Soil Mechanics and Foundation Engineering

341. Which of the following methods is most accurate for the determination of the water content of soil?

1. Oven drying method
2. Sand bath method
3. Calcium carbide method
4. Pycnometer method

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342. Which of the following soils has more plasticity index?

1. Sand
2. Silt
3. Clay
4. Gravel

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343. Which of the following statements is correct?

1. Uniformity coefficient represents the shape of the particle size distribution curve.
2. For a well graded soil, both uniformity coefficient and coefficient of curvature are nearly unity.
3. A soil is said to be well graded if it has most of the particles of about the same size
4. None of the above

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344. Which of the following types of soil is transported by gravitational forces?

1. Loess
2. Talus
3. Drift
4. Dune sand

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345. Which one of the following clays behaves like a dense sand?

1. Over-consolidated clay with a high over-consolidation ratio
2. Over-consolidated clay with a low over-consolidation ratio
3. Normally consolidated clay
4. Under-consolidated clay

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346. Which one of the following statements is true for Mohr-Coulomb envelope?

1. Coulomb suggests that the relationship between shear strength and normal stress, is adequately represented by the straight line
2. The generalised Mohr theory suggests that, though the shear stress depends on the normal stress, the relation is not linear
3. Coulomb and Mohr suggest that a definite relationship exists among the principal stress and the angle of internal friction
4. All the above

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347. Which one of the following statements is true?

1. Clays are more porous than sands
2. Pressure of organic matter in a soil decreases the bearing capacity of the soil
3. Aluminous cement is used for foundations in soils with chemical deposits
4. All the above

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348. With the increase in the amount of compaction energy

1. Optimum water content increases but maximum dry density decreases
2. Optimum water content decreases but maximum dry density increases
3. Both optimum water content and maximum dry density increase
4. Both optimum water content and maximum dry density decrease

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349. Within the consolidation process of a saturated clay

1. A gradual increase in neutral pressure and a gradual decrease in effective pressure take place and sum of the two is constant
2. A gradual decrease in neutral pressure and a gradual increase in effective pressure take place and sum of the two is constant
3. Both neutral pressure and effective pressure decrease
4. Both neutral pressure and effective pressure increase

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