Classification of Coarse Grained Soil

Q. Based on grain distribution analysis, the $D_{10}$, $D_{30}$ and $D_{60}$ values of a given soil are 0.23 mm, 0.3 mm and 0.41 mm respectively. As per IS code, the soil classification will be

1. SW
2. SP
3. SM
4. SC

Q. The laboratory test results of a soil sample are given below

Percentage finer than 4.75 mm = 60

Percentage finer than 0.075 mm = 30

Liquid Limit = 35%; Plastic Limit = 27%

The soil classification is

1. GM
2. SM
3. GC
4. ML-MI

Q. Consider the following statements:
A well-graded sand should have
1. uniformity coefficient greater than 6
2. coefficient of curvature between 1 and 3
3. effective size greater than 1 mm
Which of these statements are correct?

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

Q. If the proportion of soil passing 75 micron sieve is 50% and the liquid limit and plastic limit are 40% and 20% respectively, then the group index of the soil is

1. 3.8
2. 6.5
3. 38
4. 65

Q. The particle size distribution curves are extremely useful for the classification of

1. fine grained soils
2. coarse grained soils
3. both coarse grained and fine grained
4. slits and clays

Q. Consider the following clay minerals:

1. Kaolinite
2. Montmorillonite
3. Illite

What is the correct sequence in an increasing order of their plasticity index?

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

Q. Sieve analysis on a dry soil sample of mass 1000g showed that 980g and 270g of soil pass through 4.75 mm and 0.075 mm sieve respectively. The liquid limit and plastic limit of the soil fraction passing through 425 $\mu$ sieves are 40% and 18%, respectively. The soil may be classified as

1. SC
2. MI
3. CI
4. SM

Q. The void ratios at the densest, loosest and the natural states of a sand deposit are 0.2, 0.6, and 0.4 respectively. The relative density of the deposit is

1. 100 %
2. 75 %
3. 50 %
4. 25 %

Q. Laboratory sieve analysis was carried out on a soil sample using a complete set of standard IS sieves. Out of 500 g of soil used in the test, 200g was retained on IS 600$\mu$ sieve, 250 g was retained on IS 500 $\mu$ sieve and the remaining 50 g was retained on IS 425 $\mu$ sieve.

The classification of the soil is

1. SP
2. SW
3. GP
4. GW

Q. The standard plasticity chart to classify fine grained soils is shown in the given figure.



The area marked X represents

1. silt of low plasticity
2. clay of high plasticity
3. organic soil of medium plasticity
4. clay of intermediate plasticity

Q. A soil has a liquid limit of 45% and lies above the A-line when plotted on a plasticity chart. The group symbol of the soil as per IS soil Classification is

1. CH
2. CI
3. CL
4. MI

Q. Consier the following statements:

1. Mica is a clay mineral.
2. Rock dust particles, even of clay size are non-plastic
3. A particle of kaolinite is electrically charged.

Which of these statements are correct?

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

Q. Consider the following statements:
1. The minimum value of group index for a soil can be taken as zero.
2. The maximum possible value of group index for a soil is twenty.
Which of these statements is/are correct?

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

Q. Consider the following statements:
1. A conspicuous break in the continuity of a grain size distribution curve indicates a mixture of soil from two different layers.
2. A steep grain size distribution curve indicates prevalence of nearly uniform grain size.
3. A flat grain size distribution curve indicates certain range of missing grain sizes.
Which of these statements are correct?

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

Q. $Agivencohesionlesssoilhas{e}_{max}=0.85,e_{min}=\mathrm{0.5.}Inthefield,thesoiliscompactedtoamassdensityof1800kg/m^{3}atw/c8\%anddensityofwater1000kg/m^{3}and{G}_s=\mathrm{2.7.}Therelativedensityis$( in % )

1. 56.43
2. 60.25
3. 62.87
4. 65.71

Q. In a soil specimen, 70% of particles are passing through 4. 75 mm IS sieve and 40% of particles are passing through 75 μ IS sieve. Its uniformity coefficient is 8 and coefficient of curvature is 2. AS per IS classification, this soil is classified as

1. SP
2. GP
3. SW
4. GW

Q. Match List-I (Deposit) with List -II (Soil structure) and select the correct answer using the codes given below the lists:

List - I List - II
A. Coarse grained soil 1. Flocculated
B. Silt deposit 2. Cohesive matrix
C. Clay deposit 3. Honeycomb
D. Composite soil 4. Single-grained

Codes:

1. A B C D
   2 3 1 4
2. A B C D
   4 3 1 2
3. A B C D
   2 1 3 4
4. A B C D
   4 1 3 2

Q. Consider a soil sample, for which test yield the following results:
Passing 75 micron sieve 62%
Liquid limit 35%
Plasticity index 14%
As per the group index classification of soil, what is the soil condition of the above soil sample?

1. Poor
2. Fair
3. Good
4. Excellent

Q. Match List-I (Soil classification symbol) with List-II
(Soil property) and select the correct answer using the codes given below the lists:
List-I List-II
A. GW 1. Soil having uniformity coefficient > 6
B. SW 2. Soil having uniformity coefficient > 4
C. ML 3. Soil have low plasticity
D. CL 4. Soil have low compressibility
Codes:
A B C D

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

Q. Arrange the following soils with respect to increasing order of realizable friction ratio:

1. Loose gravel fill
2. Sands or gravels
3. Clay sand mixtures and silts
4. Clays and peats

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

Q. Match List-I (Symbol) with List-II (Soil) and select the correct answer using the codes given below the lists:

List-I
A. ML
B. SM
C. Pt
D. MH
List-II
1 . Silty sand
2. Inorganic silt with large compressibility
3. Inorganic silt with small compressibility
4. Soil with high organic content with high compressibility
Codes:
A B C D

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

Q. Match List-I (Soils) with List-II (Group symbols) and select the correct answer using the codes given below the lists:

List-I
A. Clayey gravel
B. Clayey sand
C. Organic clay
D. Silty sand
List-II
1. SM
2. OH
3. SC
4. GC
Codes:
A B C D

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

Q. Match List -I with List -II and select the correct answer using the code given below the lists:

Lists-I

A. Plate load
B. Pycnometer
C. Core cutter
D. Mechanical sieve

Lists -II
1. Specific gravity
2. Bearing capacity
3. Grain size analysis
4. Field density

Code:

1. A B C D
   3 1 4 2
2. A B C D
   2 1 4 3
3. A B C D
   3 4 1 2
4. A B C D
   2 4 1 3