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Q: Which of the following consistency limit of soil is indicated by rolling the soil into a thread of 3 mm, and it begins to crumble.
  • A. Plastic limit
  • B. Shrinkage limit
  • C. Casagrande’s limit
  • D. Liquid limit
Correct Answer: Option A - Plastic limit–It is defined as the minimum water content at which a soil will just began to crumble when rolled into a thread 3 mm in diameter. Liquid limit–It is defined as the minimum water content at which the soil is still in the liquid state. Shrinkage limit–It is defined as the maximum water content at which a reduction in water content will not cause a decrease in the volume of a soil mass.
A. Plastic limit–It is defined as the minimum water content at which a soil will just began to crumble when rolled into a thread 3 mm in diameter. Liquid limit–It is defined as the minimum water content at which the soil is still in the liquid state. Shrinkage limit–It is defined as the maximum water content at which a reduction in water content will not cause a decrease in the volume of a soil mass.

Explanations:

Plastic limit–It is defined as the minimum water content at which a soil will just began to crumble when rolled into a thread 3 mm in diameter. Liquid limit–It is defined as the minimum water content at which the soil is still in the liquid state. Shrinkage limit–It is defined as the maximum water content at which a reduction in water content will not cause a decrease in the volume of a soil mass.