Basic Definitions

Q. The value of porosity of a soil sample in which the total volume of soil grains is equal to twice the total volume of voids would be

1. 75%
2. 66.66%
3. 50%
4. 33.33%

Q. A soil sample has a void ratio of 0.5, its porosity will be

1. 50%
2. 66%
3. 100%
4. 33%

Q. Assertion (A): The water content of inorganic soils is determined by heating the soil in an oven at a temperature of ${105}^{0}to{110}^{0}C$.
Reason (R): The free water, absorbed water and structural water are all completely removed from the soil by heating it at ${105}^{0}to{110}^{0}C$

1. both A and R are true and R is the correct explanation of A
2. both A and R are true but R is not a correct explanation of A
3. A is true but R is false
4. A is false but R is true

Q. A dry soil sample has equal amounts of solids and voids by volume. Its void ratio and porosity will be

Void ratio Porosity (%)

(a) 1.0 100%

(b) 0.5 50%

(c) 0.5 100%

(d) 1.0 50%

1. (a) 1.0 100%
2. (b) 0.5 50%
3. (c) 0.5 100%
4. (d) 1.0 50%

Q. The porosity of a soil sample having its void ratio equal to unity would be

1. 33.34%
2. 50.0%
3. 66.66%
4. 75.0%

Q. The alluvial-transported soil consisting of sand, silt and clay and occasionally having organic matter is known as

1. Talus
2. Muck
3. Terra Rossa
4. Loam

Q. In a wet soil mass, air occupies one-fourth of its volume and water occupies one-half of its volume. The void ratio of this soil is:

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

Q.

How do scientists measure the porosity of soil?

Q. For a sandy soil with soil grains spherical in shape and uniform in size, what is the theoretical void ratio?

1. 0.61
2. 0.71
3. 0.91
4. 0.81

Q. The porosity $\left(n\right)$ and the degree of saturation $\left(S\right)$ of a soil sample are 0.7 and 40%, respectively. In a 100 $m^3$ volume of the soil, the volume $\left(expressedin{m}^3\right)$ of air is

1. 42

Q. As per terzaghi , Soil may be defined as

1. sediments and other unconsolidated solid particles with or without an admixture of organic constituents.
   
2. consolidated sediments of solid particles formed by physical and chemical weathering
3. sediments with an admixture of inorganic constituents.
4. sediments formed by Physical and Chemical disintegration of rocks.

Q. Match List-I (Measuring device) with List-II (Soil
parameter) and select the correct answer using
the codes given below the lists:
List-I List-II
A. Pycnometer 1 . Compressibility
B. Hydrometer 2. Permeability
C. Oedometer 3. Specific gravity
D. Permeameter 4. Particle size analysis
Codes:
A B C D

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

Q. A soil sample has a void ratio of 0.5 and its porosity will be close to

1. 50%
2. 66%
3. 100%
4. 33%

Q. Match the List - I with List -II and select the answer using codes given below.

$\begin{array}{cc}\text{List-I}& \text{List-II}\\ \text{(A)Bentonite soil}& \text{1. Chemically weather volcanic ash.}\\ \text{(B)Muck soil}& \text{2. Chemically weathered residual soil}\\ \text{(C)Black cotton soil}& \text{3.Soil which is transported by wind}\\ \text{(D)Aeolian soil}& \text{4.Mixture as organic soil and Black decomposed organic matter}\end{array}$ .

Codes

1. A B C D
   
   1 4 2 3
2. A B C D
   
   1 4 3 2
3. A B C D
   
   1 2 4 3
4. A B C D
   
   2 4 3 1

Q. As per terzaghi , Soil may be defined as

1. sediments and other unconsolidated solid particles with or without an admixture of organic constituents.
   
2. consolidated sediments of solid particles formed by physical and chemical weathering
3. sediments with an admixture of inorganic constituents.
4. sediments formed by Physical and Chemical disintegration of rocks.

Q. Lacustrine soils are soils

1. transported by rivers and streams
2. transported by glaciers
3. deposited in sea beds
4. deposited in lake beds