Soil Structure And Clay Mineralogy

Soil erosion can be prevented by

The predominant mineral responsible for shrinkage and swelling in black soil is

The collapsible soil is associated with

A soil sample having a void ratio of 1.3, water content of 50% and a specific gravity of 2.60, is in a state of

A soil has a liquid limit of 40% and plasticity index of 20%. The Plastic limit of the soil will be

The liquid limit and Plastic limit of sample are 65% and 29% respectively. The percentage of soil fraction with grain size finer than 0.002 mm is 24. The activity of soil sample is.

The soil sample A and B have porosity nA= 40% and nB = 60% respectively. What is the ratio of void ration ^eд: ^eB?

A sand sample has a bulk density of 20kN/m³ and degree of saturation of 70%. If the specific gravity of soil grain is 2.65, the value of critical hydraulic gradient for the soil will be.

In order to ensure that no scouring take place in the bed of a channel of bed slope 'S' constructed on alluvial soil of particle size 'd' cm, the flow velocity should be restricted.

The discharge unit draw down at the wall is known as.

Match List I with List II

	LIST I (Deposit)		LIST II (Satl structure)
A.	Coarse grained soil	I.	Flocculated
B.	Silt deposit	II.	Cohesive matrix
C.	Clay deposit	III.	Honey comb
D.	Composite soil	IV.	Single grained

Choose the most appropriate answer from the options given below:

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: The water content of inorganic soil is determined by heating the soil in an oven at a temperature of 105° to 110°C
Reason R: The free water absorbed water and structural water are all completely removed from the soil by heating it at 105° to 110°C
In the light of the above statements, choose the most appropriate answer from the options given below:

Relative density of a compacted dense sand is approximately equal to.

A soil has a liquid limit of 40% and plasticity index of 20% the plastic limit of the soil will be.

A soil sample has a shrinkage limit of 10% and specific gravity of soil solids as 2.7. The porosity of the soil at shrinkage limit is.

A soil has a discharge velocity of 6 × 10 ⁻7 m/s and a void ratio of 0.5, its seepage velocity is.

Match List I with List II

	LIST I (Type of Precipitation)		LIST II (Principle causes)
A.	Lacustrine soil	I.	Transportation by wind
B.	Alluvial soil	II.	Transportation by running water
C.	Aeoline soil	III.	Deposited at the bottom of lakes
D.	Marine soil	IV.	Deposited in sea water

Choose the most appropriate answer from the options given below:

Reduction in volume of soil primarily due to squeezing out of water from winds is called.

The change that take place during the process of consolidation of a saturated clay would include.

Match List I with List II

	LIST I (Measuring device)		LIST II (Soil Parameter)
A.	Pycnometer	I.	Compressibility
B.	Hydrometer	II.	Permeability
C.	Oedometer	III.	Specific gravity
D.	Parameter	IV.	Particle size analysis

Choose the most appropriate answer from the options given below:

Match List I with List II

	LIST I I (Soil)		LIST II (Group Symbol)
A.	Clayly gravel	I.	SM
B.	Clayly sand	II.	OH
C.	Organic clay	III.	SC
D.	Silty sand	IV.	GC

Choose the most appropriate answer from the options given below:

If the soil sample is having porosity 50% and degree of saturation at 90% then its percentage air void is -

If the grain size of soil increases

The quantity of water retained by the sub-soil against gravity is known

On analysis of particle size distribution of a soil, it is found that D₁₀ = 0.2 mm, D₃₀ = 0.3 mm and D₆₀ = 0.8 mm. The coefficient of curvature, as given by the particle size of distribution curve will be -

Consistency index (IC) is defined as
where w is natural water content of soil, w_L is liquid limit of soil; w_P is plasticity limit of soil; IP is plasticity index of soil sample.

Cohesive soil are generally

Soil erosion by wind brings about the serious damage in soil by changing the

Which class of land should be used for pasture and forest?

Given below are two statements; one is labelled as Assertion A and the other is labelled as Reason R
Assertion A: Sandy soil helps promote good drainage and aeration.
Reason R: Sandy soils particles have size in the range 0.05 - 2.0mm.
In the light of the above statements, choose the most appropriate answer from the options given below