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ESE CE: Soil Mechanics & Foundation Engineering Champion Quiz 5

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Question 1

If the coefficient of active earth pressure is 1/3, then what is the value of the coefficient of pressive earth pressure?

Question 2

Assertion (A):Rankine’s earth pressure theory should not be used for concrete retaining walls and Coulomb’s theory should not be used for estimating passive earth pressures.
Reason (R): Rankine’s assumed that the retaining wall has a vertical back and Coulomb assumed that the resultant reaction due to earth pressure acts at one-third the height of the wall.

Question 3

Assertion (A): Basement walls and bridge abutments are usually designed for earth pressure at rest
Reason (R): these are usually not restrained by the floor slab and by less than passive earth pressure

Question 4

Statement (I): For a cantilever retaining wall, Rankine’s theory of earth pressure may be used.
Statement (II): For a retaining wall with smooth vertical back, Rankine’s theory is appropriate.

Question 5

Consider the following statements:
1). Permeability of a soil decreases as the effective stress acting on the soil increases.
2). The presence of organic matter in the soil increases its permeability.
3). Entrapped air decreases the permeability of a soil
Which of these statements is/are correct?

Question 6

A soil has discharge velocity of 5 ×10-7 m/s and a void ratio of 0.5, its seepage velocity will be

Question 7

Consider the following statements:
1). Organic matter increases the permeability of a soil.
2). Entrapped air decreases the permeability of a soil.
Which of these statements is/are correct?

Question 8

The field density and field moisture content of a soil can be determined by
1). Core cutter method
2). Sand replacement method
3). Proctor compaction test
4). Modified proctor compaction test

Question 9

For a sandy soil with grains spherical in shape and uniform in size, what is the theoretical void ratio

Question 10

A clay sample, originally 26 mm thick at a void ratio of 1.22, was subjected to a compressive load. After the clay sample was completely consolidated, its thickness was measured to be 24 mm. what is the final void ratio?
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Jul 19ESE & GATE CE