1.The specific surface of a soil particle will be ___________
a) Proportional to inter-molecular surface
b) Inversely proportional to electric force
c) Proportional to the compressive force
d) Directly proportional to electric force
Explanation: The electrical force responsible for inter-particle effect is proportional to the specific surface.
2.The harmonic diameter, can be found out by using __________
a) kozney’s method
b) casagrande method
c) Skempton’s method
d) Atterberg method
Explanation: The harmonic diameter DH can be found by using kozney’s method using the formula
F=6/ρs×1/Dn
3. Specific surface of a soil is related with __________
a) Chemical properties of the soil
b) Physical properties of the soil
c) General characteristic of the soil
d) All of the mentioned
Explanation: As specific surface is associated with surface characteristics of a particle, therefore it is related with physical properties.
4. Microscopic soil particles have a very ___________
a) Larger specific surface
b) A larger volume
c) Small specific surface
d) Larger diameter
Explanation: As the specific surface increases as the size of the grain decreases. Therefore Microscopic particles have a large specific surface.
5. Specific surface(SS) can also expressed as ________
a) Surface area of the particle per unit volume
b) Physical properties of the soil
c) Moisture content of the soil
d) None of the mentioned
Explanation: From the expression, specific surface = surface area of particle/volume of the particle, it can be seen that specific surface is the surface area of a particle.
6. Permeability of the soil depends on __________
a) Size of the soil particle
b) Moisture present in soil
c) Specific surface of the soil particle
d) Density of the soil
Explanation: Permeability of soil greatly depends on the specific surface of the soil because of the viscous effects associated with surface characteristics of the grains.
7. Chemical activity of a clay mineral depends on __________
a) Electric charge
b) Surface area
c) Compactness
d) Unit mass
Explanation: The chemical activity of the clay mineral depends upon the surface area, because of the electrical charge of clay minerals is high per unit mass.
8. For engineering purpose, soil can be classified in terms of ___________
a) Particle size
b) Textural
c) Unified soil
d) All of the mentioned
Explanation: For general engineering purposes, soil can be classified in terms of particle size, textural and unified soil.
9. Systems which are used for classification of soil based on particle size are __________
a) PRA system of united states
b) Indian standard classification system
c) International soil classification
d) All of the mentioned
Explanation: Based on particle size, soil can be classified as
i) U.S. Bureau of soil and public road administration system
ii) The M.I.T. classification system
iii) Indian standard classification system
iv) International soil classification system.
10. In particle size classification system, the soils are classified according to __________
a) Grain size
b) Properties
c) Shape
d) Solubility
Explanation: In the particle soil classification system, soils are arranged to the grain size.