Geotechnical Engineering Questions and Answers – Factors Affecting Permeability

Geotechnical Engineering Objective Questions

This set of

1. Based on Allen Hazen experiments, permeability can be expressed as ___________

A) K=CD102
B) K=CD210
C) K=DC210
D) K=DC102

Answer is A)

2. Which of the following factors affects the permeability of soil?

A) Grain size
B) Properties of pore fluid
C) Void ratio of soils
D) All of the mentioned

Answer is D)

3. Physical permeability of a soil KP is related to the coefficient of permeability by the equation ___________

A) KP=kɳ
B) KP=kɳ/γW
C) KP=k/ɳ
D) KP=k γW

Answer is B)

4. Loudon’s experiments demonstrated the relationship between _____________

A) Permeability and specific surface
B) Permeability and grain size
C) Permeability and adsorbed water
D) Permeability and volume

Answer is A)

5. What is the constant value of a and b in Loudon’s empirical formula “log10(KSs2) = a + bn”?

A) 1 and 0
B) 1.515 and 1.365
C) 1.365 and 1.515
D) 0 and 1

Answer is C)

6. What is the relationship between permeability and viscosity of water?

A) Directly proportional
B) Inversely proportional
C) Both are equal
D) None of the mentioned

Answer is B)

7. What is the effect of adsorbed water on the permeability of soil?

A) Structural arrangement is varied
B) Reduced degree of saturation
C) Size of the particles is diminished
D) Reduces the pore size

Answer is D)

8. What is the approximate value, which can be taken as void ratio occupied by adsorbed water?

A) 1
B) 0
C) 0.1
D) 10

Answer is C)

9. The effect of structural disturbance is on permeability is more in _____________

A) Fine-grained soil
B) Coarse grained soil
C) Clay soil
D) All of the mentioned

Answer is A)

10. The structural arrangement of soil Particle vary depending upon ______________

A) Method of deposition and Compacting the soil mass
B) Degree of saturation
C) None of the mentioned
D) All of the mentioned

... Answer is A)