McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Civil Engineering .
| 201. |
A retaining wall 6m high supports a backfill with a surcharge angle of 10°. The back of the wall is inclined to the vertical at a positive batter angle of 5°. If the angle of wall friction is 7°, then the resultant active earth pressure will act at a distance of 2 m above the base and inclined to the horizontal at an angle of |
| A. | 7° |
| B. | 10° |
| C. | 12° |
| D. | 17° |
| Answer» C. 12° | |
| 202. |
The minimum water content at which the soil just begins to crumble when rolled into threads 3 mm in diameter, is known |
| A. | Liquid limit |
| B. | Plastic limit |
| C. | Shrinkage limit |
| D. | Permeability limit |
| Answer» B. Plastic limit | |
| 203. |
The minimum water content at which the soil retains its liquid state and also possesses a small shearing strength against flowing, is known |
| A. | Liquid limit |
| B. | Plastic limit |
| C. | Shrinkage limit |
| D. | Permeability limit |
| Answer» A. Liquid limit | |
| 204. |
'Drift' is the material picked up, mixed, disintegrated, transported and redeposited by |
| A. | Wind |
| B. | Gravitational force |
| C. | Glaciated water |
| D. | All the above |
| Answer» C. Glaciated water | |
| 205. |
The ratio of volume of voids to the total volume of soil mass is called |
| A. | Air content |
| B. | Porosity |
| C. | Percentage air voids |
| D. | Voids ratio |
| Answer» B. Porosity | |
| 206. |
The ratio of the volume of voids to the volume of soil solids in a given soil mass, is known |
| A. | Porosity |
| B. | Specific gravity |
| C. | Void ratio |
| D. | Water content |
| Answer» C. Void ratio | |
| 207. |
The specific yield of soil depends upon |
| A. | Compaction of stratum |
| B. | Distribution of pores |
| C. | Shape and size of particles |
| D. | All the above |
| Answer» D. All the above | |
| 208. |
The hydrometer method of sedimentation analysis differs from the pipette analysis mainly in |
| A. | The principle of test |
| B. | The method of taking observations |
| C. | The method of preparation of soil suspension |
| D. | All of the above |
| Answer» B. The method of taking observations | |
| 209. |
Degree of saturation of a natural soil deposit having water content 15%, specific gravity 2.50 and void ratio 0.5, is |
| A. | 50 % |
| B. | 60 % |
| C. | 75 % |
| D. | 80 % |
| Answer» C. 75 % | |
| 210. |
Cohesionless soil is |
| A. | Sand |
| B. | Silt |
| C. | Clay |
| D. | Clay and silt |
| Answer» A. Sand | |
| 211. |
At liquid limit, all soils possess |
| A. | Same shear strength of small magnitude |
| B. | Same shear strength of large magnitude |
| C. | Different shear strengths of small magnitude |
| D. | Different shear strengths of large magnitude |
| Answer» A. Same shear strength of small magnitude | |
| 212. |
The ratio of the weight of given volume of soil solids to the weight of an equal volume of distilled water at the given temperature, is known |
| A. | Porosity |
| B. | Specific gravity |
| C. | Void ratio |
| D. | Water content |
| Answer» B. Specific gravity | |
| 213. |
If the water table rises upto ground surface, then the |
| A. | Effective stress is reduced due to decrease in total stress only but pore water pressure does not change |
| B. | Effective stress is reduced due to increase in pore water pressure only but total stress does not change |
| C. | Total stress is reduced due to increase in pore water pressure only but effective stress does not change |
| D. | Total stress is increased due to decrease in pore water pressure but effective stress does not change |
| Answer» B. Effective stress is reduced due to increase in pore water pressure only but total stress does not change | |
| 214. |
A coarse-grained soil has a voids ratio 0.75, and specific gravity as 2.75. The critical gradient at which quick sand condition occurs, is |
| A. | 0.25 |
| B. | 0.50 |
| C. | 0.75 |
| D. | 1.00 |
| Answer» D. 1.00 | |
| 215. |
The shear strength of a soil |
| A. | Increases with an increase in the normal stress |
| B. | Is proportional to the cohesion of the soil |
| C. | Is generally known as the strength of the soil |
| D. | All the above |
| Answer» D. All the above | |
| 216. |
Total number of stress components at a point within a soil mass loaded at its boundary is |
| A. | 3 |
| B. | 6 |
| C. | 9 |
| D. | 16 |
| Answer» C. 9 | |
| 217. |
The ratio of the undrained strength in the undrained state to the undrained strength, at the same water content, in the remoulded state, is called the sensivity of the clay. Its value for quick clays is |
| A. | 4 |
| B. | 8 |
| C. | 12 |
| D. | 20 |
| Answer» D. 20 | |
| 218. |
The ultimate consolidation settlement of a soil is |
| A. | Directly proportional to the voids ratio |
| B. | Directly proportional to the compression index |
| C. | Inversely proportional to the compression index |
| D. | None of the above |
| Answer» B. Directly proportional to the compression index | |
| 219. |
The ratio of settlement at any time 't' to the final settlement, is known as |
| A. | Co-efficient of consolidation |
| B. | Degree of consolidation |
| C. | Consolidation index |
| D. | Consolidation of undisturbed soil |
| Answer» B. Degree of consolidation | |
| 220. |
Pick up the correct statement from the following: |
| A. | In hydrometer method, weight W d per ml of suspension is found directly |
| B. | In pipette analysis, weight Wd per ml of suspension is found indirectly |
| C. | In pipette analysis, weight Wd per ml of suspension is found directly |
| D. | None of these |
| Answer» C. In pipette analysis, weight Wd per ml of suspension is found directly | |
| 221. |
Unconfmed compressive strength test is |
| A. | Undrained test |
| B. | Drained test |
| C. | Consolidated undrained test |
| D. | Consolidated drained test |
| Answer» A. Undrained test | |
| 222. |
For shear strength, triaxial shear test is suitable because |
| A. | It can be performed under all three drainage conditions |
| B. | Precise measurement of the pore pressure and volume change during the test is possible |
| C. | Stress distribution on the failure plane, is uniform |
| D. | All the above |
| Answer» D. All the above | |
| 223. |
The zero atmospheric pressure is at |
| A. | Sea level |
| B. | Water table |
| C. | Phreatic surface |
| D. | Both (B) and (C) of the above |
| Answer» D. Both (B) and (C) of the above | |
| 224. |
Terzaghi's bearing capacity factors Nc, Nq and Nr are functions of |
| A. | Cohesion only |
| B. | Angle of internal friction only |
| C. | Both cohesion and angle of internal friction |
| D. | None of the above |
| Answer» B. Angle of internal friction only | |
| 225. |
'Loess' is silty clay formed by the action of |
| A. | Water |
| B. | Glacier |
| C. | Wind |
| D. | Gravitational force |
| Answer» C. Wind | |
| 226. |
Rise of water table in cohesion-less soils upto ground surface reduces the net ultimate bearing capacity approximately by |
| A. | 25 % |
| B. | 50 % |
| C. | 75 % |
| D. | 90 % |
| Answer» B. 50 % | |
| 227. |
A decrease in water content results in a reduction of the volume of a soil in |
| A. | Liquid state |
| B. | Plastic state |
| C. | Semi solid state |
| D. | All of these |
| Answer» D. All of these | |
| 228. |
In non-cohesive soil in passive state of plastic equilibrium |
| A. | Major principal stress is horizontal |
| B. | Minor principal stress is vertical |
| C. | Major principal stress is vertical |
| D. | Minor and major principal stresses are equally inclined to the horizontal |
| Answer» B. Minor principal stress is vertical | |
| 229. |
A soil has a bulk density of 22 kN/m3 and water content 10 %. The dry density of soil is |
| A. | 18.6 kN/m3 |
| B. | 20.0 kN/m3 |
| C. | 22.0 kN/m3 |
| D. | 23.2 kN/m3 |
| Answer» B. 20.0 kN/m3 | |
| 230. |
If the sand in-situ is in its densest state, then the relative density of sand is |
| A. | Zero |
| B. | 1 |
| C. | Between 0 and 1 |
| D. | Greater than 1 |
| Answer» B. 1 | |
| 231. |
If dry density, water density and specific gravity of solids of a given soil sample are 1.6 g/cc, 1.84 g/cc and 2.56 respectively, the porosity of the soil sample, is |
| A. | 0.375 |
| B. | 0.370 |
| C. | 0.380 |
| D. | 0.390 |
| Answer» A. 0.375 | |
| 232. |
The property of a soil which permits water to percolate through it, is called |
| A. | Moisture content |
| B. | Permeability |
| C. | Capillarity |
| D. | None of these |
| Answer» B. Permeability | |
| 233. |
Toughness index is defined as the ratio of |
| A. | Plasticity index to consistency index |
| B. | Plasticity index to flow index |
| C. | Liquidity index to flow index |
| D. | Consistency index to liquidity index |
| Answer» B. Plasticity index to flow index | |
| 234. |
A moist soil sample of volume 60 cc. weighs 108 g and its dried weight is 86.4 g. If its absolute density is 2.52, the degree of saturation is |
| A. | 54 % |
| B. | 64 % |
| C. | 74 % |
| D. | 84 % |
| Answer» D. 84 % | |
| 235. |
The hydraulic head that would produce a quick condition in a sand stratum of thickness 1.5m, specific gravity 2.67 and voids ratio 0.67 is equal to |
| A. | 1.0 m |
| B. | 1.5 m |
| C. | 2.0 m |
| D. | 3 m |
| Answer» B. 1.5 m | |
| 236. |
The factor which affects the compaction, is |
| A. | Moisture content |
| B. | Compacting content |
| C. | Method of compaction |
| D. | All the above |
| Answer» D. All the above | |
| 237. |
In a consolidated drained test on a normally consolidated clay, the volume of the soil sample during shear |
| A. | Decreases |
| B. | Increases |
| C. | Remains unchanged |
| D. | First increases and then decreases |
| Answer» A. Decreases | |
| 238. |
Pick up the correct statement from the following: |
| A. | The rise of the ground surface due to frost action is called frost heave |
| B. | The freezing of water is accompanied by a volume increase of 9% |
| C. | Below freezing point, higher soil suction develops |
| D. | All the above |
| Answer» D. All the above | |
| 239. |
The maximum value of effective stress in the past divided by the present value is defined as over consolidation ratio (OCR). The O.C.R. of an over consolidated clay is |
| A. | Less than 1 |
| B. | 1 |
| C. | More than 1 |
| D. | None of these |
| Answer» C. More than 1 | |
| 240. |
A 300 mm square bearing plate settles by 15 mm in a plate load test on a cohesive soil when the intensity of loading is 0.2 N/mm². The settlement of a prototype shallow footing 1 m square under the same intensity of loading is |
| A. | 15 mm |
| B. | 30 mm |
| C. | 50 mm |
| D. | 167 mm |
| Answer» C. 50 mm | |
| 241. |
The effective size of particles of soil is denoted by |
| A. | D10 |
| B. | D20 |
| C. | D30 |
| D. | D60 |
| Answer» A. D10 | |
| 242. |
If S, L and R are the arc length, long chord and radius of the sliding circle then the perpendicular distance of the line of the resultant cohesive force, is given by |
| A. | a = S.R/ L |
| B. | a = L.S/R |
| C. | a = L.R/S |
| D. | None of these |
| Answer» A. a = S.R/ L | |
| 243. |
Uniformity coefficient of a soil is |
| A. | Always less than 1 |
| B. | Always equal to 1 |
| C. | Equal to or less than 1 |
| D. | Equal to or greater than 1 |
| Answer» D. Equal to or greater than 1 | |
| 244. |
The fluid generally used for grouting is |
| A. | Cement and water mix |
| B. | Clay suspension |
| C. | Sodium silicate |
| D. | All the above |
| Answer» D. All the above | |
| 245. |
The total and effective stresses at a depth of 5 m below the top level of water in a swimming pool are respectively |
| A. | Zero and zero |
| B. | 0.5 kg/cm² and zero |
| C. | 0.5 kg/cm² and 0.5 kg/cm² |
| D. | 1.0 kg/cm² and 0.5 kg/cm² |
| Answer» B. 0.5 kg/cm² and zero | |
| 246. |
Time factor for a clay layer is |
| A. | A dimensional parameter |
| B. | Directly proportional to permeability of soil |
| C. | Inversely proportional to drainage path |
| D. | Independent of thickness of clay layer |
| Answer» B. Directly proportional to permeability of soil | |
| 247. |
The critical exist gradient of seepage water in soils, is |
| A. | Directly proportional to the voids ratio |
| B. | Inversely proportional to the specific gravity |
| C. | Directly proportional to the specific gravity |
| D. | None of these |
| Answer» D. None of these | |
| 248. |
In the triaxial compression test, the application of additional axial stress (i.e. deviator stress) on the soil specimen produces shear stress on |
| A. | Horizontal plane only |
| B. | Vertical plane only |
| C. | Both horizontal and vertical planes |
| D. | All planes except horizontal and vertical planes |
| Answer» D. All planes except horizontal and vertical planes | |
| 249. |
For a clay slope of height of 10 m, the stability number is 0.05, = 2.0 t/m3, C = 2.5 t/m2, the critical height of the slope of the soil, is |
| A. | 4.0 m |
| B. | 12.5 m |
| C. | 25.0 m |
| D. | 15.0 m |
| Answer» C. 25.0 m | |
| 250. |
Allowable bearing pressure for a foundation depends upon |
| A. | Allowable settlement only |
| B. | Ultimate bearing capacity of soil only |
| C. | Both allowable settlement and ultimate bearing capacity |
| D. | None of above |
| Answer» C. Both allowable settlement and ultimate bearing capacity | |
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