Question Bank • QB_SWCE_EXP_074 MCQ • 1 Mark

Section 4: Soil and Water Conservation Engineering

Soil and Water Erosion

Subtopic: Earthen dams

Question Statement:

In a homogeneous earthen dam without an internal drainage chimney filter, the line separating the saturated seepage zone from the dry zone within the dam body is termed the:

Options:

  • (A) Phreatic line (top flow line)
  • (B) Equipotential threshold
  • (C) Hydraulic grade ceiling
  • (D) Capillary fringe apex

Answer Key:

A

Step-by-Step Solution & Explanation

The phreatic line (seepage line) is the uppermost flow line in an earthen embankment dam along which atmospheric pressure prevails ($p = 0$).
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