Question Bank • QB_EXP_SWCE_SOIL_004 NAT • 1 Mark

Section 4: Soil and Water Conservation Engineering

Soil Physical Properties & Phase Relationships

Subtopic: Porosity from void ratio

Question Statement:

A sample of agricultural soil has a void ratio of $e = 0.80$. The porosity of the soil sample is ________ $\%$ (round off to two decimal places).

Answer Key:

44.44

Step-by-Step Solution & Explanation

The relationship between porosity $n$ and void ratio $e$ is: $n = \frac{e}{1 + e}$ Given $e = 0.80$: $n = \frac{0.80}{1 + 0.80} = \frac{0.80}{1.80} = 0.4444$ In percentage: $n = 44.44\%$.
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