Civil Engineering MCQAE Level Civil Engineering
For a stratified soil deposit with horizontal layers, the equivalent coefficient of permeability in the VERTICAL direction (k_v) is:
Soil MechanicsCoefficient of PermeabilityMEDIUM
Choose the correct answer
A
Σ(k_i × H_i) / ΣH_i
B
ΣH_i / Σ(H_i/k_i)
C
Average of all layer permeabilities
D
k_v = k_h always
Correct Answer
B. ΣH_i / Σ(H_i/k_i)
AI Detailed Explanation & IS Code Reference
Unlock the reasoning, formula path and code-linked notes inside your student dashboard.
For flow perpendicular to layers (vertical): k_v = ΣH_i / Σ(H_i/k_i) — this is a harmonic average weighted by layer thickness. For flow parallel to layers (horizontal): k_h = Σ(k_i×H_i)/ΣH_i (arithmetic average).
ScoreCardAI links this solution with subject, topic and difficulty signals so your scorecard can identify weak areas after a full mock test.
Concept shortcut
IS/IRC reference
Common trap
Practice more Civil Engineering questions
This MCQ belongs to AE Level Premium Test Series. Full tests include timed attempts, rank comparison and subject-wise analysis.