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GATE 2023 Soil Mechanics & Foundation Engineering Evaluation Quiz 13
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Question 1
A soil sample has liquid limit of 45% and a plasticity index of 20%/. Soil will be classified as:
Question 2
What will be the coefficient of consolidation of soil if the coefficient of volume change of the soil is 4.45 × 10-4 m2/kN and the coefficient of permeability is 3.45 × 10-2 cm/s?
Question 3
A 3m thick soil stratum has coefficient of permeability of 3 × 10–7 m/sec. A separate test gave porosity 40% and bulk unit weight 21 kN/m3 at a moisture content of 31%. The flow (in terms of discharge per unit area) required to maintain the critical condition will be
Take γw = 10 kN/m3
Take γw = 10 kN/m3
Question 4
A 1.5 m layer of soil, having specific gravity of 2.65 and porosity of 0.41, is subjected to an upward seepage head of 2 m. What depth of coarse sand would be required above the existing soil to provide a factor of safety of 2 against piping? The coarse sand has the same porosity and sp. gravity as the soil and there is negligible head loss in sand.
Question 5
The zero air void line shows: -
Question 6
A soil strata having thickness 7 m was subjected to a surcharge having intensity 264 kN/m2. Now the surcharge is removed and a building is constructed on the same strata which is transferring a load of 145 kN per square meter area on soil. If the water table lies 1 m below the ground water table and dry and saturated unit weight of soil is 13 .5 kN/m3 and 19 .5 kN/m3 respectively, the over consolidation ratio of the soil is
Question 7
In a experiment for the determination of the shrinkage limit the following observation were taken.
Volume of saturated soil = 9.75ml
Mass of saturated soil=16.5gm
Volume of dry soil after shrinkage =5.4ml
Mass of dry soil after shrinkage = 10.9gm
Then shrinkage limit of the sample was.
Volume of saturated soil = 9.75ml
Mass of saturated soil=16.5gm
Volume of dry soil after shrinkage =5.4ml
Mass of dry soil after shrinkage = 10.9gm
Then shrinkage limit of the sample was.
Question 8
Due to an emergency, a modular oxygen production plant is set up inside the boundary of a hospital. The plant produces a surcharge of 28.32 kN/m2 at the surface of the ground. The site Consist of a 7m clay layer that is resting on an impervious rock. The saturated unit weight of the clay is 21 kN/m2. The water table is at the surface. What will be the effective stress at the bottom of the clay layer after the placing of a plant (in kN/m2)
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Jun 23ESE & GATE CE
