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Soil Indices and Classification Quiz

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Questions and Answers

What does the liquid limit (LL) of soil indicate?

The moisture content at which soil behaves as a liquid material and starts to flow (correct)

The moisture content at which soil transforms to a solid state

The moisture content at which soil becomes plastic and moldable

The moisture content at which soil is at its firmest state

What is the shrinkage limit of soil?

Moisture content at which soil becomes plastic and moldable

Moisture content at which soil is at its firmest state

Moisture content at which dry soil transforms from solid state to a semisolid state (correct)

Moisture content at which soil starts to behave like a liquid material and flow

What is the significance of the plastic limit of soil?

Moisture content at which dry soil transforms from solid state to a semisolid state

Moisture content at which soil is at its firmest state

Moisture content at which soil behaves like a liquid material and starts to flow

Moisture content at which soil becomes plastic and moldable (correct)

What does the moisture content at the corresponding junction points of the states represent?

Moisture content at which soil starts to behave like a liquid material and flow Signup and view all the answers

Which type of soil shrinks and swells with changes in moisture content?

Vertisols Signup and view all the answers

In which type of soil do deep wide cracks form during dry periods?

Alfisols Signup and view all the answers

Which type of soil is dry for long periods with only short periods of wetness, reducing leaching and allowing accumulation of soluble salts?

Aridisols Signup and view all the answers

Which type of soil is usually moist and moderately to strongly acidic, requiring lime and fertilizers?

Spodosols Signup and view all the answers

What does the liquid limit of a fine-grained soil indicate?

The moisture content at which the shear strength of the soil is approximately 2.5kN/m2 Signup and view all the answers

How is the liquid limit determined in the Fall Cone Test?

By measuring the cone penetration at different moisture contents and plotting the results on a graph Signup and view all the answers

What defines the liquid limit in the Fall Cone Test?

The water content corresponding to a cone penetration of 20 mm Signup and view all the answers

What does the plastic limit of a soil indicate?

The moisture content at which a soil thread will crumble under a specific diameter Signup and view all the answers