McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Civil Engineering .
| 251. |
Pick up the correct statement from the following: |
| A. | The property of a soil that enables it to become stiff in a relatively short time on standing is called thixotropy |
| B. | The ratio of shear strength in natural state to the remoulded shear strength under undrained conditions is called degree of sensitivity |
| C. | The difference between the undisturbed shear strength and remoulded shear strength is known remoulding loss |
| D. | All the above |
| Answer» D. All the above | |
| 252. |
Voids ratio of a soil mass can |
| A. | Never be greater than unity |
| B. | Be zero |
| C. | Take any value greater than zero |
| D. | Take values between 0 and 1 only |
| Answer» C. Take any value greater than zero | |
| 253. |
If the cohesive force (c), is 1.5 t/m2, the density ) of the soil is 2.0 t/m3, factor of safety (F) is 1.5 and stability factor (Sn) is 0.05, the safe height of a slope is |
| A. | 5 metres |
| B. | 8 metres |
| C. | 10 metres |
| D. | 12 metres |
| Answer» C. 10 metres | |
| 254. |
If the plasticity index of a soil mass is zero, the soil is |
| A. | Sand |
| B. | Silt |
| C. | Clay |
| D. | Clayey silt |
| Answer» A. Sand | |
| 255. |
Coulomb's wedge theory assumes that |
| A. | Back fill is dry, cohesionless, homogeneous and isotropic |
| B. | Slip surface is the plane which passes through the heel of the wall |
| C. | Position and direction of the resultant earth pressure are known |
| D. | All the above |
| Answer» D. All the above | |
| 256. |
Due to a rise in temperature, the viscosity and the unit weight of the percolating fluid are reduced to 60% and 90% respectively. If other things remain constant, the coefficient of permeability |
| A. | Increases by 25 % |
| B. | Increases by 50 % |
| C. | Increases by 33.3 % |
| D. | Decreases by 33.3 % |
| Answer» B. Increases by 50 % | |
| 257. |
Transporting and re-depositing soils, is done by |
| A. | Water |
| B. | Glacier |
| C. | Gravity |
| D. | All the above |
| Answer» D. All the above | |
| 258. |
For a loose sand sample and a dense sand sample consolidated to the same effective stress |
| A. | Ultimate strength is same and also peak strength is same |
| B. | Ultimate strength is different but peak strength is same |
| C. | Ultimate strength is same but peak strength of dense sand is greater than that of loose sand |
| D. | Ultimate strength is same but peak |
| Answer» C. Ultimate strength is same but peak strength of dense sand is greater than that of loose sand | |
| 259. |
The void ratio of a soil sample decreases from 1.50 to 1.25 when the pressure is increased from 25 tonnes/m2 to 50 tonnes/m2, the coefficient of compressibility is |
| A. | 0.01 |
| B. | 0.02 |
| C. | 0.05 |
| D. | 0.001 |
| Answer» A. 0.01 | |
| 260. |
The coefficient of active earth pressure for a loose sand having an angle of internal friction of 30° is |
| A. | 1/3 |
| B. | 3 |
| C. | 1 |
| D. | 1/2 |
| Answer» B. 3 | |
| 261. |
If the degree of saturation of a partially saturated soil is 60%, then air content of the soil is |
| A. | 40 % |
| B. | 60 % |
| C. | 80 % |
| D. | 100 % |
| Answer» A. 40 % | |
| 262. |
Which one of the following statements is true? |
| A. | Clays are more porous than sands |
| B. | Pressure of organic matter in a soil decreases the bearing capacity of the soil |
| C. | Aluminous cement is used for foundations in soils with chemical deposits |
| D. | All the above |
| Answer» D. All the above | |
| 263. |
According to IS classification, the range of silt size particles is |
| A. | 4.75 mm to 2.00 mm |
| B. | 2.00 mm to 0.425 mm |
| C. | 0.425 mm to 0.075 mm |
| D. | 0.075 mm to 0.002 mm |
| Answer» D. 0.075 mm to 0.002 mm | |
| 264. |
Pick up the clay soil group which does not swell when wet from the following: |
| A. | Kaolinite group |
| B. | Mite group |
| C. | Vermiculite group |
| D. | Montrorillonite group |
| Answer» B. Mite group | |
| 265. |
Coefficient of consolidation of a soil is affected by |
| A. | Compressibility |
| B. | Permeability |
| C. | Both compressibility and permeability |
| D. | None of the above |
| Answer» C. Both compressibility and permeability | |
| 266. |
Pick up the correct statement from the following: |
| A. | When water table is above the base of a footing, the dry weight m should be used for soil below water table |
| B. | When water table is located somewhat below the base of a footing, the elastic wedge is partly of moist soil and partly of submerged soil, and a suitable reduction factor is used |
| C. | When water table is just at the base of the footing, no reduction factor is used |
| D. | None of these |
| Answer» B. When water table is located somewhat below the base of a footing, the elastic wedge is partly of moist soil and partly of submerged soil, and a suitable reduction factor is used | |
| 267. |
Select the incorrect statement. Effective angle of shearing resistance |
| A. | Increases as the size of particles increases |
| B. | Increases as the soil gradation improves |
| C. | Is limited to a maximum value of 45° |
| D. | Is rarely more than 30° for fine grained soil |
| Answer» C. Is limited to a maximum value of 45° | |
| 268. |
The relationship between void ratio (e) and porosity ratio (n) is: |
| A. | n = (1 + e )/(1 - e) |
| B. | e = (1 + n)/(1 - e) |
| C. | n = e/(1 - e) |
| D. | e = n/(1 - n) |
| Answer» D. e = n/(1 - n) | |
| 269. |
Relative density of a compacted dense sand is approximately equal to |
| A. | 0.4 |
| B. | 0.6 |
| C. | 0.95 |
| D. | 1.20 |
| Answer» C. 0.95 | |
| 270. |
Pick up the correct statement from the following: |
| A. | To an agriculturist, soil is the substance existing on the earth's surface, which grows and develops plants |
| B. | To a geologist, soil is the material in a relatively thin surface zone within which roots occur, and rest of the crust is termed as rock irrespective of hardness |
| C. | To an engineer, soil is the unaggregated and uncemented deposits of minerals and organic particles covering the earth's crust |
| D. | All the above |
| Answer» D. All the above | |
| 271. |
Inorganic soils with low compressibility are represented by |
| A. | MH |
| B. | SL |
| C. | ML |
| D. | CH |
| Answer» C. ML | |
| 272. |
In a triaxial compression test when drainage is allowed during the first stage (i. e. application of cell pressure) only and not during the second stage (i.e. application of deviator stress at constant cell pressure), the test is known as |
| A. | Consolidated drained test |
| B. | Consolidated undrained test |
| C. | Unconsolidated drained test |
| D. | Unconsolidated undrained test |
| Answer» B. Consolidated undrained test | |
| 273. |
The specific gravity of quartz, is |
| A. | 2.65 |
| B. | 2.72 |
| C. | 2.85 |
| D. | 2.90 |
| Answer» A. 2.65 | |
| 274. |
In hydrometer analysis for a soil mass |
| A. | Both meniscus correction and dispersing agent correction are additive |
| B. | Both meniscus correction and dispersing agent correction are subtractive |
| C. | Meniscus correction is additive and dispersing agent correction is subtractive |
| D. | Meniscus correction is subtractive and dispersing agent correction is additive |
| Answer» C. Meniscus correction is additive and dispersing agent correction is subtractive | |
| 275. |
The capillary rise of water |
| A. | Depends upon the force responsible |
| B. | Increases as the size of the soil particles increases |
| C. | Decreases as the size of the soil particles decreases |
| D. | Is less in wet soil than in dry soil |
| Answer» A. Depends upon the force responsible | |
| 276. |
The value of compression index for a remoulded sample whose liquid limit is 50% is |
| A. | 0.028 |
| B. | 0.28 |
| C. | 036 |
| D. | 0.036 |
| Answer» B. 0.28 | |
| 277. |
Fine sand possesses |
| A. | Good plasticity |
| B. | Limited plasticity |
| C. | Reasonable plasticity |
| D. | Clay |
| Answer» D. Clay | |
| 278. |
Coarse grained soils are best compacted by a |
| A. | Drum roller |
| B. | Rubber tyred roller |
| C. | Sheep's foot roller |
| D. | Vibratory roller |
| Answer» D. Vibratory roller | |
| 279. |
According to Atterberg, the soil is said to be of medium plasticity if the plasticity index PI is |
| A. | 0 < PI < 7 |
| B. | 7< PI < 17 |
| C. | 17 < PI <27 |
| D. | PI > 27 |
| Answer» B. 7< PI < 17 | |
| 280. |
The coefficient of curvature for a well graded soil, must be between |
| A. | 0.5 to 1.0 |
| B. | 1.0 to 3.0 |
| C. | 3.0 to 4.0 |
| D. | 4.0 to 5.0 |
| Answer» B. 1.0 to 3.0 | |
| 281. |
A normally consolidated clay settled 10 mm when effective stress was increased from 100 kN/m² to 200 kN/m². If the effective stress is further increased from 200 kN/m² to 400 kN/m², then the settlement of the same clay is |
| A. | 10 mm |
| B. | 20 mm |
| C. | 40 mm |
| D. | None of the above |
| Answer» A. 10 mm | |
| 282. |
The lateral earth pressure on a retaining wall |
| A. | Is equal to mass of the soil retained |
| B. | Proportional to the depth of the soil |
| C. | Proportional to the square of the depth of the soil |
| D. | Proportional to the internal friction of the soil |
| Answer» D. Proportional to the internal friction of the soil | |
| 283. |
If the permeability of a soil is 0.8 mm/sec, the type of soil is |
| A. | Gravel |
| B. | Sand |
| C. | Silt |
| D. | Clay |
| Answer» B. Sand | |
| 284. |
A compacted soil sample using 10% moisture content has a weight of 200 g and mass unit weight of 2.0 g/cm3. If the specific gravity of soil particles and water are 2.7 and 1.0, the degree of saturation of the soil is |
| A. | 11.1 % |
| B. | 55.6 % |
| C. | 69.6 % |
| D. | None of these |
| Answer» B. 55.6 % | |
| 285. |
Which of the following soils has more plasticity index? |
| A. | Sand |
| B. | Silt |
| C. | Clay |
| D. | Gravel |
| Answer» C. Clay | |
| 286. |
The liquid limit and plastic limit exist in |
| A. | Sandy soils |
| B. | Silty soils |
| C. | Gravel soils |
| D. | Clay soils |
| Answer» D. Clay soils | |
| 287. |
For determining the moisture content of a soil sample, the following data is available Weight of container = 260 g, Weight of soil sample and = 320 g container, Weight of soil sample (dried) and = 310 g container. The moisture content of the soil sample, is |
| A. | 15 % |
| B. | 18 % |
| C. | 20 % |
| D. | 25 % |
| Answer» C. 20 % | |
| 288. |
For a homogeneous earth dam 50 m high having 2 m free broad, a flow net was constructed and the results were : Number of potential drops = 2.4 Number of flow channels = 0.4. If co - efficiency of permeability of the dam material is 3 × 10-3 cm3/sec, the discharge per metre length of dam, is |
| A. | 12 × 10- 5 m3/sec |
| B. | 24 × 10-3 m3/sec |
| C. | 6 × 10-5 m3/sec |
| D. | 24 × 10- 5 m3/sec |
| Answer» D. 24 × 10- 5 m3/sec | |
| 289. |
The soil which contains finest grain particles, is |
| A. | Coarse sand |
| B. | Fine sand |
| C. | Silt |
| D. | Clay |
| Answer» D. Clay | |
| 290. |
The minimum centre to centre distance of friction piles of 1 m diameter, is |
| A. | 2 m |
| B. | 2 m to 3 m |
| C. | 3 m to 4 m |
| D. | 5 m |
| Answer» C. 3 m to 4 m | |
| 291. |
When drainage is permitted under initially applied normal stress only and full primarily consolidation is allowed to take place, the test is known as |
| A. | Quick test |
| B. | Drained test |
| C. | Consolidated undrained test |
| D. | None of these |
| Answer» C. Consolidated undrained test | |
| 292. |
The liquidity index is defined as a ratio expressed as percentage of |
| A. | Plastic limit minus the natural water content, to its plasticity index |
| B. | Natural water content minus its plastic limit to its plasticity index |
| C. | Natural water content plus its plastic limit to its plasticity index |
| D. | Liquid limit minus the natural water content to the plasticity index |
| Answer» B. Natural water content minus its plastic limit to its plasticity index | |
| 293. |
Number of piles required to support a column, is |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 294. |
According to the Indian Standards the specific gravity is the ratio of the unit weight of soil solids to that of water at a temperature of |
| A. | 17°C |
| B. | 23°C |
| C. | 27°C |
| D. | 30°C |
| Answer» C. 27°C | |
| 295. |
Maximum size of clay particles is: |
| A. | 0.002 mm |
| B. | 0.04 mm |
| C. | 0.06 mm |
| D. | 0.08 mm |
| Answer» A. 0.002 mm | |
| 296. |
The compression resulting from a long term static load and consequent escape of pore water, is known as |
| A. | Compaction |
| B. | Consolidation |
| C. | Swelling |
| D. | None of these |
| Answer» B. Consolidation | |
| 297. |
Minimum size of the particles of silt soil, is |
| A. | 0.002 mm |
| B. | 0.04 mm |
| C. | 0.06 mm |
| D. | 0.08 mm |
| Answer» A. 0.002 mm | |
| 298. |
The ultimate Settlement of a soil is directly proportional to: |
| A. | Depth of the compressible soil strata |
| B. | Compressive index |
| C. | Both (a) and (b) |
| D. | None of these |
| Answer» D. None of these | |
| 299. |
A pile is being driven with a drop hammer weighing 1800 kg and having a free fall of 1.00 m. If the penetration with last blow is 5 mm, the load carrying capacity of the pile, -according to the Engineering News formula, is |
| A. | 100 tonnes |
| B. | 50 tonnes |
| C. | 20 tonnes |
| D. | 10 tonnes |
| Answer» D. 10 tonnes | |
| 300. |
Water formed transported soil is |
| A. | Alluvial |
| B. | Marine |
| C. | Lacustrine |
| D. | Loess |
| Answer» D. Loess | |
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