Classification of Fine Grained Soil

Q. Consider the following statements:
1. For a well graded sand, the coefficient of curvature should lie between 1 and 3.
2. A soil having uniformity coefficient smaller than about 2.0 is considered uniform.
Which of these statements is/are correct?

1. Both 1 and 2
2. Neither 1 nor 2
3. 1 only
4. 2 only

Q. Consider the following clay minerals:
1. Kaolinite
2. Illite
3. Montmorillonite
Which one of the following is the correct sequence of the minerals given above in the increasing order of their grain size?

1. 3-2-1
2. 1-3-2
3. 1-2-3
4. 3-1-2

Q. Consider the following statements:
1. Mica is a clay mineral.
2. The shape of clay particle is usually flaky.
3. A particle of kaolinite is electrically charged.

Which of these statements is/are correct?

1. 1, 2, and 3
2. 1 and 3 only
3. 2 and 3 only
4. 2 only

Q. A fine grained soil has liquid limit of 60 and plastic limit of 20. As per the plasticity chart, according to IS classification, the soil is represents by the letter symbols

1. CL
2. Cl
3. CH
4. CL-ML

Q. The predominant mineral responsible for shrinkage and swelling in black cotton soils is

1. illite
2. kaolinite
3. mica
4. montmorillonite

Q. As per the Indian Standard soil classification system, a sample of silty clay with liquid limit of 40% and plasticity index of 28% is classified as

1. CH
2. CI
3. CL
4. CL-ML

Q. On analysis of particle size distribution of a soil. it is found that $D_{10}=0.1mm,D_{30}=0.3mmand{D}_{60}=0.8mm$. The uniformity coefficient and coefficient of curvature, as given by the particle size distribution curve, are respectively

1. 3 and 3
2. 2.67 and 1.125
3. 2.6 7and 3
4. 8 and 1.125

Q. Data from a sieve analysis conducted on a given sample of soil showed that 67% of the particles passed through 75 micron IS seive. The liquid limit and plastic limit of the finer fraction was found to be 45 and 33 percent respectively. The group symbol of the given soil as per IS:1498-1970 is

1. SC
2. MI
3. CH
4. MH

Q. A fine grained soil is found to be plastic in the water content range of 26-48%. As per Indian Standard Classifiction System, the soil is classified as

1. CL
2. CH
3. CL-ML
4. CI

Q. Consider the following statements:
1. If the soil is not black in colour, it is unlikely to be a swelling soil.
2. The swelling pressure of a fine-grained soil depends on its initially water content and density.
3. The swelling pressure of a fine-grained soil depends on the nature of the pore fluid.

Which of these statements are correct?

1. 1, 2 and 3
2. 1 and 2 only
3. 1 and 3 only
4. 2 and 3 only

Q. The collapsible soil is associated with

1. dune sands
2. laterite soils
3. loess soils
4. black cotton soils

Q. Consider the following statements:
A dispersed structure is formed in clay when

1. the net electrical forces between adjacent soil particles at the time of deposition are repulsive
2. remolding and compacting of clays have high void ratio
3. there is concentration of dissolved minerals in water
4. plate lets have face to face contact in more or less parallel arrays
Which of these statements are correct?

1. 1, 2 and 3
2. 2, 3 and 4
3. 1, 2 and 4
4. 1, 3 and 4

Q. Consider the following statements:
1. Each year, black cotton soil appreciably shrinks during dry season and swells during rainy season. This alternate cycle of shrinking and swelling causes severe stresses in structures supported directly by such soil.

2. Black cotton soil contains predominantly a clay mineral called kaolinite, which is responsible for causing appreciable shrinking and swelling.

3. Shrinking and swelling of black cotton soils are observed only upto a certain depth below the ground level. Below that level, there is neither shrinking nor swelling.

Which of these statements is/are correct?

1. 1, 2 and 3
2. 3 only
3. 2 and 3 only
4. 1 and 3 only

Q. Consider the following statements:
1. Poorly graded or uniform sands compact to low dry unit weights.
2. Heavy clays with high plasticity have very low maximum dry unit weight.
3. In clay soils, the maximum dry weight tends to decrease as plasticity increases.
Which of these statements is/are correct?

1. 1, 2 and 3
2. 1 and 2 only
3. 2 and 3 only
4. 3 only

Q. Match List-! (Soil) with List-II (Type) and select the correct answer using the codes given below the lists:
List-I List-II
A Fine sand 1.Expansive soil
B. Silt 2.Coarse grained soil
C. Peat 3.Fine grained
4.Organic soil

Codes:
A B C

1. 3 2 1
2. 4 3 1
3. 3 1 2
4. 2 3 4

Q. Statement (I) : Clays exhibit more hygroscopicity than sands.

Statement (II) : Clays are colloidal and consequently their specific surface is very high.

1. Both Statement (I) and Statement (II) are individually true and Statement (II) is the correct explanation of Statement
2. Both Statement (I) and Statement (II) are individually true but Statement (II) is not the correct explanation of Statement(I)
3. Statement (I) is true but Statement (II) is false
4. Statement (I) is false but Statement (II) is true

Q. A clay mineral has liquid limit of 96% and plastic limit of 16%. Sedimentation analysis reveals that the percentage of particle finer than 0.002 mm is 40%. The most probable clay mineral would be

1. Kaolinite
2. Illite
3. Montmorillonite
4. Inadequate data

Q.

Is zeolite a clay?