GATE CE topic:soil-mechanics PYQs & Answers — Page 7

Questions 61–70 of 103. Imported answers require independent review unless marked reviewed.

The soil profile at a road construction site is as shown in figure (not to scale). A large embankment is to be constructed at the site. The ground water table (GWT) is located at the surface of the clay layer, and the capillary rise in the sandy soil is negligible. The effective stress at the middle of the clay layer after the application of the embankment loading is 180 kN/m

. Take unit weight of water,

kN/m

Diagram for Civil Engineering question 45

The primary consolidation settlement (in m, round off to two decimal places) of the clay layer resulting from this loading will be

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The void ratio of a clay soil sample M decreased from 0.575 to 0.510 when the applied pressure is increased from 120 kPa to 180 kPa. For the same increment in pressure, the void ratio of another clay soil sample N decreases from 0.600 to 0.550. If the ratio of hydraulic conductivity of sample M to sample N is 0.125, then the ratio of coefficient of consolidation of sample M to sample N (round off to three decimal places) is

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Which one of the following statements is NOT correct?

Your answerChoose one option.

A clay deposit with a liquidity index greater than unity is in a state of plastic consistency.

The cohesion of normally consolidated clay is zero when triaxial test is conducted under consolidated undrained condition.

The ultimate bearing capacity of a strip foundation supported on the surface of sand soil increases in direct proportion to the width of footing.

In case of a point load, Boussinesq’s equation predicts higher value of vertical stress at a point directly beneath the load as compared to Westergaard’s equation.

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Soil deposit formed due to transportation by wind is termed as

Your answerChoose one option.

aeolian deposit

alluvial deposit

estuarine deposit

lacustrine deposit

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A sample of 500 g dry sand, when poured into a 2 litre capacity cylinder which is partially filled with water, displaces 188 cm

of water. The density of water is 1 g/cm

. The specific gravity of the sand is

Your answerChoose one option.

2.72

2.66

2.55

2.52

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Velocity of flow is proportional to the first power of hydraulic gradient in Darcy’s law. This law is applicable to

Your answerChoose one option.

laminar flow in porous media

transitional flow in porous media

turbulent flow in porous media

laminar as well as turbulent flow in porous media

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In a drained triaxial compression test, a sample of sand fails at deviator stress of 150 kPa under confining pressure of 50 kPa. The angle of internal friction (in degree, round off to the nearest integer) of the sample, is ________.

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A soil has dry unit weight of 15.5 kN/m

, specific gravity of 2.65 and degree of saturation of 72%. Considering the unit weight of water as 10 kN/m

, the water content of the soil (in %, round off to two decimal places) is ____________.

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A fully submerged infinite sand slope has an inclination of 30° with the horizontal. The saturated unit weight and effective angle of internal friction of sand are 18 kN/m³ and 38°, respectively. The unit weight of water is 10 kN/m³. Assume that the seepage is parallel to the slope. Against shear failure of the slope, the factor of safety (round off to two decimal places) is ________.

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A one-dimensional consolidation test is carried out on a standard 19 mm thick clay sample. The oedometer’s deflection gauge indicates a reading of 2.1 mm, just before removal of the load, without allowing any swelling. The void ratio is 0.62 at this stage. The initial void ratio (round off to two decimal places) of the standard specimen is ____________.

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GATE CE topic:soil-mechanics PYQs

Question 45

Question 47

Question 10

Question 10

Question 11

Question 12

Question 22

Question 22

Question 23

Question 23