MCQOPTIONS
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MCQOPTIONS
This section includes 204 Mcqs, each offering curated multiple-choice questions to sharpen your Soil Mechanics and Foundations knowledge and support exam preparation. Choose a topic below to get started.
| 151. |
The pressure exerted by water on the soil through which it percolates, is known as |
| A. | hydrostatic pressure |
| B. | effective pressure |
| C. | seepage pressure |
| D. | none of these |
| Answer» D. none of these | |
| 152. |
If ko is the coefficient of earth pressure at rest, ka is the coefficient of active earth pressure, kp is the coefficient of passive earth pressure and ? is Poisson's ratio, then the value of (1 - ?/? is given by |
| A. | ka / kp |
| B. | ko / ka |
| C. | kp / ko |
| D. | 1 / ko |
| Answer» E. | |
| 153. |
The contact pressure of flexible footing on no-choesive soils is |
| A. | more in the centre than at the edges |
| B. | less in the centre than at the edges |
| C. | uniform throughout |
| D. | none of these |
| Answer» B. less in the centre than at the edges | |
| 154. |
When the soils are carried away by force of gravity, they are known as |
| A. | transported |
| B. | residual |
| Answer» B. residual | |
| 155. |
The critical gradient for all soils is normally |
| A. | 0.5 |
| B. | 1 |
| C. | 1.5 |
| D. | 2.5 |
| Answer» C. 1.5 | |
| 156. |
The contact pressure of rigid footing on cohesive soils is |
| A. | more in the centre than at the edges |
| B. | less in the centre than at the edges |
| C. | uniform throughout |
| D. | none of these |
| Answer» C. uniform throughout | |
| 157. |
Lacustrine soils are those soils which are |
| A. | deposited in sea water |
| B. | deposited at the bottom of the lakes |
| C. | transported by running water |
| D. | transported by wind |
| Answer» C. transported by running water | |
| 158. |
Mechanical weathering of soils is caused by |
| A. | periodical temperature changes |
| B. | splitting action of flowing water |
| C. | splitting action of ice |
| D. | all of these |
| Answer» E. | |
| 159. |
If the volume of voids is equal to the volume of soil solids, then the values of porosity and void ratio are respectively |
| A. | 0 and 0.5 |
| B. | 0 and 1 |
| C. | 0.5 and 1 |
| D. | 1 and 0.5 |
| Answer» D. 1 and 0.5 | |
| 160. |
The maximum water content of a saturated soil at which a reduction in its moisture does not cause a decrease in volume of the soil, is called |
| A. | liquid limit |
| B. | plastic limit |
| C. | elastic limit |
| D. | shrinkage limit |
| Answer» E. | |
| 161. |
A soil sample is having a specific gravity of 2.60 and a void ratio of 0.78. The water content in percentage required to fully saturate the soil at that void ratio will be |
| A. | 10 |
| B. | 30 |
| C. | 50 |
| D. | 70 |
| Answer» C. 50 | |
| 162. |
The seepage force in soils is |
| A. | proportional to head loss |
| B. | proportional to exit gradient |
| C. | perpendicular to the equi-potential lines |
| D. | all of these |
| Answer» E. | |
| 163. |
The submerged or buoyant unit weight of soil is equal to the |
| A. | sum |
| B. | difference |
| C. | product |
| D. | ratio |
| Answer» C. product | |
| 164. |
The dry density of a soil is same as the unit weight of solids. |
| A. | True |
| B. | False |
| Answer» C. | |
| 165. |
The water content ratio of a soil is defined as the ratio of the |
| A. | weight of water to the weight of solids |
| B. | volume of water to the volume of voids in the soil mass |
| C. | total volume of voids to the volume of soil solids |
| D. | total volume of voids to the total volume of soil |
| Answer» B. volume of water to the volume of voids in the soil mass | |
| 166. |
For a given soil mass, the void ratio is 0.60, water content is 18% and specific gravity of the soil particles is 2.6. The degree of saturation of the soil is |
| A. | 30% |
| B. | 50% |
| C. | 78% |
| D. | 82.50% |
| Answer» D. 82.50% | |
| 167. |
The specific gravity of a soil is the ratio of unit weight of soil solids to that of water at a temperature of |
| A. | 4? C |
| B. | 17?C |
| C. | 27?C |
| D. | 36?C |
| Answer» D. 36?C | |
| 168. |
The ratio of the unconfined compressive strength of undisturbed soil to the unconfined compressive strength of soil in a remoulded state, is called |
| A. | sensitivity |
| B. | thixotropy |
| C. | relative density |
| D. | bulk density |
| Answer» B. thixotropy | |
| 169. |
The water content is the ratio of weight of water to the weight of solids. |
| A. | Yes |
| B. | No |
| Answer» B. No | |
| 170. |
The angle of internal friction of round grained dense sand is about |
| A. | 5? to 25? |
| B. | 25? to 30? |
| C. | 30? to 35? |
| D. | 32? to 37? |
| Answer» E. | |
| 171. |
In case of footings in sand, if the soil pressure distribution is triangular, the maximum soil pressure is |
| A. | equal to |
| B. | double |
| C. | three times |
| D. | four times |
| Answer» C. three times | |
| 172. |
For a sandy soil, the angle of internal friction is 30?. If the major principal stress is 50 kN/m2 at failure, the corresponding minor principal stress will be |
| A. | 12.2 kN/m2 |
| B. | 16.66 kN/m2 |
| C. | 20.8 kN/m2 |
| D. | 27.2 kN/m2 |
| Answer» C. 20.8 kN/m2 | |
| 173. |
In the design of footings on sand, if the angle of internal friction is equal to 36?, the bearing capacity factors for |
| A. | general |
| B. | local |
| Answer» B. local | |
| 174. |
The angle of internal friction |
| A. | varies with the density of sand |
| B. | depends upon the amount of interlocking |
| C. | depends upon the particle shape and roughness |
| D. | all of the above |
| Answer» E. | |
| 175. |
The total stress is equal to the sum of the effective stress and pore water pressure. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 176. |
A dry soil sample weighing 100 g has volume of 60 ml and specific gravity 2.5. Its void ratio is |
| A. | 0.4 |
| B. | 0.5 |
| C. | 0.6 |
| D. | 0.8 |
| Answer» C. 0.6 | |
| 177. |
The angle of internal friction of round grained loose sand is about |
| A. | 5? to 25? |
| B. | 25? to 30? |
| C. | 30? to 35? |
| D. | 32? to 37? |
| Answer» C. 30? to 35? | |
| 178. |
The angle of shearing resistance for dry loose sand is same as that of angle of internal friction. |
| A. | Right |
| B. | Wrong |
| Answer» B. Wrong | |
| 179. |
The coefficient of active earth pressure for a loose sand having an angle of internal friction of 30?, is |
| A. | 1?2 |
| B. | 1?3 |
| C. | 1 |
| D. | 3 |
| Answer» C. 1 | |
| 180. |
Quich sand is a |
| A. | moist sand containing small particles |
| B. | condition which occurs in coarse sand |
| C. | condition in which a cohesionless soil loses at its strength because of upward flow of water |
| D. | none of the above |
| Answer» D. none of the above | |
| 181. |
When the water table is under the base of the footing at a depth equal to half of the width of the footing, the bearing capacity of a soil is reduced to |
| A. | one-fourth |
| B. | one-half |
| C. | two-third |
| D. | three-fourth |
| Answer» C. two-third | |
| 182. |
Submerged soils are |
| A. | partially |
| B. | fully |
| Answer» C. | |
| 183. |
Talus' is a soil transported by glacial water. |
| A. | Right |
| B. | Wrong |
| Answer» C. | |
| 184. |
The specific gravity of sandy soils is |
| A. | 1.2 |
| B. | 1.8 |
| C. | 2.2 |
| D. | 2.7 |
| Answer» E. | |
| 185. |
The minimum size of grains of silts is about |
| A. | 0.0002 mm |
| B. | 0.002 mm |
| C. | 0.02 mm |
| D. | 0.2 mm |
| Answer» B. 0.002 mm | |
| 186. |
The uniformity co-efficient of soil is defined as the ratio of |
| A. | D40 to D10 |
| B. | D40 to D20 |
| C. | D50 to D10 |
| D. | D60 to D10 |
| Answer» E. | |
| 187. |
The hydraulic gradient provided at the downstream side of a hydraulic structure such as a dam, is called |
| A. | downstream gradient |
| B. | tail water gradient |
| C. | exit gradient |
| D. | any one of these |
| Answer» E. | |
| 188. |
Consolidation and compressibility of soil |
| A. | is a measure of the ability of soil to allow the water to pass through its pores |
| B. | is a measure of the ability of soil to bear stresses without failure |
| C. | deals with changes in volume of pores in a soil under load |
| D. | any one of the above |
| Answer» D. any one of the above | |
| 189. |
The unit bearing capacity of footing in sand |
| A. | decreases with depth of footing |
| B. | decreses with width of footing |
| C. | increases with depth of footing |
| D. | increases with width of footing |
| Answer» D. increases with width of footing | |
| 190. |
The critical gradient of the seepage of water |
| A. | directly proportional to void ratio |
| B. | increases with the decrease in void ratio |
| C. | inversely proportional to specific gravity |
| D. | increases with the decrease in specific gravity of soil |
| Answer» C. inversely proportional to specific gravity | |
| 191. |
The permeability of a given soil is |
| A. | directly proportional to the average grain size |
| B. | inversely proportional to the average grain size |
| C. | directly proportional to the square of the average grain size |
| D. | inversely proportional to the square of the average grain size |
| Answer» D. inversely proportional to the square of the average grain size | |
| 192. |
The ultimate net bearing capacity lay depends upon the value of cohesion. |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |
| 193. |
The compression index of the soil |
| A. | increases with the increase in liquid limit |
| B. | decreases with the increase in liquid limit |
| C. | increases with the decrease in plastic limit |
| D. | decreases with the increase in plastic limit |
| Answer» B. decreases with the increase in liquid limit | |
| 194. |
The lateral earth pressure exerted by the soil when the retaining wall moves into the soil, is known as |
| A. | earth pressure at rest |
| B. | active earth pressure |
| C. | passive earth pressure |
| D. | total earth pressure |
| Answer» D. total earth pressure | |
| 195. |
A line showing the dry density as a function of water content for soil containing no air voids, is called |
| A. | saturation line |
| B. | zero air void line |
| C. | liquid limit line |
| D. | none of these |
| Answer» B. zero air void line | |
| 196. |
The process of maintaining or improving the performance of a soil as a constructional material, usually by the use of admixtures, is known as |
| A. | soil exploration |
| B. | soil stabilisation |
| C. | soil compaction |
| D. | consolidation |
| Answer» C. soil compaction | |
| 197. |
The effective stress on the soil mass |
| A. | increases |
| B. | decreases |
| Answer» C. | |
| 198. |
Hydrometer analysis is used to determine the density of soil suspension. |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |
| 199. |
The active earth pressure of a soil is defined as the lateral pressure exerted by soil |
| A. | when it is at rest |
| B. | when the retaining wall has no movement relative to the back fill |
| C. | when the retaining wall tends to move away from the back fill |
| D. | when the retaining wall moves into the soil |
| Answer» D. when the retaining wall moves into the soil | |
| 200. |
The ratio of the unit weight of soil solids to that of water is called |
| A. | void ratio |
| B. | porosity |
| C. | specific gravity |
| D. | degree of saturation |
| Answer» D. degree of saturation | |