# Practice Test: Question Set - 05

**1. Pick up the incorrect definition from the following:**

- (A) Ratio
of the compressive strength of unconfined undisturbed soil to that of remoulded
soil, is known as the sensitivity of the soil sample

- (B) The
rotation of soil particles into stable state while remoulding, is known as the
thiostropy of soil

- (C) The
water content at which a soil flows, is known plastic limit of the soil

- (D) None of
these

**2. A 600 mm square bearing plate settles by 15 mm in plate load test on a cohesion-less soil under an intensity of loading of 0.2 N/ram². The settlement of a prototype shallow footing 1 m square under the same intensity of loading is**

- (A) 15 mm

- (B) Between 15 mm and 25 mm

- (C) 25 mm

- (D) Greater than 25 mm

**3. According to Rankine's formula, the minimum depth of foundation**

- (A)

*h*= (

*P*/

*W*)

*[(1 - sin ϕ)/(1 + sin ϕ)]*

^{2}

- (B)

*h*= (

*w*/

*P*)

*[(1 - sin ϕ)/(1 + sin ϕ)]*

^{ 2}

- (C)

*h*= (

*P*/

*w*)

*[(1 - sin ϕ)/(1 + tan ϕ)]*

^{ 2}

- (D)

*h*= (

*P*/

*w*)

*[(1 - tan ϕ)/(1 + tan ϕ)]*

^{ 2}

**4. The angle between the directions of the failure and the major principal plane, is equal to**

- (A) 90°
+ effective angle of shearing resistance

- (B) 90° + half
of the angle of shearing resistance

- (C) 45° - half
of the angle of shearing resistance

- (D) 45°
+ half of the angle of shearing resistance

**5. In active state of plastic equilibrium in a non cohesive soil with horizontal ground surface**

- (A) Major
principal stress is horizontal

- (B) Minor
principal stress is vertical

- (C) Major
principal stress is vertical

- (D) Minor
and major principal stresses are equally inclined to horizontal

**6. Residual soils are formed by**

- (A) Glaciers

- (B) Wind

- (C) Water

- (D) None of the above

**7. A soil not fully consolidated under the existing over-burden pressure, is called**

- (A) Pre-consolidated

- (B) Normally
consolidated

- (C) Over-consolidated

- (D) None
of these

**8. Pick up the correct statement from the following:**

- (A) Illite
bond is weaker than Kaolinite bond

- (B) Illite
bond is stronger than montmorillonite bond

- (C) Illite
does not swell when wet

- (D) All
the above

**9. If**

*C*is the coefficient of consolidation, ‘_{v}*t’*is the time and ‘*d’*is drainage path of one dimensional consolidation of soil, the time factor*T*is given by_{v}- (A)

*T*=

_{v}*d*/

^{2}*C*

_{v}*t*

- (B)

*T*=

_{v}*t*

^{2}/

*d*

^{2}

*C*

_{v}- (C)

*T*=

_{v}*C*

_{v}*/*

^{3}*d*

^{2}

*t*

- (D)

*T*=

_{v}*C*

_{v}*/*

^{t}*dt*

^{2}

**10. Select the correct statement.**

- (A) Unit weight of dry soil is greater than unit weight
of wet soil

- (B) For dry soils, dry unit weight is less than total
unit weight

- (C) Unit weight of soil increases due to submergence in
water

- (D) Unit weight of soil decreases due to submergence in
water

**11. The bearing capacity of a soil depends upon**

- (A) Size
of the particles

- (B) Shape
of the particles

- (C) Cohesive
properties of particles

- (D) All
the above

**12. Fundamental relationship between dry density (**

*γ*), bulk density (_{d}*γ*) and water content (*ω*), is:- (A)

*γ*=

*γ*/1 +

_{d}*ω*

- (B)

*γ*=

_{d}*γ*/1 +

*ω*

- (C)

*ω*=

*γ*/1 +

*γ*

_{d}- (D)

*ω*= γ/1 - γ

_{d}

**13. Pick up the correct statement from the following:**

- (A) The void
ratio in soils is defined as the ratio of the volume of voids to the volume of
solids

- (B) The bulk
density of a soil is defined as the unit weight of the soil

- (C) The
dry density of a soil is defined as weight of solids to the total volume of the
soil

- (D) All
the above

**14. If the water content of a fully saturated soil mass is 100%, then the voids ratio of the sample is**

- (A) Less than specific gravity of soil

- (B) Equal to specific gravity of soil

- (C) Greater than specific gravity of soil

- (D) Independent of specific gravity of soil

**15. If water content of a soil is 40%,**

*G*is 2.70 and void ratio is 1.35, the degree of saturation is- (A) 70 %

- (B) 75 %

- (C) 80 %

- (D) 85 %

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