GATE AG 2013 • Q15 MCQ • 1 Mark

Section 4: Soil and Water Conservation Engineering

Soil Mechanics

Subtopic: Engineering properties of soils

Question Statement:

A soil has a void ratio of 0.75 and a specific gravity of 2.66. The value of critical hydraulic gradient at which quick sand condition will occur is

Options:

  • (A) 0.95
  • (B) 1.05
  • (C) 2.09
  • (D) 6.64

Official Answer Key:

A

Step-by-Step Solution & Explanation

Critical hydraulic gradient, i_c = (G_s−1)/(1+e) = (2.66−1)/(1+0.75) = 1.66/1.75 = 0.949 ≈ 0.95. Answer: (A).

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