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Soil-mechanics Questions Set 25:

Quiz Mode

A soil sample has a dry unit weight of 1.2 g/cm³ and a void ratio of 0.7. Calculate the specific gravity of the soil.

2.40

2.04

2.44

2.6

Solution:

A sand deposit has a porosity of 0.3 and its specific gravity is 2.5. The critical hydraulic gradient to cause sand boiling in the stratum will be

1.5

1.25

1.05

1.67

Solution:

Compaction by vibratory roller is the best method of compaction in case of

Moist silty sand

Well graded dry sand

Clay of medium compressibility

Silt of high compressibility

Solution:

Deposit with flocculated structure is formed when

clay particles settle on sea bed

clay particles settle on fresh water lake bed

sand particles settle on river bed

sand particles settle on sea bed

Solution:

Which of the following equations is correct?

Consistency index - Liquidity index = 1

Consistency index + Liquidity index = 1

Consistency index ÷ Liquidity index = 1

Consistency index ÷ Liquidity index < 1

Solution:

Which type of ground anchor (G.A) is most suitable for coarse granular soils and weak fissured rock?

Post-grouted G.A

Under-reamed G.A

Straight shaft gravity-grouted G.A

Straight shaft pressure-grouted G.A

Solution:

Which of the following statements about Stokes' law is/are incorrect?

Both 2 and 3

The medium in which settlement takes place is assumed to be infinite

Particles are assumed to undergo hindered settling

It is valid for particles having a size range between 0.2 mm and 0.2 μm

Solution:

It is given that the water content of a clay soil is 100%. Which of the following statements is incorrect in regard to the given condition?

The weight of the air in the soil is zero.

The weight of solids (W_s) = the weight of water (W_w)

The soil is fully saturated.

None of the above.

Solution:

A flow net below a dam consists of 24 equipotential drops and 7 flow channels. The difference between the upstream and downstream water levels is 6m. The length of the flow line adjacent to the toe of the dam at exit is Im. The specific gravity and void ratio of the soil below the dam are 2.7 and 0.7, respectively. The factor of safety against piping is

1.67

2.5

3.4

Solution:

Match List-I with List-II and select the correct answer using the codes given below the lists:
List-I
A). Smooth wheel rollers
B). Sheep foot rollers
C). Pneumatic tyred rollers
D). Rammers
List-II
1). Most suitable for compacting cohesive soils
2). Most suitable for compacting coarse grained soils
3). Used for compacting soils in confined places
4). Suitable for both cohesionless and cohesive soils

A-4, B-3, C-2, D-1

A-2, B-1, C-4, D-3

A-4, B-1, C-2, D-3

A-2, B-3, C-4, D-1

Soil-mechanics Questions Set 25:

A soil sample has a dry unit weight of 1.2 g/cm³ and a void ratio of 0.7. Calculate the specific gravity of the soil.

Solution:

A sand deposit has a porosity of 0.3 and its specific gravity is 2.5. The critical hydraulic gradient to cause sand boiling in the stratum will be

Solution:

Compaction by vibratory roller is the best method of compaction in case of

Solution:

Deposit with flocculated structure is formed when

Solution:

Which of the following equations is correct?

Solution:

Which type of ground anchor (G.A) is most suitable for coarse granular soils and weak fissured rock?

Solution:

Which of the following statements about Stokes' law is/are incorrect?

Solution:

It is given that the water content of a clay soil is 100%. Which of the following statements is incorrect in regard to the given condition?

Solution:

Solution:

Solution:

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