For a horizontally layered soil deposit, the equivalent coefficient of permeability for vertical flow is based on the:
Correct answer: C. Harmonic mean of layer permeabilities
- A. Arithmetic mean of layer permeabilities
- B. Geometric mean of layer permeabilities
- C. Harmonic mean of layer permeabilities
- D. Maximum permeability of the layers
Explanation
For flow perpendicular to soil layers, the equivalent permeability is obtained from a thickness-weighted harmonic mean. The arithmetic mean is associated with flow parallel to layers, making it the common trap.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
About Soil Mechanics and Foundations
Soil mechanics examines index properties, phase relationships, classification, permeability, seepage, compaction, consolidation, shear strength and earth pressure. Foundations apply these principles to bearing capacity, settlement and shallow or deep foundation selection, with clear distinction between compaction, which expels air, and consolidation, which expels water over time.
Practise Soil Mechanics and Foundations
78 free Soil Mechanics and Foundations MCQs from Civil Engineering, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Civil Engineering questions like this
Civil Engineering is on 3 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Soil Mechanics and Foundations questions
The activity of a clay is defined as the ratio of its plasticity index to the:
The liquidity index of a fine-grained soil is calculated as:
In a direct shear test, the shear strength parameters of a soil are commonly obtained by plotting shear stress at failure against:
Secondary consolidation settlement of a clay occurs mainly because of:
In an unconsolidated undrained triaxial test, the soil specimen is:
For a cohesionless soil, the bearing capacity contribution represented by the term one-half gamma B N-gamma mainly depends on the: