The relationship between γ and γ_d can e derived when the degree of saturation is______
a) 0
b) 0.5
c) 0.8
d) 1

Answer: a
Explanation: The bulk unit weight is given by,
γ = \(\frac{(G+e)S γ_w}{(1+e)}\)
When the degree of saturation S=0,
the unit weight is \(\frac{(G+e) γ_w}{(1+e)}\) which is equal to γ_d
\(γ_d = \frac{Gγ_w}{(1+e)}\)
When the degree of saturation S=1,
the unit weight is \(\frac{(G+e) γ_w}{(1+e)}\) which is equal to γ_sat
\(γ_{sat}=\frac{(G+e) γ_w}{(1+e)}\).