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201. |
The liquid limit exists in |
A. | sandy soils |
B. | gravel soils |
C. | silty soils |
D. | clays |
Answer» D. clays |
202. |
The equipotential line in a seepage through a soil medium is defined as the |
A. | path of particles of water through a saturated soil mass |
B. | line connecting points of equal head of water |
C. | flow of movement of fine particles of soil |
D. | direction of the flow particle |
Answer» B. line connecting points of equal head of water |
203. |
The coefficient of active earth pressure is always |
A. | more |
B. | less |
Answer» B. less |
204. |
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» A. sensitivity |
205. |
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» D. 32? to 37? |
206. |
The soil transported by glaciers either by ice or water is called |
A. | talus |
B. | Loess |
C. | Drift |
D. | none of these |
Answer» C. Drift |
207. |
The neutral stress is |
A. | increases |
B. | decreases |
Answer» B. decreases |
208. |
The strength of a soil is usually identified by |
A. | direct tensile stress |
B. | direct compressive stress |
C. | ultimate shear stress |
D. | effective stress |
Answer» C. ultimate shear stress |
209. |
When applying Darcy's law to soils, it assumed that the |
A. | soil is incompressible |
B. | soil is homogeneous and isotropic |
C. | flow conditions are laminar |
D. | all of these |
Answer» D. all of these |
210. |
The consolidation of a soil is defined as the |
A. | process of compression by gradual reduction of pore space under steady load |
B. | process which gives gradual decrease of water content at constant load |
C. | change in volume of soil due to expulsion of pure water under an applied load |
D. | any one of the above |
Answer» D. any one of the above |
211. |
The liquid limit minus plastic limit is termed as |
A. | flow index |
B. | plasticity index |
C. | shrinkage index |
D. | liquidity index |
Answer» B. plasticity index |
212. |
The piping failure in a hydraulic structure can be prevented by |
A. | diverting the seepage water into filter wells |
B. | increasing the creep length of flow of water |
C. | increasing the stress due to weight of the structure |
D. | all of the above |
Answer» D. all of the above |
213. |
The critical height in the stability of soil is the |
A. | minimum height at which it is possible for the sloped bank of soil to tbe stable |
B. | macimum height at which it is possible for the sloped bank of soil to be stable |
C. | minimum vertical height of the soil in an open excavation |
D. | maximum vertical height of the soil is as open excavation |
Answer» B. macimum height at which it is possible for the sloped bank of soil to be stable |
214. |
The activity of clay is defined as the ratio of |
A. | liquid limit to plastic limit |
B. | liquidity index to plasticity index |
C. | plasticity index to clay fraction |
D. | plasticity index to shrinkage index |
Answer» C. plasticity index to clay fraction |
215. |
The exit gradient of the seepage of water through a soil medium is the |
A. | slope of the flow line |
B. | slope of the equi-potential line |
C. | ration of total head to the length of seepage |
D. | ratio of the head loss to the length of seepage |
Answer» D. ratio of the head loss to the length of seepage |
216. |
The unconfined compressive strength of a very soft clay is |
A. | 10 to 25 kN/m2 |
B. | 25 to 150 kN/m2 |
C. | 150 to 400 kN/m2 |
D. | Above 400 kN/m2 |
Answer» A. 10 to 25 kN/m2 |
217. |
A soil is in a semi-solid state, if the consistency index is |
A. | zero |
B. | one |
C. | more than unity |
D. | none of these |
Answer» C. more than unity |
218. |
The unit weight of a soil at zero air voids depends upon |
A. | unit weight of water |
B. | water content |
C. | specific gravity |
D. | all of these |
Answer» D. all of these |
219. |
The maximum unit pressure that a soil can withstand without rupture in shear or without excessive settlement of the structure, is called |
A. | allowable bearing pressure |
B. | safe bearing capacity |
C. | ultimate bearing capacity |
D. | bearing capacity |
Answer» B. safe bearing capacity |
220. |
The effect of cohesion is to |
A. | decrease |
B. | increase |
Answer» A. decrease |
221. |
If a shear stress is applied on a dense sand, the shear strain caused will |
A. | increase |
B. | decrease |
C. | not effect |
Answer» A. increase |
222. |
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» B. double |
223. |
The water content of soils can be accurately determined by |
A. | sand bath method |
B. | calcium carbide method |
C. | over drying method |
D. | Pycnometer method |
Answer» C. over drying method |
224. |
The standard temperature at which the hydrometer is calibrated is |
A. | 10?C |
B. | 15?C |
C. | 20?C |
D. | 27?C |
Answer» D. 27?C |
225. |
The relation between the air content (ac) and the degree of saturation (s) is |
A. | ac = s |
B. | ac = 1 - s |
C. | ac = 1 + s |
D. | ac = 1/s |
Answer» B. ac = 1 - s |
226. |
Black cotton soils are |
A. | expensive |
B. | residual |
Answer» A. expensive |
227. |
A soil containing continuous voids is called |
A. | permeable |
B. | impermeable |
Answer» A. permeable |
228. |
The property of a soil which enables to regain its strength lost on remoulding in a short time, without change of moisture content, is called |
A. | unconfined compressive strength |
B. | sensitivity |
C. | thixotropy |
D. | relative density |
Answer» C. thixotropy |
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