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