McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Civil Engineering .
| 101. |
The ratio of the volume of air voids to the volume of voids, is called |
| A. | void ratio |
| B. | air content |
| C. | degree of saturation |
| D. | porosity |
| Answer» B. air content | |
| 102. |
The coefficient of earth pressure at rest for loose sand is |
| A. | more than |
| B. | less than |
| C. | same as |
| Answer» B. less than | |
| 103. |
The void ratio for saturated soil is equal to the |
| A. | sum |
| B. | difference |
| C. | product |
| D. | ratio |
| Answer» C. product | |
| 104. |
The time factor for a clay layer is |
| A. | a dimensionless parameter |
| B. | directly proportional to permeability |
| C. | directly proportional to drainage path |
| D. | none of these |
| Answer» B. directly proportional to permeability | |
| 105. |
When the soils are carried away by force of gravity, they are known as |
| A. | transported |
| B. | residual |
| Answer» A. transported | |
| 106. |
Which of the following statement is correct? |
| A. | The flow line are perpendicular to equipotential lines. |
| B. | No two flow lines or equipotential lines start from the same point. |
| C. | No two flow lines cross each other |
| D. | all of the above |
| Answer» D. all of the above | |
| 107. |
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» C. 2.25 g / cm3 and 1.25 g / cm3 | |
| 108. |
The value of permeability |
| A. | depends upon |
| B. | does not depend upon |
| Answer» A. depends upon | |
| 109. |
The consistency index is also known as relative consistency. |
| A. | True |
| B. | False |
| Answer» A. True | |
| 110. |
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» A. weight of water to the weight of solids | |
| 111. |
The direction of seepage is always |
| A. | parallel |
| B. | perpendicular |
| Answer» B. perpendicular | |
| 112. |
The void 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» C. total volume of voids to the volume of soil solids | |
| 113. |
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» A. 0.2 | |
| 114. |
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» D. all of these | |
| 115. |
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» C. soil compaction | |
| 116. |
Silt is a |
| A. | material deposited by a glacier |
| B. | soil composed of two different soils |
| C. | fine grained soil with little or no plasticity |
| D. | clay with a high percentage of the clay mineral |
| Answer» C. fine grained soil with little or no plasticity | |
| 117. |
The plastic limit exists in |
| A. | sandy soils |
| B. | gravel soils |
| C. | silty soils |
| D. | clays |
| Answer» D. clays | |
| 118. |
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» D. all of these | |
| 119. |
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» B. less in the centre than at the edges | |
| 120. |
The critical gradient of the seepage of water |
| A. | increases |
| B. | decreases |
| C. | does not change |
| Answer» A. increases | |
| 121. |
The shrinkage index is equal to |
| A. | liquid limit + plastic limit |
| B. | plastic limit - liquid limit |
| C. | liquid limit - shrinkage limit |
| D. | shrinkage limit - liuid limit |
| Answer» C. liquid limit - shrinkage limit | |
| 122. |
A soil having uniformity co-efficient more than 10, is called |
| A. | uniform soil |
| B. | poor soil |
| C. | well graded soil |
| D. | coarse soil |
| Answer» C. well graded soil | |
| 123. |
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» C. coefficient of permeability | |
| 124. |
The rate of consolidation |
| A. | increases |
| B. | decreases |
| C. | does not change |
| Answer» A. increases | |
| 125. |
The moisture contents of a clayey soil is gradually decreased from a large value. The correct sequence of the occurrence of the limits will be |
| A. | liquid limit, plastic limit and shrinkage limit |
| B. | plastic limit, liquid limit and shrinkage limit |
| C. | shrinkage limit, plastic limit and liquid limit |
| D. | plastic limit, shrinkage limit and liquid limit |
| Answer» A. liquid limit, plastic limit and shrinkage limit | |
| 126. |
Black cotton soil |
| A. | is inorganic in nature |
| B. | contains large percentage of clay mineral |
| C. | exhibits high compressibility |
| D. | all of these |
| Answer» D. all of these | |
| 127. |
The density of sand at which there is no change in volume under the influence of shearing strain produced due to shear stress, is called |
| A. | relative density |
| B. | apparent density |
| C. | critical density |
| D. | any one of these |
| Answer» C. critical density | |
| 128. |
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» D. the size ranges of their voids will be different | |
| 129. |
For engineering purposes, soil is defined as |
| A. | the loose mantle at the surface of the earth which favours the growth of plant |
| B. | a natural aggregate of mineral grains, loose or moderately cohesive, inorganic or organic in nature |
| C. | a disintegrated rock |
| D. | all of the above |
| Answer» B. a natural aggregate of mineral grains, loose or moderately cohesive, inorganic or organic in nature | |
| 130. |
The earth pressure at rest is proportional to ? / 1 - ?, where ? = Poisson's ratio of the soil. |
| A. | Right |
| B. | Wrong |
| Answer» A. Right | |
| 131. |
If the soil below the base of the footing is dry or moist, the confining pressure is approximately |
| A. | equal to |
| B. | double |
| C. | three times |
| D. | four times |
| Answer» B. double | |
| 132. |
The suantity of seepage of water in a soil medium is |
| A. | directly proportional to the head of water at upstream |
| B. | inversely proportional to the head of water at upstream |
| C. | directly proportional to the coefficient of permeability |
| D. | inversely proportional to the coefficient of permeability |
| Answer» C. directly proportional to the coefficient of permeability | |
| 133. |
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» B. 57 kN/m2 | |
| 134. |
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» D. all of these | |
| 135. |
The total stress is equal to the sum of the effective stress and pore water pressure. |
| A. | True |
| B. | False |
| Answer» A. True | |
| 136. |
Which of the following is highly permeable? |
| A. | Gravel |
| B. | Sand mixture |
| C. | Coarse sand |
| D. | Clay |
| Answer» A. Gravel | |
| 137. |
The smallest sieve size according to Indian standards is |
| A. | 0.0045 mm |
| B. | 0.045 mm |
| C. | 0.45 mm |
| D. | 0.154 mm |
| Answer» B. 0.045 mm | |
| 138. |
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» D. none of these | |
| 139. |
According to Indian standards, the dispersing solution used in pipette method, for the determination of size of particle consists of |
| A. | 7 g sodium carbonate, 43 g sodium hexameta-phosphate and 1 litre distilled water |
| B. | 7 g sodium carbonate, 33 g sodium hexameta-phosphate and 1 litre distilled water |
| C. | 7 g sodium carbonate, 23 g sodium hexameta-phosphate and 1 litre distilled water |
| D. | any one of the above |
| Answer» B. 7 g sodium carbonate, 33 g sodium hexameta-phosphate and 1 litre distilled water | |
| 140. |
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» A. 15?20 | |
| 141. |
The water content is the ratio of weight of water to the weight of solids. |
| A. | Yes |
| B. | No |
| Answer» A. Yes | |
| 142. |
The ratio of the liquid limit minus the natural content of a soil to its plasticity index, is known as |
| A. | toughness index |
| B. | liquidity index |
| C. | flow index |
| D. | relative consistency |
| Answer» D. relative consistency | |
| 143. |
The useful method of finding the shear strength of very plastic cohesive soils is by means of |
| A. | cone test |
| B. | penetration test |
| C. | vane shear test |
| D. | torsional shear test |
| Answer» C. vane shear test | |
| 144. |
The ratio of settlement at any time (t) to the final settlement is known as |
| A. | compression index |
| B. | coefficient of consolidation |
| C. | degree of consolidation |
| D. | none of these |
| Answer» C. degree of consolidation | |
| 145. |
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» D. 1 / ko | |
| 146. |
The water content in a soil at which just shear strength develops is called |
| A. | liquid limit |
| B. | plastic limit |
| C. | elastic limit |
| D. | shrinkage limit |
| Answer» A. liquid limit | |
| 147. |
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» C. 78% | |
| 148. |
The plasticity index is the ratio of liquidity index and flow index. |
| A. | Right |
| B. | Wrong |
| Answer» B. Wrong | |
| 149. |
By an agriculturist, soil is defined as |
| A. | the loose mantle at the surface of the earth which favours the growth of plant |
| B. | a natural aggregate of mineral grains, loose or moderately cohesive, inorganic or organic in nature |
| C. | a disintegrated rock |
| D. | none of the above |
| Answer» A. the loose mantle at the surface of the earth which favours the growth of plant | |
| 150. |
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» B. 0.5 | |
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