Question Bank • QB_EXP_APE_DRY_014 NAT • 1 Mark

Section 6: Agricultural Process Engineering

Grain Drying Principles & Thin Layer Models

Subtopic: Conversion of wet basis to dry basis moisture content

Question Statement:

A sample of harvested maize has a moisture content of $28.0\%$ on wet basis. The moisture content of the maize on dry basis is ________ $\%$ (round off to two decimal places).

Answer Key:

38.89

Step-by-Step Solution & Explanation

The relationship between dry basis moisture content ($M_d$) and wet basis ($M_w$) is: $M_d = \frac{M_w}{1 - M_w}$ Given $M_w = 0.280$: $M_d = \frac{0.280}{1 - 0.280} = \frac{0.280}{0.720} = 0.3889$ In percentage: $M_d = 38.89\%$.
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