Soil Mechanics and Foundation Engineering

291. The slope of isochrone at any point at a given time indicates the rate of change of

1. Effective stress with time
2. Effective stress with depth
3. Pore water pressure with depth
4. Pore water pressure with time

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292. The soil moisture driven off by heat, is called

1. Free water
2. Hydroscopic water
3. Gravity water
4. None of these

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293. The soil which contains finest grain particles, is

1. Coarse sand
2. Fine sand
3. Silt
4. Clay

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294. The specific gravity of Calcite is

1. 2.65
2. 2.72
3. 2.85
4. 2.9

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295. The specific gravity of quartz, is

1. 2.65
2. 2.72
3. 2.85
4. 2.9

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296. The specific gravity of sands, is approximately

1. 1.6
2. 2
3. 2.2
4. 2.6

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297. The specific yield of soil depends upon

1. Compaction of stratum
2. Distribution of pores
3. Shape and size of particles
4. All the above

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298. 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

1. H
2. √H
3. H²
4. H³

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299. The total and effective stresses at a depth of 5 m below the top level of water in a swimming pool are respectively

1. Zero and zero
2. 0.5 kg/cm² and zero
3. 0.5 kg/cm² and 0.5 kg/cm²
4. 1.0 kg/cm² and 0.5 kg/cm²

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300. The total discharge from two wells situated near to each other is

1. Sum of the discharges from individual wells
2. Less than the sum of the discharges from individual wells
3. Greater than the sum of the discharges from individual wells
4. Equal to larger of the two discharges from individual wells

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