |
| Answer» E. | |
| 14. |
The bulk density of aggregates, is generally expressed as |
| A. | tonnes/cubic metre |
| B. | kg/cubic metre |
| C. | kg/litre |
| D. | g/cm3 |
| Answer» D. g/cm3 | |
| 15. |
The datum temperature for maturity by Plowman, is |
| A. | 23°c |
| B. | 0° |
| C. | - 5.6°c |
| D. | - 11.7°c |
| Answer» E. | |
| 16. |
Curing |
| A. | reduces the shrinkage of concrete |
| B. | preserves the properties of concrete |
| C. | prevents the loss of water by evaporation |
| D. | all of the above |
| Answer» E. | |
| 17. |
Transport of concrete by pumps, is done for a distance of |
| A. | 100 m |
| B. | 200 m |
| C. | 300 m |
| D. | 400 m |
| Answer» E. | |
| 18. |
The final operation of finishing floors, is known as |
| A. | screeding |
| B. | floating |
| C. | trowelling |
| D. | finishing |
| Answer» D. finishing | |
| 19. |
For the construction of R.C.C. slabs, columns, beams, walls, etc. the grade of concrete mix used, is |
| A. | 1 : 3 : 6 |
| B. | 1 : 1½ : 3 |
| C. | 1 : 2 : 4 |
| D. | 1 : 1 : 2 |
| Answer» D. 1 : 1 : 2 | |
| 20. |
Joints in concrete structures, are provided |
| A. | to reduce the tensile stresses likely to be developed due to evaporation of water |
| B. | to minimise the change in the dimensions of the slab |
| C. | to minimise the necessary cracking |
| D. | all the above |
| Answer» E. | |
| 21. |
The ratio of various ingredients (cement, sand, aggregates) in concrete of grade M 200, is |
| A. | 1 : 2 : 4 |
| B. | 1 : 3 : 6 |
| C. | 1 : 1½ : 3 |
| D. | 1 : 1 : 2 |
| Answer» D. 1 : 1 : 2 | |
| 22. |
The percentage of the aggregate of F.M. 2.6 to be combined with coarse aggregate of F.M. 6.8 for obtaining the aggregates of F.M. 5.4, is |
| A. | 30 % |
| B. | 40 % |
| C. | 50 % |
| D. | 60 % |
| Answer» D. 60 % | |
| 23. |
According to I.S. : 456, the number of grades of concrete mixes, is |
| A. | 3 |
| B. | 4 |
| C. | 5 |
| D. | 7 |
| Answer» E. | |
| 24. |
Grading of sand causes great variation in |
| A. | workability of concrete |
| B. | strength of concrete |
| C. | durability of concrete |
| D. | all the above |
| Answer» E. | |
| 25. |
The commonly used material in the manufacture of cement is |
| A. | sand stone |
| B. | slate |
| C. | lime stone |
| D. | graphite |
| Answer» D. graphite | |
| 26. |
Maximum percentage reinforcement in case of slabs is limited to |
| A. | 2 |
| B. | 4 |
| C. | 6 |
| D. | 8 |
| Answer» C. 6 | |
| 27. |
Too wet concrete may cause |
| A. | weakness of concrete |
| B. | excessive laitance |
| C. | segregation |
| D. | all the above |
| Answer» E. | |
| 28. |
The maximum thickness of concrete floor of a cement warehouse, is |
| A. | 10 cm |
| B. | 15 cm |
| C. | 20 cm |
| D. | 25 cm |
| Answer» E. | |
| 29. |
The shrinkage of concrete |
| A. | is proportional to water content is the mix |
| B. | is proportional to cement concrete |
| C. | increases with age of concrete |
| D. | all the above |
| Answer» E. | |
| 30. |
The most useless aggregate is one whose surface texture is |
| A. | smooth |
| B. | granular |
| C. | glassy |
| D. | honey combed and porous |
| Answer» D. honey combed and porous | |
| 31. |
For a continuous slab of 3 m × 3.5 m size, the minimum overall depth of slab to satisfy vertical deflection limits is |
| A. | 50 mm |
| B. | 75 mm |
| C. | 100 mm |
| D. | 120 mm |
| Answer» C. 100 mm | |
| 32. |
1% of voids in a concrete mix would reduce its strength by about |
| A. | 5 % |
| B. | 10 % |
| C. | 15 % |
| D. | 20 % |
| Answer» B. 10 % | |
| 33. |
The operation of removing humps and hollows of uniform concrete surface, is known as |
| A. | floating |
| B. | screeding |
| C. | trowelling |
| D. | finishing |
| Answer» C. trowelling | |
| 34. |
The recommended value of modular ratio for reinforced brick work is |
| A. | 18 |
| B. | 30 |
| C. | 40 |
| D. | 58 |
| Answer» D. 58 | |
| 35. |
Pozzolana cement is used with confidence for construction of |
| A. | dams |
| B. | massive foundations |
| C. | r.c.c. structures |
| D. | all the above |
| Answer» E. | |
| 36. |
The ratio of the diameter of reinforcing bars and the slab thickness is |
| A. | 1/4 |
| B. | 1/5 |
| C. | 1/6 |
| D. | 1/8 |
| Answer» E. | |
| 37. |
For an ordinary Portland cement |
| A. | residual does not exceed 10% when sieved through is sieve no. 9 |
| B. | soundness varies from 5 to 10 mm |
| C. | initial setting time is not less than 30 minutes |
| D. | compressive stress after 7 days, is not less than 175 kg/cm2 |
| Answer» D. compressive stress after 7 days, is not less than 175 kg/cm2 | |
| 38. |
The percentage of voids in cement is approximately |
| A. | 25 % |
| B. | 40 % |
| C. | 60 % |
| D. | 80 % |
| Answer» C. 60 % | |
| 39. |
Water required per bag of cement, is |
| A. | 7 kg |
| B. | 14 kg |
| C. | 21 kg |
| D. | 35 kg |
| Answer» E. | |
| 40. |
If 1500 g of water is required to have a cement paste 1875 g of normal consistency, the percentage of water is, |
| A. | 20 % |
| B. | 25 % |
| C. | 30 % |
| D. | 35 % |
| Answer» C. 30 % | |
| 41. |
In case of hand mixing of concrete, the extra cement to be added is |
| A. | 5 % |
| B. | 10 % |
| C. | 15 % |
| D. | 20 % |
| Answer» C. 15 % | |
| 42. |
The mixture of different ingredients of cement, is burnt at |
| A. | 1000°c |
| B. | 1200°c |
| C. | 1400°c |
| D. | 1600°c |
| Answer» D. 1600°c | |
| 43. |
The load factors for live load and dead load are taken respectively as |
| A. | 1.5 and 2.2 |
| B. | 2.2 and 1.5 |
| C. | 1.5 and 1.5 |
| D. | 2.2 and 2.2 |
| Answer» C. 1.5 and 1.5 | |
| 44. |
The process of proper and accurate measurement of concrete ingredients for uniformity of proportion, is known |
| A. | grading |
| B. | curing |
| C. | mixing |
| D. | batching |
| Answer» E. | |
| 45. |
For given water content, workability decreases if the concrete aggregates contain an excess of |
| A. | thin particles |
| B. | flat particles |
| C. | elongated particles |
| D. | all the above |
| Answer» E. | |
| 46. |
The most commonly used admixture which prolongs the setting and hardening time is |
| A. | gypsum |
| B. | calcium chloride |
| C. | sodium silicate |
| D. | all of the above |
| Answer» B. calcium chloride | |
| 47. |
After casting, an ordinary cement concrete on drying |
| A. | expands |
| B. | mix |
| C. | shrinks |
| D. | none of these |
| Answer» D. none of these | |
| 48. |
The fineness modulus of fine aggregate is in the range of |
| A. | 2.0 to 3.5 |
| B. | 3.5 to 5.0 |
| C. | 5.0 to 7.0 |
| D. | 6.0 to 8.5 |
| Answer» B. 3.5 to 5.0 | |
| 49. |
A T-shaped retaining wall mainly consists of |
| A. | one cantilever |
| B. | two cantilevers |
| C. | three cantilevers |
| D. | four cantilevers |
| Answer» D. four cantilevers | |
| 50. |
The rock which is not calcareous, is: |
| A. | lime stone |
| B. | chalk |
| C. | laterite |
| D. | none of these |
| Answer» E. | |