Normally and Over Consolidated Soils

Q. Which one of the following soils has stress-strain response similar to that of dense sand? (OCR stands for over consolidation ratio)

1. Over consolidated clays having high OCR
2. Over consoildated clays having low OCR
3. Normally consolidated clays
4. Unconsolidated clays

Q. The result of a consolidation test on an undisturbed soil, sampled at a depth of 10 m below the ground level are as follows:

Saturated unit weight : 16 kN/$m^3$

Pre-consolidation pressure : 90 kPa

The water table was encountered at the ground level. Assuming the unit weight of water as $10kN/m^3$, the over-consolidation ratio of the soil is

1. 0.67
2. 1.50
3. 1.77
4. 2.00

Q. A test was conducted on normally consolidated clay. Failure occurred under a allround pressure of $200kN/m^2$ and at deviatric stress of $450kN/m^2$. Match List-I with List-II and select the correct answer using codes below.

$\begin{array}{cc}\text{List-I}& \text{List-II}\\ \text{Angles made by failure plane with major principal axis}& \text{191}kN/m^2\\ \text{Angle made by plane of maximum shear stress with major principal plane}& \text{61}{}^{\circ }\\ \text{Shear stress on failure plane}& \text{305.6}kN/m^2\\ \text{Normal stress on failure plane}& \text{45}{}^{\circ }\end{array}$

Codes :

1. P Q R S
   
   1 2 3 4
2. P Q R S
   
   2 1 4 3
3. P Q R S
   
   2 4 1 3
4. P Q R S
   
   1 2 4 3

Q. Following stratum, which be having maximum void ratio

1. Normally consolidated clay
2. Over consolidated clay
3. A sandy clay stratum
4. A silty clay stratum

Q. When a structural load is applied on a soil stratum, which of the following soil types will have the minimum settlement?

1. Over-consolidated clay stratum
2. Clayey silt stratum
3. Normally consolidated clay stratum
4. Sandy clay stratum