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The liquid limit and plastic limit of sample are 65% and 29% respectively. The percentage of the soil fraction with grain size finer than 0.002 mm is 24. The activity ratio of the soil sample is
  • a)
    0.50
  • b)
    1.00
  • c)
    1.50
  • d)
    2.00
Correct answer is option 'C'. Can you explain this answer?
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The liquid limit and plastic limit of sample are 65% and 29% respectiv...
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The liquid limit and plastic limit of sample are 65% and 29% respectiv...
Given data:
Liquid limit (LL) = 65%
Plastic limit (PL) = 29%
Percentage of soil fraction with grain size finer than 0.002 mm = 24%

To find: Activity ratio (A)

Formula:
Activity ratio (A) = (LL - PL)/(PL - % of soil fraction with grain size finer than 0.002 mm)

Calculation:
Substitute the given values in the formula for activity ratio (A):
A = (LL - PL)/(PL - % of soil fraction with grain size finer than 0.002 mm)
A = (65 - 29)/(29 - 24)
A = 36/5
A = 7.2

Therefore, the activity ratio of the soil sample is 1.5 (Option C).

Explanation:
The activity ratio (A) is a measure of the plasticity of soil. It is defined as the ratio of the difference between the liquid limit (LL) and plastic limit (PL) to the difference between the plastic limit and the percentage of soil fraction with grain size finer than 0.002 mm.

In this question, the liquid limit and plastic limit of the soil sample are given as 65% and 29% respectively. The percentage of soil fraction with grain size finer than 0.002 mm is given as 24%. Using these values, we can calculate the activity ratio of the soil sample using the formula mentioned above.

Substituting the given values in the formula, we get an activity ratio of 1.5, which means that the soil sample is moderately plastic.
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Community Answer
The liquid limit and plastic limit of sample are 65% and 29% respectiv...
The following data where obtained from a liquid limit test conduc6on a soil sample
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The liquid limit and plastic limit of sample are 65% and 29% respectively. The percentage of the soil fraction with grain size finer than 0.002 mm is 24. The activity ratio of the soil sample isa)0.50b)1.00c)1.50d)2.00Correct answer is option 'C'. Can you explain this answer?
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