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Question
Consider the following statement regarding permeability of soils:
1. Permeability of coarse grained soil is inversely proportional to the specific surface area at a given porosity.
2. Direct measurement of permeability of a soil specimen at any stage of loading in oedometer test can be made only by floating ring type oedometer.
3. The permeability depends on the nature of soil and not on properties of liquid flowing through soil.
Which of the above statement(s) is/are correct
A.
1 and 2 only
B.
1 and 3 only
C.
1 only
D.
2 and 3 only
Answer ( Option C)

1 only

Solution

(ii) Two types of oedometer, floating ring type and fixed ring type, are commonly used. However, it is only in the fixed ring test the drainage from the bottom porous stone can be measured or controlled. Hence, measurement of permeability of the soil can be made only in the fixed ring test.
(iii)  Permeability depends on the nature of soil and also on properties of liquid flowing through soil
             

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