McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Civil Engineering .
| 1. |
Processes of cement manufacturing is…….? |
| A. | Wet process |
| B. | Dry process |
| C. | Semi-dry process |
| D. | All of above |
| Answer» D. All of above | |
| 2. |
After 28 days of curing, cement gains have been found to have hydrated to a depth of only…..u. |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 6 |
| Answer» C. 4 | |
| 3. |
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» B. 38 | |
| 4. |
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» D. All the above. | |
| 5. |
Proper proportioning of concrete, ensures |
| A. | desired strength and workability |
| B. | desired durability |
| C. | water tightness of the structure |
| D. | all the above |
| Answer» D. all the above | |
| 6. |
An aggregate is said to be flaky if its least dimension is less than |
| A. | 1/5th of mean dimension |
| B. | 2/5th of mean dimension |
| C. | 3/5th of mean dimension |
| D. | 4/5th of mean dimension |
| Answer» C. 3/5th of mean dimension | |
| 7. |
A small quantity of …………. % of gypsum is added to prevent flash-setting of the cement. |
| A. | 1 to 2 |
| B. | 2 to 3 |
| C. | 9 to 10 |
| D. | 10 to 12 |
| Answer» B. 2 to 3 | |
| 8. |
Highest oxide composition present in cement is…… |
| A. | Silica |
| B. | Alumina |
| C. | Iron oxides |
| D. | Lime |
| Answer» D. Lime | |
| 9. |
First 7 days strength in cement is due to….. Bogue compound. |
| A. | C3S |
| B. | C2S |
| C. | C3A |
| D. | C4AF |
| Answer» A. C3S | |
| 10. |
Heat of hydration of C3S at 90 days is ………. cal/g |
| A. | 58 |
| B. | 104 |
| C. | 122 |
| D. | 150 |
| Answer» B. 104 | |
| 11. |
…………refers to the gain of strength of a set cement paste. |
| A. | Setting of cement |
| B. | Hardening of cement |
| C. | none |
| D. | all |
| Answer» B. Hardening of cement | |
| 12. |
For long time storage ……..cement used. |
| A. | Masonry cement |
| B. | Ordinary |
| C. | Hydrophobic |
| D. | All of above |
| Answer» C. Hydrophobic | |
| 13. |
Repair of air-field pavement use…… |
| A. | Air entrained cement |
| B. | Very high Strength cement |
| C. | Rediset Cement |
| D. | All of above |
| Answer» B. Very high Strength cement | |
| 14. |
Note more than ……. bags should be kept one above other. |
| A. | 20 |
| B. | 25 |
| C. | 14 |
| D. | Any of above |
| Answer» C. 14 | |
| 15. |
For Fineness test ……. micron sieve is use. |
| A. | 100 |
| B. | 80 |
| C. | 60 |
| D. | 90 |
| Answer» D. 90 | |
| 16. |
The weight of residue should not exceed ……. for OPC. |
| A. | 10 % |
| B. | 20 % |
| C. | 30% |
| D. | 40% |
| Answer» A. 10 % | |
| 17. |
For consistency test vicat plunger having ……. dia and …….. Length is used. |
| A. | 15 mm & 45 mm |
| B. | 10 mm & 50 mm |
| C. | 20 mm & 60mm |
| D. | Any of above |
| Answer» B. 10 mm & 50 mm | |
| 18. |
For OPC Value of IST And FST is…… . |
| A. | 30 m & 600 m |
| B. | 50 m & 700 m |
| C. | 20m & 500 m |
| D. | 40m & 800 m |
| Answer» A. 30 m & 600 m | |
| 19. |
For compressive strength test of cement ………. water is added. |
| A. | p/3 + 3 |
| B. | p/2 + 3 |
| C. | p/4 + 3 |
| D. | p/5 +3 |
| Answer» C. p/4 + 3 | |
| 20. |
Undesirable expansion of some of constituents of cement after setting is known as……… . |
| A. | Soundness |
| B. | unsoundness |
| C. | none |
| D. | all |
| Answer» B. unsoundness | |
| 21. |
Density of light weight aggregate concrete is about …….. kg/m3 . |
| A. | 3000 |
| B. | 1500 |
| C. | 1200 |
| D. | 1400 |
| Answer» C. 1200 | |
| 22. |
Material between…………… is classified as silt. |
| A. | 002 mm to 0.003 mm |
| B. | 0.08 mm to 1 mm |
| C. | 8 mm to 10 mm |
| D. | 0.06 mm to 0.002 mm |
| Answer» D. 0.06 mm to 0.002 mm | |
| 23. |
Angular aggregate having percentage of voids ranging from………. |
| A. | 32 to 33 |
| B. | 35 to 38 |
| C. | 38 to 40 |
| D. | 40 to 45 |
| Answer» C. 38 to 40 | |
| 24. |
In crushing value test of aggregate, gradually compressive load of….. Tons is apply. |
| A. | 40 |
| B. | 50 |
| C. | 44 |
| D. | 45 |
| Answer» A. 40 | |
| 25. |
Specific gravity of natural aggregate lie between…… |
| A. | 2.5 to 2.6 |
| B. | 2.6 to 2.7 |
| C. | 2.6 to 2.8 |
| D. | 2.8 to 2.9 |
| Answer» C. 2.6 to 2.8 | |
| 26. |
Coarse aggregates absorbs…….. % of moisture. |
| A. | 1 to 2 |
| B. | 0.5 to 1 |
| C. | 2 to 4 |
| D. | 2 to 3 |
| Answer» B. 0.5 to 1 | |
| 27. |
To control alkali aggregate reaction restricting alkali content in cement below……% |
| A. | 1 |
| B. | 0.1 |
| C. | 0.5 |
| D. | 0.6 |
| Answer» D. 0.6 | |
| 28. |
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» C. medium | |
| 29. |
Fineness modulus of fine sand is…… . |
| A. | 2.2 – 2.6 |
| B. | 2.6 – 2.9 |
| C. | 2.9 – 3.2 |
| D. | 3.2 - 4.2 |
| Answer» A. 2.2 – 2.6 | |
| 30. |
Permissible limit organic solids in water is……..mg/l |
| A. | 400 |
| B. | 600 |
| C. | 200 |
| D. | 500 |
| Answer» C. 200 | |
| 31. |
Bigger size of aggregate will give higher workability. |
| A. | True |
| B. | False |
| C. | none |
| D. | all |
| Answer» A. True | |
| 32. |
To measure workability of concrete in field …………….test is used. |
| A. | Flow test |
| B. | Compacting factor test |
| C. | Slump test |
| D. | All of above |
| Answer» C. Slump test | |
| 33. |
Steel tamping rod of 0.6m length and 16 mm diameter is used for tamping of concrete. |
| A. | False |
| B. | True |
| C. | none |
| D. | all |
| Answer» B. True | |
| 34. |
Types of slump is….. |
| A. | True slump |
| B. | Shear slump |
| C. | Collapse slump |
| D. | All of above |
| Answer» D. All of above | |
| 35. |
25 to 75 mm workability of concrete, indicate |
| A. | High workability |
| B. | Medium workability |
| C. | Low workability |
| D. | Any of this |
| Answer» C. Low workability | |
| 36. |
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» A. True | |
| 37. |
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» A. True | |
| 38. |
The value of flow % may range anything from 0 to …. % |
| A. | 200 |
| B. | 250 |
| C. | 210 |
| D. | 150 |
| Answer» D. 150 | |
| 39. |
Separating out of the ingredients of concrete mix from concrete is known as……… . |
| A. | Segregation |
| B. | bleeding |
| C. | separation |
| D. | Any of these |
| Answer» A. Segregation | |
| 40. |
Water from concrete comes out to the surface of the concrete is known as………. |
| A. | Segregation |
| B. | bleeding |
| C. | separation |
| D. | Any of these |
| Answer» B. bleeding | |
| 41. |
Main causes of bleeding : |
| A. | Highly wet mix |
| B. | Badly proportion mix |
| C. | Insufficiently mixed concrete |
| D. | All of this |
| Answer» D. All of this | |
| 42. |
The formation of cement paste at the surface is known as laitance. |
| A. | True |
| B. | False |
| C. | none |
| D. | all |
| Answer» A. True | |
| 43. |
Workability of concrete is……. to the w/c. |
| A. | proportional |
| B. | inversely proportional |
| C. | none |
| D. | all |
| Answer» A. proportional | |
| 44. |
Workability of concrete is …….to the strength of concrete. |
| A. | proportional |
| B. | inversely proportional |
| C. | none |
| D. | all |
| Answer» B. inversely proportional | |
| 45. |
Good method for proportioning the materials. |
| A. | Weight batching |
| B. | Volume batching |
| C. | none |
| D. | all |
| Answer» A. Weight batching | |
| 46. |
In Volume batching 1 bag cement = |
| A. | 35 lit |
| B. | 40 lit |
| C. | 45 lit |
| D. | 50 lit |
| Answer» A. 35 lit | |
| 47. |
In volume batching………. % of bulking is take into account. |
| A. | 30 |
| B. | 40 |
| C. | 20 |
| D. | 10 |
| Answer» C. 20 | |
| 48. |
Density of water is 1 kg/liter. |
| A. | True |
| B. | false |
| C. | none |
| D. | all |
| Answer» A. True | |
| 49. |
In hand mixing …….. % more cement is added in mix. |
| A. | 30 |
| B. | 40 |
| C. | 20 |
| D. | 10 |
| Answer» D. 10 | |
| 50. |
Concrete mixer are generally designed to run at a speed of ……….. Revolution per minute. |
| A. | 40 to 50 |
| B. | 30 to 40 |
| C. | 15 to 20 |
| D. | 20 to 30 |
| Answer» C. 15 to 20 | |
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