Civil Engineering PE

Answer: C - The void ratio of a 200 gram soil sample with an 80% degree of saturation and a moisture content of 20.5% is 67%.

Solution: Use the following equation to determine the void ratio, e

e = Specific gravity x moisture content / degree of saturation

= G_S x W / S

Given specific gravity, G_S = 2.6

moisture content, W = 20.5 %

degree of saturation, S = 80%

Therefore, e = [(2.6 x 20.5) / 80] x 100

e = 67%