1. The soils which plot above the A-line in the plasticity chart are ____.

[A] Sands

[B] Organic Soils

[C] Silts

[D] Clays

Answer: Option D


2. The correct sequence of plasticity of minerals in soil in an increasing order is ____.

[A] Silica, Kaolinite, Illite, Montmorillonite

[B] Kaolinite, Illite, Montmorillonite, Silica

[C] Montmorillonite, Silica, Kaolinite, Illite

[D] Kaolinite, Illite, Silica, Montmorillonite

Answer: Option A


3. Assertion [A]: Black cotton soils are clay and exhibit characteristic property of swelling.

    Reason (R): These clays contain Montmorillonite which attracts external water into its lattice                              structure.

[A] Both A and R are true and R is not the correct explanation of A

[B] Both A and R are true and R is the correct explanation of A

[C] A is false but R is true

[D] A is true but R is false

Answer: Option B


4. ___ is chemically combined in the crystal structure of the soil mineral and can be removed only by breaking the crystal structure.

[A] Structural water 

[B] Hygroscopic water

[C] Capillary water

[D] Adsorbed water

Answer: Option A


5. Which of the following soil structure is possible for cohesionless soils?

(i) Single grained structure

(ii) Honey-Comb structure

(iii) Flocculated structure

(iv) Dispersed structure

[A] Only (1)

[B] (i) and (ii)

[C] (ii), (iii) and (iv)

[D] (i), (iii) and (iv)

Answer: Option B




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