Soil Mechanics and Foundation
A tri-axial shear test is preferred to direct shear test, because

It can be performed under all three drainage conditions with complete control
Stress distribution on the failure plane, is non uniform
Precise measurement of pore pressure and change in volume during test, is not possible
None of these

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Soil Mechanics and Foundation
Coefficient of earth pressure at rest is

greater than active earth pressure but less than passive earth pressure
less than active earth pressure but greater than passive earth pressure
greater than both the active earth pressure and passive earth pressure
less than both the active and passive earth pressures

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Soil Mechanics and Foundation
Which of the following statements is correct?

Uniformity coefficient represents the shape of the particle size distribution curve.
A soil is said to be well graded if it has most of the particles of about the same size
None of these
For a well graded soil, both uniformity coefficient and coefficient of curvature are nearly unity.

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Soil Mechanics and Foundation
A cylindrical specimen of saturated soil failed under an axial vertical stress of 100kN/m2 when it was laterally unconfmed. The failure plane was inclined to the horizontal plane at an angle of 45°. The values of cohesion and angle of internal friction for the soil are respectively

0.05 N/mm² and 45°
0.2 N/mm² and 0°
0.5 N/mm² and 30°
0.05 N/mm² and 0°

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