This set of Geotechnical Engineering Multiple Choice Questions & Answers (MCQs) focuses on “The Capillarity-Permeability Test”.
1. The capillarity-permeability test may be also called as ___________
a) Vertical capillarity test
b) Horizontal capillarity test
c) Capillary test
d) Coefficient of permeability test
View Answer
Explanation: The apparatus used in capillary-permeability test is horizontal; hence it can be also called as horizontal capillarity test.
2. The capillary-permeability test, is used to determine ___________
a) Coefficient of permeability and Capillary test
b) Degree of saturation
c) None of the mentioned
d) All of the mentioned
View Answer
Explanation: The capillarity-permeability test or the horizontal capillarity test is used to determine the coefficient of permeability K as well as the capillarity test hc of the soil sample.
3. The bedding planes of soil layers in soil mass may be __________
a) Horizontal
b) Vertical
c) Inclined
d) All of the mentioned
View Answer
Explanation: In nature, soil may consist of several layers deposited one above the other. Their bedding planes may be horizontal, inclined or vertical.
4. Each layer of soil layer has its own value of ___________
a) Degree of saturation
b) Coefficient of permeability
c) Capillary head
d) All of the mentioned
View Answer
Explanation: Since layer of soil is assumed to be homogeneous and isotropic, each layer has its own value of coefficient of permeability.
5. The average permeability of soil deposits depends on __________
a) Direction of flow
b) Coefficient of permeability
c) Moisture content
d) Saturation of the soil
View Answer
Explanation: The average permeability of the whole soil deposit will depend upon the direction of flow with relation to the direction of bedding planes.
6. The degree of saturation in capillarity-permeability test can be found out by ___________
a) Known dry mass of soil
b) Taking wet mass of soil
c) Finding the porosity
d) All of the mentioned
View Answer
Explanation: The degree of saturation can be found out by taking the wet mass of the soil sample at the end of the test.
7. The saturation in capillary-permeability is assumed to be ___________ percentage.
a) 0
b) 50
c) 75
d) 100
View Answer
Explanation: The saturation is assumed to be 100 % so that the formula nvs=Ki is derived from Darcy’s law.
8. The possible directions of flow of the soil deposit with respect to the bedding planes are ___________
a) Parallel and Perpendicular
b) Inclined
c) None of the mentioned
d) All of the mentioned
View Answer
Explanation: There are two possible cases of flow, one is parallel to the bedding plane and another is perpendicular to the plane.
9. The hydraulic gradient (i), used in capillary-permeability test is ____________
a) h0+hc/x
b) h0/x
c) h0+hc
d) hc/x
View Answer
Explanation: The hydraulic head lost in causing of flow = h0+hc
Therefore, hydraulic gradient = h0+hc/x.
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