GATE CE Exam : Soil Mechanics & Foundation Engineering - Mock Test 2

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Question 1

The maximum pressure at the base of foundation which can be applied without shear failure is known as :

Question 2

The maximum unit pressure that a soil can withstand without rupture in shear or with excessive settlement of structure is called

Question 3

The property of a soil due to which the loss in shear strength caused by remoulding can be regained with the time is known as:

Question 4

The void ratio of a soil is 0.59, water content is given as 0.1, assuming G as 2.76, the degree of saturation of the soil is:

Question 5

Match List-I (Soil classification symbol) with List-II (Soil property) and select the correct answer using the codes given below the lists: List-I A- GW B- SW C- ML D- CL List-II 1- Soil having uniformity coefficient > 6 2- Soil having uniformity coefficient > 4 3- Clay having low compressibility 4- Silt having low compressibility

Question 6

An unit volume of a mass of saturated soil is subjected to horizontal seepage. The saturated unit weight is 22 kN/m^{3} and the hydraulic gradient is 0.3. The resultant body force on the soil mass is

Question 7

Compaction by vibratory roller is the best method of compaction in case of

Question 8

The moisture content of soil in the root zone of an agricultural crop at certain stage is found to be 0.05. The field capacity of the soil is 0.15. The root zone depth is 1.1 m. The consumptive use of crop at this stage is 2.5 mm/day and there is no precipitation during this period. Irrigation efficiency is 65%. It is intended to raise the moisture content to the field capacity in 8 days through irrigation. The necessary depth of irrigation is (γ_{d} = 1.5)

Question 9

The water table at a location is at the ground surface and the saturated unit weight of the soil is 22 kN/m^{3}. If due to heavy precipitation, the water level rises to 1.5 m above the ground level, the increase in the vertical effective stress (in kN/m^{2}) at a point 1.5 m below the ground surface will be [Take γ_{w} = 10 kN/m^{3}]

Question 10

Determine the ultimate bearing capacity (in kN/m^{2}) of a strip footing 2 m in width, with its base at a depth of 1.5 m below ground surface and resting on a saturated clay soil in undrained loading condition with the following properties Take γ_{w} = 10 kN/m^{3}, the natural water table is at 1 m depth. [Use Terzaghi theory and Ignore depth factors]

Question 11

A Concentrated load of 50 kN acts on the surface of ground. The increase in vertical stress directly below the load at a depth of 4 m will be (Value of influence factor is 0.48)

Question 12

What is the intensity of active earth pressure at a depth of 10.0 m in dry sand with an angle of shearing resistance of 30^{o} and unit weight of 18 kN/m^{3}?

Question 13

A sand sample has a bulk density of 20 kN/m^{3} and a degree of saturation of 70%. If the specific gravity of soil grains is 2.65, the value of critical hydraulic gradient for the soil will be

Question 14

A sample of dry sand has a volume of 1000 ml in its natural state. Its minimum volume when compacted is 750 ml. When gently poured into a measuring cylinder, its possible maximum volume is 1320 ml. what is the relative density?

Question 15

The mass specific gravity of a fully saturated specimen of clay having a water content of 35% is 1.90. On oven drying, the mass specific gravity drops to 1.75. The specific gravity of clay particles and the shrinkage limit are respectively

Question 16

The in-situ void ratio of a granular soil deposit is 0.50. The maximum and minimum void ratio of the soil were determined to be 0.75 and 0.35, G_{S} = 2.67. Determine the relative density and relative compaction (in %).

Question 17

In a standard proctor test, 1.8 kg of moist soil was filling the mould (volume = 0.944 cc) after compaction. A soil sample weighing 23 g was taken from the mould and oven dried for 24 hours at a temperature of 110 °C. Weight of the dry sample was found to be 20 g. Specific gravity of soil solids is G = 2.7. The theoretical maximum value of the dry unit weight of the soil at that water content is equal to

Question 18

Compaction of an embankment is carried out in 500 mm thick layers. The rammer used for compaction has a foot area of 0.05 sq. m and the energy imparted in every drop of rammer is 400 Nm. Assuming 50% more energy in each pass over the compacted area due to overlap, the number of passes required to develop compactive energy equivalent to Indian Standard Proctor Test for each layer would be

Question 19

A group of 9 piles, 10 m long is used as a foundation for a bridge pier. The piles used are 30 cm in diameter with centre to centre spacing of 0.9 m. The sub soil consists of clay with unconfined compressive strength of 1.5 kg/cm^{2}. Determine the efficiency neglecting bearing action. [Take adhesion factor = 0.6]

Question 20

A plate load test is carried out on a 300 mm × 300 mm plate placed at 2 m below the ground level to determine the bearing capacity of a 2m × 2m footing placed at same depth of 2m on a homogenous sand deposit extending 10 m below ground. The ground water table is 3m below the footing level. Which of the following factors does not require a correction to the bearing capacity determined based on the load test?