Multiple choice

In a compaction test, G, w, S and e represent the specific gravity, water content, degree of saturation and void ratio of the soil sample respectively. If yw represents the unit weight of water and yd represents the dry unit weight of the soil, the equation for zero air voids line is

  1. $y_d \frac{Gy_w}{1 + Se}$
  2. $y_d \frac{Gy_w}{1 + G_W}$
  3. $y_d y\frac{Gy_w}{e + y_wS}$
  4. $y_d \frac{G_w}{1 + Se}$
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