MCQOPTIONS
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MCQOPTIONS
This section includes 23 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. |
On the same soil sample, both Standard and Modified Proctor compaction tests are conducted in the laboratory. The values of Optimum Moisture Content (OMC) and Maximum Dry Density (MDD) for modified test compared to those for standard compaction test will respectively |
| A. | Increase, Increase |
| B. | Decrease, Increase |
| C. | Increase, Decrease |
| D. | No change, Increase |
| Answer» C. Increase, Decrease | |
| 2. |
For standard compaction test done on soil, the mass of hammer and drop of the hammer are: |
| A. | 5.40 kg and 450 mm |
| B. | 2.60 kg and 310 mm |
| C. | 4.80 kg and 310 mm |
| D. | 2.60 kg and 450 mm |
| Answer» C. 4.80 kg and 310 mm | |
| 3. |
Match the List-I with the List-II and select the correct answer using the codes given belowList IList IIA. Optimum Moisture Content1. Compaction of cohesive soilB. Vibratory Rollers2. Compaction of Granular soilC. Zero air Void Line3. Maximum Dry Density 4. Relative Density 5. 100 % Saturation |
| A. | A - 4, B - 1, C - 3 |
| B. | A - 4, B - 1, C - 5 |
| C. | A - 3, B - 2, C - 5 |
| D. | A - 3, B - 2, C - 4 |
| Answer» D. A - 3, B - 2, C - 4 | |
| 4. |
Pneumatic tyred rollers are used for compaction for _______ soil of low plasticity. |
| A. | sandy |
| B. | loamy |
| C. | silty |
| D. | plastic |
| Answer» D. plastic | |
| 5. |
OMC-SP and MDD-SP denote the optimum moisture content and maximum dry density obtained from standard Proctor compaction test, respectively. OMC-MP and MDD-MP denote the optimum moisture content and maximum dry density obtained from the modified Proctor compaction test, respectively. Which one of the following is correct? |
| A. | OMC-SP < OMC-MP and MDD-SP < MDD-MP |
| B. | OMC-SP > OMC-MP and MDD-SP < MDD-MP |
| C. | OMC-SP < OMC-MP and MDD-SP > MDD-MP |
| D. | OMC-SP > OMC-MP and MDD-SP > MDD-MP |
| Answer» C. OMC-SP < OMC-MP and MDD-SP > MDD-MP | |
| 6. |
Compaction of granular soils are generally done by: |
| A. | vibratory rollers |
| B. | trenching machine |
| C. | grader |
| D. | clamshell |
| E. | grinder |
| Answer» B. trenching machine | |
| 7. |
If the permeability, shrinkage and swelling of a compacted soil having same density on dry side of optimum moisture content is compared with compaction on wet side of optimum, the variation in these properties will be |
| A. | more, less, higher |
| B. | more, more, higher |
| C. | more, more, less |
| D. | less, less, higher |
| Answer» B. more, more, higher | |
| 8. |
Amount of compaction greatly affects: |
| A. | Water content and Maximum dry intensity |
| B. | Saturation of soil |
| C. | None of the above |
| D. | All of the above |
| Answer» B. Saturation of soil | |
| 9. |
In a proctor test, 1.8 kg of moist soil was filled in the mould (volume = 944 cc) after compaction. A soil sample weighting 23 g was taken from the mould and oven dried for 24 hours at a temperature of 110°C. The weight of the dry sample was found to be 20 g. The specific gravity of soil solids is G = 2.7. The theoretical maximum value of the dry unit weight of the soil at that water content is equal to _____ |
| A. | 16.26 kN/m3 |
| B. | 4.67 kN/m3 |
| C. | 11.5 kN/m3 |
| D. | 18.85 kN/m3 |
| Answer» B. 4.67 kN/m3 | |
| 10. |
Proctor’s compaction test for the maximum dry density of a certain soil gave the results as: 1.77 gm/cc and OMC 14.44%. The specific gravity of the clay soil grain was 2.66. What was the saturation degree for this soil? |
| A. | 44% |
| B. | 55% |
| C. | 66% |
| D. | 77% |
| Answer» E. | |
| 11. |
Let E2 and E1 represent compaction energy deployed for compacting the soil as per modified compaction test and standard test, as per IS.Choose from the following correct ratio \(\frac{{{E_2}}}{{{E_1}}}\): |
| A. | 4.5 times |
| B. | 3.5 times |
| C. | 2 times |
| D. | None of the above |
| Answer» B. 3.5 times | |
| 12. |
Compaction of soil is measured in terms of |
| A. | dry density |
| B. | specific gravity |
| C. | compressibility |
| D. | permeability |
| Answer» B. specific gravity | |
| 13. |
In a Compaction test, as the compaction effort is increased, the optimum moisture content_____. |
| A. | increases first and then decreases |
| B. | decreases |
| C. | remains same |
| D. | increases |
| Answer» C. remains same | |
| 14. |
In a typical compaction curve as indicated in the diagram, points 'A: and 'B' have the same dry densities. Choose the most appropriate statement from the following: |
| A. | Soil at 'A' will have more swelling potential and less shrinking upon moisture variation, compared to 'B'. |
| B. | Soil at 'A' will have same swelling and shrinking potential as soil at 'B'. |
| C. | Soil at 'A' will have less swelling potential and higher shrinking potential compared with soil at 'B'. |
| D. | The swelling-shrinking potential for soil at 'A' and 'B, cannot be predicted with the given data |
| Answer» B. Soil at 'A' will have same swelling and shrinking potential as soil at 'B'. | |
| 15. |
Proctor Compaction test is performed to determine |
| A. | the maximum strength concrete can attain. |
| B. | maximum density and OMC of the soil. |
| C. | SBC after compaction. |
| D. | grading of the soil or concrete |
| Answer» C. SBC after compaction. | |
| 16. |
In compaction test, MDD stands for maximum dry density and OMC for optimum moisture content. As compaction energy increases, |
| A. | Both MDD and OMC increases |
| B. | MDD decreases and OMC increases |
| C. | MDD increases and OMC decreases |
| D. | No change in MDD and OMC |
| Answer» D. No change in MDD and OMC | |
| 17. |
Decrease in volume of soil mass under stress is called: ______. |
| A. | Compression |
| B. | Compressibility |
| C. | Consolidation |
| D. | Contraction |
| Answer» B. Compressibility | |
| 18. |
Proctor test is performed on the soil for: |
| A. | grain size analysis |
| B. | assessing its shear strength |
| C. | assessing its bearing capacity |
| D. | assessing its degree of compaction |
| Answer» E. | |
| 19. |
In a modified proctor test compaction of soils, the mass of the rammer is of ______ and dropped at a height of ______. |
| A. | 2.6 kg; 310 mm |
| B. | 2.6 kg; 450 mm |
| C. | 4.89 kg; 310 mm |
| D. | 4.89 kg; 450 mm |
| Answer» E. | |
| 20. |
For conducting a Standard Proctor Compaction Test, the weight of hammer (P in kg), the fall of hammer (Q in mm), the number of blows per layer (R) and the number of layers (S) required are respectively. |
| A. | P - 5.89 Q - 550 R - 50 S - 3 |
| B. | P - 4.89 Q - 450 R - 25 S - 3 |
| C. | P - 3.60 Q - 310 R - 35 S - 4 |
| D. | P - 2.60 Q - 310 R - 25 S - 3 |
| Answer» E. | |
| 21. |
In an unconfined compression test, a sample clay 100 mm long and 50 mm in diameter fails under a load of 150 N at 10% strain. What is the shearing resistance taking into account the effect of change in cross-section of the sample? |
| A. | 0.068 N/mm2 |
| B. | 0.088 N/mm2 |
| C. | 0.034 N/mm2 |
| D. | 0.044 N/mm2 |
| Answer» B. 0.088 N/mm2 | |
| 22. |
Consider the following statements regarding vibratory rollers:(i) Vibratory rollers are used for compacting granular soils and pavement layers with granular materials.(ii) Vibratory rollers are used for compacting non-plastic silts and fine sands.(iii) In vibratory rollers, compaction is effected due to both the dynamic effect of the vibratory force and also the static weight of the roller.Which of the above statement(s) is/are correct? |
| A. | (i) and (ii) |
| B. | (i) and (iii) |
| C. | (ii) and (iii) |
| D. | (i) only |
| Answer» C. (ii) and (iii) | |
| 23. |
Compaction test in the laboratory gave maximum dry unit weight of 18.15 kN/m3 at optimum moisture content of 15%. If specific gravity of soil solids is 2.7, the percentage air voids at optimum moisture content is |
| A. | 3.73% |
| B. | 8.86% |
| C. | 9.24% |
| D. | 11.83% |
| Answer» B. 8.86% | |