Practice Soil Classification Using Group Symbols (6.4) - Indian Standard Soil Classification System

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6 sample questions

Question 1.
Define fine-grained soils.
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Think about particle sizes.
Question 2.
What does the plasticity index indicate?
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Consider how soil behaves under different conditions.
3Question 3.
What indicates a high plasticity soil?
- Clay with PI > 50
- Clay with PI < 35
- Silt with PI = 0
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Consider the definitions of PI.
4Question 4.
The liquidity index of a soil that is soft falls between which values?
- 0.5 - 0.75
- 0.75 - 1
- 0 - 0.25
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Refer to liquidity index classifications.
Question 5.
Given a soil with 60% clay, liquid limit of 40%, and a plastic limit of 25%, classify the soil and calculate its liquidity index.
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Ensure you compute the plasticity index first.
Question 6.
If a construction site has soils classified as 'GW', what does this indicate about the gravel's properties?
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Think about the implications of grading in soil structure.

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