SM UNIT 4

The un-drained test is carried out on sample of clay, silt, and peat to determine _____________

• Shear Strength of natural ground and Sensitivity

• Pore pressure

• None of the mentioned

• All of the mentioned

In an un-drained test on saturated clays, both σ1’ and σ3’ is independent of ____________

• Pore pressure

• Shear strength

• Cell pressure

• Effective pressure

The consolidated-un drained test can be performed in ___________ methods.

• 3

• 2

• 4

• 1

Which of the following cannot be obtained by using un-drained test?

• Effective stress failure envelope

• Shear strength

• sensitivity

• All of the mentioned

The change in the pore pressure during an un-drained shear can be explained by ___________

• Lateral pressure

• Effective stress

• Pore pressure parameter

• Mohr’s circle

Factor affecting pore pressure parameters is ___________

• Type of shear

• Temperature

• Nature of the fluid

• All of the mentioned

The value of pore pressure parameter, at failure for saturated clay is __________

• 1.2 to 2.5

• 2 to 3

• 0.3 to 0.7

• 0.7 to 1.3

Negative pore pressure in clay or sand is developed due to __________

• Expansion on loading

• Over loading

• Loose structure

• Compaction

If the pore pressure is measured during un-drained stage of the test, the result can be expressed in terms of __________

• C’ and φ

• cu

• None of the mentioned

• All of the mentioned

What will be the shearing resistance of a sample of clay in an unconfined compression test, falls under a load of 150 N? Take change of cross-section Af=2181.7 mm2.

• 68.75 kN/m2

• 34.38 kN/m2

• 11.35 kN/m2

• 0.6875 kN/m2