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GATE CE: Soil Mechanics & Foundation Engineering Champion Quiz 2
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Question 1
The permissible stress in axial tension s„ in steel member on the net effective area of the section shall not exceed the following value (fy is the yield stress)
Question 2
A long slope is formed in a soil with shear strength parameters : c' = 0 and φ' = 34 °. A firm stratum lies below the slope and it is assumed that the water table may occasionally rise to the surface, with seepage taking place parallel to the slope. Use γsat = 18kN/m3 and γw = 10kN/m3. The maximum slope angle (in degrees) to ensure a factor of safety of 1.5, assuming a potential failure surface parallel to the slope, would be
Question 3
A soil is composed of solids spherical grains of identical specific gravity and diameter between 0.075 mm and 0.0075 mm. If the terminal velocity of the largest particle falling through water without flocculation if 0.5 mm/s, that for the smallest particle would be
Question 4
Two geometrically identical isolated footings, X (linear elastic) and Y (rigid), are loaded identically (shown alongside). The soil reactions will
Question 5
A fine–grained soil has 60% (by weight) silt content. The soil behaves as semi–solid when water content is between 15% and 28%. The soil behaves fluid–like when the water content is more than 40%. The ‘Activity’ of the soil is
Question 6
A field vane shear testing instrument (shown alongside) was inserted completely into a deposit of soft, saturated silty clay with the vane rod vertical such that the top of the blades were 500 mm below the ground surface. Upon application of a rapidly increasing torque about the vane rod, the soil was found to fail when the torque reached 4.6 Nm. Assuming mobilization of undrained shear strength on all failure surfaces to be uniform and the resistance mobilized on the surface of the vane rod to be negligible, what would be the peak undrained shear strength (rounded off to the nearest integer value of kPa) of the soil?
Question 7
In a shear test on cohesionless soils, if the initial void ratio is less than critical void ratio, the sample will
Question 8
Which one of the following is the appropriate triaxial test to assess the immediate stability of an unloading problem, such as an excavation of a clay slope?
Question 9
The specific gravity of a soil sample is 2.7 and its void ratio is 0.945. when it is fully saturated the moisture content of the soil will be
Question 10
A clay sample has a void ratio 0.54 in dry state. The specific gravity of soil solids is 2.7. What is the shrinkage limit of the soil?
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Sep 29ESE & GATE CE
