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.
| 101. |
The coefficient of volume compressibility is |
| A. | directly proportional to the void ratio |
| B. | inversely proportional to the void ratio |
| C. | directly proportional to the coefficient of compressibility |
| D. | inversely proportional to the coefficient of compressibility |
| Answer» D. inversely proportional to the coefficient of compressibility | |
| 102. |
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» C. ac = 1 + s | |
| 103. |
A soil containing continuous voids is called |
| A. | permeable |
| B. | impermeable |
| Answer» B. impermeable | |
| 104. |
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» D. relative density | |
| 105. |
The average velocity of flow that will take place through the total cross-sectional area of soil under unit hydraulic gradient is called |
| A. | uniformity coefficient |
| B. | Darcy's coefficient |
| C. | coefficient of permeability |
| D. | terminal velocity |
| Answer» D. terminal velocity | |
| 106. |
The maximum permissible exit gradient is the critical gradient divided by a factor of safety. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 107. |
When water content in a soil is reduced beyond the shrinkage limit, the soil will be in a |
| A. | solid state |
| B. | liquid state |
| C. | semi-solid state |
| D. | plastic state |
| Answer» B. liquid state | |
| 108. |
Black cotton soils are |
| A. | expensive |
| B. | residual |
| Answer» B. residual | |
| 109. |
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» E. | |
| 110. |
The permissible exit gradient for safety against piping which endanger the stability of a hydraulic structure, should be |
| A. | 0.2 |
| B. | 0.4 |
| C. | 0.6 |
| D. | 0.8 |
| Answer» B. 0.4 | |
| 111. |
If the pores of a soil are completely full of air only, the soil is said to be |
| A. | wet soil |
| B. | dry soil |
| C. | fully saturated soil |
| D. | partially saturated soil |
| Answer» C. fully saturated soil | |
| 112. |
When the particles of soil are oriented 'edge to edge' or 'edge to face' with respect to one another, the soil is said to have |
| A. | single grained structure |
| B. | double grained structure |
| C. | honey-combed structure |
| D. | flocculent structure |
| Answer» E. | |
| 113. |
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» C. flow of movement of fine particles of soil | |
| 114. |
The soil transported by glaciers either by ice or water is called |
| A. | talus |
| B. | Loess |
| C. | Drift |
| D. | none of these |
| Answer» D. none of these | |
| 115. |
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» D. plasticity index to shrinkage index | |
| 116. |
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» E. | |
| 117. |
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» C. minimum vertical height of the soil in an open excavation | |
| 118. |
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» B. 25 to 150 kN/m2 | |
| 119. |
The effect of cohesion is to |
| A. | decrease |
| B. | increase |
| Answer» B. increase | |
| 120. |
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» D. Pycnometer method | |
| 121. |
The liquid limit exists in |
| A. | sandy soils |
| B. | gravel soils |
| C. | silty soils |
| D. | clays |
| Answer» E. | |
| 122. |
If a shear stress is applied on a dense sand, the shear strain caused will |
| A. | increase |
| B. | decrease |
| C. | not effect |
| Answer» B. decrease | |
| 123. |
The liquid limit minus plastic limit is termed as |
| A. | flow index |
| B. | plasticity index |
| C. | shrinkage index |
| D. | liquidity index |
| Answer» C. shrinkage index | |
| 124. |
The vertical deformation of soil mass consists of |
| A. | deformation of soil grains |
| B. | compression of pore fluid |
| C. | reduction of pore space |
| D. | all of these |
| Answer» E. | |
| 125. |
The effective stress on the soil is due to the |
| A. | external load acting on the soil |
| B. | weight of the soil particles |
| C. | weight of water present in soil pores |
| D. | both (a) and (b) |
| Answer» E. | |
| 126. |
For a perfectly dry soil mass, the degree of saturation is zero |
| A. | Yes |
| B. | No |
| Answer» B. No | |
| 127. |
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» E. | |
| 128. |
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» D. none of these | |
| 129. |
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» E. | |
| 130. |
The unit weight of soil mass is expressed in |
| A. | kg / m2 |
| B. | kg / m3 |
| C. | N / m2 |
| D. | N / m3 |
| Answer» E. | |
| 131. |
The ratio of the volume of voids to the total volume of soil mass is called |
| A. | water content ratio |
| B. | porosity |
| C. | void ratio |
| D. | degree of saturation |
| Answer» C. void ratio | |
| 132. |
The standard temperature at which the hydrometer is calibrated is |
| A. | 10?C |
| B. | 15?C |
| C. | 20?C |
| D. | 27?C |
| Answer» E. | |
| 133. |
The high density of the soil placed in a fill is desired in order to |
| A. | increase its shear resistance |
| B. | reduce future settlements |
| C. | reduce percolation through the fill |
| D. | all of these |
| Answer» E. | |
| 134. |
The dry density of a soil is 1.5 g/cm3. If the saturation water content is 50%, then its saturated density and submerged density will respectively be |
| A. | 1.5 g / cm3 and 1.0 g / cm3 |
| B. | 2.0 g / cm3 and 1 g / cm3 |
| C. | 2.25 g / cm3 and 1.25 g / cm3 |
| D. | 2.50 g / cm3 and 1.50 g / cm3 |
| Answer» D. 2.50 g / cm3 and 1.50 g / cm3 | |
| 135. |
When the hydrometer analysis is performed, it requires correction for |
| A. | temperature only |
| B. | meniscus only |
| C. | dispersing agent only |
| D. | all of these |
| Answer» E. | |
| 136. |
Bulk density of a soil is defined as the ratio of |
| A. | total mass of soil to the total volume of soil |
| B. | weight of water to the weight of solids |
| C. | unit weight of solids to the unit weight of water |
| D. | weight of solid grains to the volume of solids |
| Answer» B. weight of water to the weight of solids | |
| 137. |
When the water table is close to the ground surface, the bearing capacity of a soil is reduced to |
| A. | one-fourth |
| B. | one-half |
| C. | two-third |
| D. | three-fourth |
| Answer» E. | |
| 138. |
The process of obtaining increased density of soil in a fill by reduction of its pore space by the expulsion of air, is known as |
| A. | soil exploration |
| B. | soil stabilisation |
| C. | soil compaction |
| D. | consolidation |
| Answer» D. consolidation | |
| 139. |
A sample of soil has liquid limit 45%, plastic limit 25%, shrinkage limit 17% and natural moisture content 30%. The consistency index of the soil is |
| A. | 15?20 |
| B. | 13?20 |
| C. | 8?20 |
| D. | 5?20 |
| Answer» B. 13?20 | |
| 140. |
The difference between maximum void ratio and minimum void ratio of a sand sample is 0.30. If the relative density of this sample is 66.6% at a void ratio of 0.40, then the void ratio of this sample at its loosest state will be |
| A. | 0.4 |
| B. | 0.6 |
| C. | 0.7 |
| D. | 0.75 |
| Answer» C. 0.7 | |
| 141. |
A sample of clay and a sample of sand have the same specific gravity and void ratio. Their pemeabilities will differ because |
| A. | their porosities will be different |
| B. | their densities will be different |
| C. | their degrees of saturation will be different |
| D. | the size ranges of their voids will be different |
| Answer» E. | |
| 142. |
The bearing capacity of a soil |
| A. | increases |
| B. | decreases |
| C. | does not change |
| Answer» B. decreases | |
| 143. |
If the coefficient of passive earth pressure is 1/3, then the coefficient of active earth pressure is |
| A. | 1?3 |
| B. | 1 |
| C. | 3?2 |
| D. | 3 |
| Answer» D. 3 | |
| 144. |
The lateral earth pressure is |
| A. | directly proportional to the depth of soil |
| B. | inversely proportional to the depth of soil |
| C. | directly proportional to the squre of the depth of soil |
| D. | inversely proportional to the square of the depth of soil |
| Answer» D. inversely proportional to the square of the depth of soil | |
| 145. |
According to Terzaghi's equation, the bearing capacity of strip footing resting on cohesive soil (c = 10 kN/m2) per unit depth and unit width (assume Nc as 5.7) is |
| A. | 47 kN/m2 |
| B. | 57 kN/m2 |
| C. | 67 kN/m2 |
| D. | 77 kN/m2 |
| Answer» C. 67 kN/m2 | |
| 146. |
The net soil pressure is obtained by multiplying the net ultimate bearing capacity of soil to the factor of safety. |
| A. | Right |
| B. | Wrong |
| Answer» C. | |
| 147. |
The coefficient of active earth pressure is always |
| A. | more |
| B. | less |
| Answer» C. | |
| 148. |
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» C. ultimate bearing capacity | |
| 149. |
The earth pressure at rest 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» C. when the retaining wall tends to move away from the back fill | |
| 150. |
Glacial 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. | none of these |
| Answer» E. | |