# Geotechnical Engineering Questions and answers – Consistency of Soils

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This set of Geotechnical Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Consistency of Soils”.

1. The property of a soil which allows it to be deformed rapidly, without rupture is _________
a) Elasticity
b) Plasticity
c) Tenacity
d) None of the mentioned

Explanation: Plasticity is the property of a soil which allows it to be deformed rapidly, without rupture, without elastic rebound and without volume change.

2. The ratio of liquid limit, minus the natural water content to the plasticity index of the soil is __________
a) Consistency index
b) Plasticity index
c) All of the mentioned
d) None of the mentioned

Explanation: consistency index or relative consistency is defined as the ratio of liquid limit, minus the natural water content to the plasticity index of the soil.

3. The consistency (or) relative consistency (Ice) is given by the formula __________
a) IC = WL-W/IP
b) IC = W-WL/IP
c) IC = W-WL/IP
d) IC = W-WP/IP

Explanation: The consistency or relative density is defined as ratio of liquid limit, minus the natural water content to the plasticity index of the soil IC = WL-W/IP.
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4. The shrinkage limit is represented by the term ___________
a) IP
b) WS
c) IC
d) WP

Explanation: Shrinkage limit is represented as WS.

5. The Swedish agriculturist who divided the entire range of consistency from liquid to solid states is __________
a) Dupuit’s
b) Laplace
c) Boussinesq
d) Atterberg

Explanation: In 1911, Atterberg who was a Swedish Agriculturist divided the entire range of liquid to solid state in to four stages.

6. Which of the following is not useful for engineer purpose, as proposed by Atterberg?
a) Plastic limit
b) Liquid limit
c) Solid limit
d) Shrinkage limit

Explanation: Liquid limit, plastic limit, shrinkage limit are useful for engineering purpose.

7. According to Goldschmidt theory, the plasticity in soil is due to __________
a) Electro-magnetic charges
b) Smooth surface
c) All of the mentioned
d) None of the mentioned

Explanation: The plasticity in soil is due to the presence of thin scale like particles which carry on to their surfaces, electro-magnetic charges.

8. Clay does not become plastic, when mixed with ___________
a) Soap solution
b) Kerosene
c) Oil
d) None of the mentioned

Explanation: According to Goldschmidt theory, the clay does not become plastic when mixed with liquids of non-polarizing agents like kerosene.

9. In consistency of soil, the limits are expressed in terms of__________
a) Per cent water content
b) Area
c) Volume
d) All of the mentioned

Explanation: According to Atterberg, the consistency limits are expressed as percent water content.

10. Which of the following is not considered as one of the state, as divided by Atterberg?
a) Solid state
b) Gaseous state
c) Semi-solid state
d) Liquid state

Explanation: The four stages as divided by Atterberg are solid state, liquid state, plastic state, semi-solid state.

Sanfoundry Global Education & Learning Series – Geotechnical Engineering.

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