Determination of Shrinkage Limit

Q. Consider the following statements:
1. Illite the mineral largely responsible for the swelling and shrinkage behaviour of clayey soils.
2. A differential free swell value 55% indicates a soil with low degree of expansiveness.
3. Higher the plasticity index of a soil, greater its swelling potential.
4. A low shrinkage limit of a soil indicates possibility of swelling at low water content.

Which of the above statements are correct?

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

Q. A clay sample has a void ratio of 0.50 in dry state and specific gravity of solids is 2.70. Its shrinkage limit will be

1. 12%
2. 13.5%
3. 18.5%
4. 22%

Q. Statement (I) : At shrinkage limit, the soil is fully saturated.

Statement (II) : Montmorillonite clay minerals are non-expansive.

1. Both Statement (I) and Statement (II) are individually true and Statement (II) is the correct explanation of Statement(I)
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. During the soil exploration of a site, the site engineer collected the soil sample which is black cotton soil in saturated condition having volume 15 ml and total mass 20 gm. After putting in oven the volume the volume of dry soil is 10.9 ml the shrinkage ratio of soil if specific gravity of soil is 2.75 is [Take $\rho w=1gm/cc$] [ Take dry mass = 17.2 gm]

1. 2.63
2. 1.80
3. 2.26
4. 1.578