McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Civil Engineering .
| 151. |
The internal molecular attraction of a soil, the cohesion |
| A. | Decreases as the moisture content increases |
| B. | Increases as the moisture content decreases |
| C. | Is more in well compacted clays |
| D. | Depends upon the external applied load |
| Answer» C. Is more in well compacted clays | |
| 152. |
Which of the following is a measure of particle size range? |
| A. | Effective size |
| B. | Uniformity coefficient |
| C. | Coefficient of curvature |
| D. | None of the above |
| Answer» B. Uniformity coefficient | |
| 153. |
If Nf, Nd and H are total number flow channels, total number of potential drops and total hydraulic head differences respectively, the discharge q through the complete flow is given by (where K is a constant) |
| A. | q = (Nf/Nd) |
| B. | q = KH (Nd/(Nf) |
| C. | q = KH (Nf/Nd) |
| D. | q = KH Nf/Nd) |
| Answer» C. q = KH (Nf/Nd) | |
| 154. |
A failure wedge develops if a retaining wall |
| A. | Moves away from the backfill |
| B. | Moves towards the backfill |
| C. | Sinks downwards |
| D. | Stresses equally by vertical and horizontal forces |
| Answer» A. Moves away from the backfill | |
| 155. |
The admixture of coarser particles like sand or silt to clay causes |
| A. | Decrease in liquid limit and increase in plasticity index |
| B. | Decrease in liquid limit and no change in plasticity index |
| C. | Decrease in both liquid limit and plasticity index |
| D. | Increase in both liquid limit and plasticity index |
| Answer» C. Decrease in both liquid limit and plasticity index | |
| 156. |
A partially saturated sample of soil has a unit weight of 2.0 g/cm3 and specific gravity of soil particles is 2.6. If the moisture content in the soil is 20%, the degree of saturation is |
| A. | 20 % |
| B. | 77 % |
| C. | 92 % |
| D. | None of these |
| Answer» C. 92 % | |
| 157. |
The shearing strength of a cohesion-less soil depends upon |
| A. | Dry density |
| B. | Rate of loading |
| C. | Confining pressure |
| D. | Nature of loading |
| Answer» C. Confining pressure | |
| 158. |
Sand particles are made of |
| A. | Rock minerals |
| B. | Kaolinite |
| C. | Illite |
| D. | Montmorillonite |
| Answer» A. Rock minerals | |
| 159. |
The water content of soil is defined as the ratio of |
| A. | Volume of water to volume of given soil |
| B. | Volume of water to volume of voids in soil |
| C. | Weight of water to weight of air in voids |
| D. | Weight of water to weight of solids of given mass of soil |
| Answer» D. Weight of water to weight of solids of given mass of soil | |
| 160. |
A critical hydraulic gradient may occur when |
| A. | Flow is in upward direction |
| B. | Seepage pressure is in upward direction |
| C. | Effective pressure is zero |
| D. | All the above |
| Answer» D. All the above | |
| 161. |
Which of the following methods is best suited for determination of permeability of coarsegrained soils? |
| A. | Constant head method |
| B. | Falling head method |
| C. | Both the above |
| D. | None of the above |
| Answer» A. Constant head method | |
| 162. |
Back fill with a sloping surface exerts a total active pressure Pa on the wall of height H and acts at |
| A. | H/4 above the base parallel to base |
| B. | H/2 above the base parallel to base |
| C. | H/3 above the base parallel to base |
| D. | H/5 above the base parallel to base |
| Answer» C. H/3 above the base parallel to base | |
| 163. |
The slope of isochrone at any point at a given time indicates the rate of change of |
| A. | Effective stress with time |
| B. | Effective stress with depth |
| C. | Pore water pressure with depth |
| D. | Pore water pressure with time |
| Answer» C. Pore water pressure with depth | |
| 164. |
The ratio of the volume of water present in a given soil mass to the total volume of its voids, is known |
| A. | Porosity |
| B. | Void ratio |
| C. | Percentage voids |
| D. | Degree of saturation |
| Answer» D. Degree of saturation | |
| 165. |
A soil has bulk density 2.30 g/cm3 and water content 15 per cent, the dry density of the sample, is |
| A. | 1.0 g/cm2 |
| B. | 1.5 g/cm3 |
| C. | 2.0 g/cm3 |
| D. | 2.5 g/cm3 |
| Answer» C. 2.0 g/cm3 | |
| 166. |
The total active earth pressure due to dry back fill with no surcharge, acts at H/3 above the base of the wall and is directly proportional to |
| A. | H |
| B. | H |
| C. | H2 |
| D. | H3 |
| Answer» C. H2 | |
| 167. |
Coefficient of consolidation for clays normally |
| A. | Decreases with increase in liquid limit |
| B. | Increases with increase in liquid limit |
| C. | First increases and then decreases with increase in liquid limit |
| D. | Remains constant at all liquid limits |
| Answer» A. Decreases with increase in liquid limit | |
| 168. |
The maximum dry density upto which any soil can be compacted depends upon |
| A. | Moisture content only |
| B. | Amount of compaction energy only |
| C. | Both moisture content and amount of compaction energy |
| D. | None of the above |
| Answer» C. Both moisture content and amount of compaction energy | |
| 169. |
For determine the specific gravity of soil solids, using a pycnometer of 500 cc., the following data is available : Weight of dry empty pycnometer = 125 g Weight of dried soil and pycnometer = 500 g Weight of dried soil and distilled = 850 g water filled in pycnometer up to top The specific gravity of soil solids, is |
| A. | 2.0 |
| B. | 2.25 |
| C. | 2.50 |
| D. | 2.75 |
| Answer» C. 2.50 | |
| 170. |
If there is no impervious boundary at the bottom of a hydraulic structure, stream lines tend to follow: |
| A. | A straight line |
| B. | A parabola |
| C. | A semi-ellipse |
| D. | A semi-circle |
| Answer» C. A semi-ellipse | |
| 171. |
If a cohesive soil specimen is subjected to a vertical compressive load, the inclination of the cracks to the horizontal is |
| A. | 90° |
| B. | 45° |
| C. | 22.5° |
| D. | 0° |
| Answer» B. 45° | |
| 172. |
The Westergaard analysis is used for |
| A. | Sandy soils |
| B. | Cohesive soils |
| C. | Stratified soils |
| D. | Clayey soils |
| Answer» C. Stratified soils | |
| 173. |
Cohesive soils are generally |
| A. | Plastic and also compressible |
| B. | Elastic and also compressible |
| C. | Plastic but incompressible |
| D. | None of these |
| Answer» A. Plastic and also compressible | |
| 174. |
The ratio of the volume of voids to the total volume of the given soil mass, is known |
| A. | Porosity |
| B. | Specific gravity |
| C. | Void ratio |
| D. | Water content |
| Answer» A. Porosity | |
| 175. |
The total weight of a pycnometer with water and oven dried soil 20 ( g) is 1600 g. The pycnometer filled with water alone weighs 1500 g. The specific gravity of the soil, is |
| A. | 1.0 |
| B. | 1.5 |
| C. | 2.0 |
| D. | 2.5 |
| Answer» C. 2.0 | |
| 176. |
In the plate loading test for determining the bearing capacity of soil, the size of square bearing plate should be |
| A. | Less than 300 mm |
| B. | Between 300 mm and 750 mm |
| C. | Between 750 mm and 1 m |
| D. | Greater than 1 m |
| Answer» B. Between 300 mm and 750 mm | |
| 177. |
If the specific gravity of a soil particle of 0.05 cm diameter is 2.67, its terminal velocity while settling in distilled water of viscosity, 0.01 poise, is |
| A. | 0.2200 cm/sec |
| B. | 0.2225 cm/sec |
| C. | 0.2250 cm/sec |
| D. | 0.2275 cm/sec |
| Answer» D. 0.2275 cm/sec | |
| 178. |
The shear strength in plastic undrained clay, is due to |
| A. | Inter-granular friction |
| B. | Internal friction |
| C. | Cohesion |
| D. | None of these |
| Answer» C. Cohesion | |
| 179. |
A fully saturated soil is said to be |
| A. | One phase system |
| B. | Two phase system with soil and air |
| C. | Two phase system with soil and water |
| D. | Three phase system |
| Answer» C. Two phase system with soil and water | |
| 180. |
If the volume of voids is equal to the volume of solids in a soil mass, then the values of porosity and voids ratio respectively are |
| A. | 1.0 and 0.0 |
| B. | 0.0 and 1.0 |
| C. | 0.5 and 1.0 |
| D. | 1.0 and 0.5 |
| Answer» C. 0.5 and 1.0 | |
| 181. |
The compressibility of clays is caused due to: |
| A. | Expulsion of double layer water from in between the grains |
| B. | Sliping of particles to new positions of greater density |
| C. | Bending of particles as elastic sheets |
| D. | All the above |
| Answer» D. All the above | |
| 182. |
Sedimentation analysis is based on the assumption: |
| A. | Soil particles are spherical |
| B. | Particles settle independent of other particles |
| C. | Walls of the jar do not affect the settlement |
| D. | All the above |
| Answer» D. All the above | |
| 183. |
A pycnometer is used to determine |
| A. | Water content and voids ratio |
| B. | Specific gravity and dry density |
| C. | Water content and specific gravity |
| D. | Voids ratio and dry density |
| Answer» C. Water content and specific gravity | |
| 184. |
The vane shear test is used for the in-situ determination of the undrained strength of the intact fully saturated |
| A. | Sands |
| B. | Clays |
| C. | Gravels |
| D. | Highly organic soil |
| Answer» B. Clays | |
| 185. |
When the plastic limit of a soil is greater than the liquid limit, then the plasticity index is reported |
| A. | Negative |
| B. | Zero |
| C. | Non-plastic (NP) |
| D. | 1 |
| Answer» B. Zero | |
| 186. |
Flow net is used for the determination of |
| A. | Quantity of seepage |
| B. | Hydrostatic pressure |
| C. | Seepage pressure |
| D. | All the above |
| Answer» D. All the above | |
| 187. |
The inventor of the term soil mechanics, was |
| A. | Kray |
| B. | Dr. Karl Terzaghi |
| C. | Leygue |
| D. | Fellenius |
| Answer» B. Dr. Karl Terzaghi | |
| 188. |
Highway Research Board (HRB) classification of soils is based on |
| A. | Particle size composition |
| B. | Plasticity characteristics |
| C. | Both particle size composition and plasticity characteristics |
| D. | None of the above |
| Answer» C. Both particle size composition and plasticity characteristics | |
| 189. |
Stoke's law does not hold good if the size of particle is smaller than |
| A. | 0.0002 mm |
| B. | 0.002 mm |
| C. | 0.02 mm |
| D. | 0.2 mm |
| Answer» A. 0.0002 mm | |
| 190. |
Quick sand is a |
| A. | Type of sand |
| B. | Flow condition occurring in cohesive soils |
| C. | Flow condition occurring in cohesion -less soils |
| D. | Flow condition occurring in both cohesive and cohesion-less soils |
| Answer» A. Type of sand | |
| 191. |
Pick up the correct statement from the following: |
| A. | O.M.C. refers to the moisture corresponding to the maximum point on the moisture content dry density curve |
| B. | The line which shows moisture content dry density relation for soil containing a constant percentage of air voids, is known as air void line |
| C. | The free fall of hammer for compaction is 30.5 cm |
| D. | All the above |
| Answer» D. All the above | |
| 192. |
A saturated soil sample has water content of 40% and specific gravity of soil particles 2.7. The void ratio of the soil, is |
| A. | 0.4 |
| B. | 0.52 |
| C. | 1.08 |
| D. | None of these |
| Answer» C. 1.08 | |
| 193. |
The total discharge from two wells situated near to each other is |
| A. | Sum of the discharges from individual wells |
| B. | Less than the sum of the discharges from individual wells |
| C. | Greater than the sum of the discharges from individual wells |
| D. | Equal to larger of the two discharges from individual wells |
| Answer» B. Less than the sum of the discharges from individual wells | |
| 194. |
A sample of saturated soil has 30% water content and the specific gravity of soil grains is 2.6. The dry density of the soil mass in g/cm3, is |
| A. | 1.47 |
| B. | 1.82 |
| C. | 1.91 |
| D. | None of these |
| Answer» D. None of these | |
| 195. |
Compressibility of sandy soils is |
| A. | Almost equal to that of clayey soils |
| B. | Much greater than that of clayey soils |
| C. | Much less than that of clayey soils |
| D. | None of the above |
| Answer» C. Much less than that of clayey soils | |
| 196. |
Depending upon the properties of a material, the failure envelope may |
| A. | Be either straight or curved |
| B. | Pass through the origin of stress |
| C. | Intersect the shear stress axis |
| D. | All the above |
| Answer» D. All the above | |
| 197. |
The maximum pressure which a soil can carry without shear failure, is called |
| A. | Safe bearing capacity |
| B. | Net safe bearing capacity |
| C. | Net ultimate bearing capacity |
| D. | Ultimate bearing capacity |
| Answer» A. Safe bearing capacity | |
| 198. |
In a deposit of normally consolidated clay |
| A. | Effective stress increases with depth but water content of soil and undrained strength decrease with depth |
| B. | Effective stress and water content increase with depth but undrained strength decreases with depth |
| C. | Effective stress and undrained strength increase with depth but water content decreases with depth |
| D. | Effective stress, water content and undrained strength decrease with depth |
| Answer» C. Effective stress and undrained strength increase with depth but water content decreases with depth | |
| 199. |
A moist soil sample weighing 108 g has a volume of 60 cc. If water content is 25% and value of G = 2.52, the void ratio is |
| A. | 0.55 |
| B. | 0.65 |
| C. | 0.75 |
| D. | 0.80 |
| Answer» C. 0.75 | |
| 200. |
For slopes of limited extent the surface of slippage, is usually along |
| A. | A parabolic arc |
| B. | An elliptical arc |
| C. | A straight line |
| D. | A circular arc |
| Answer» D. A circular arc | |
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