Allied & ICAR Exam Bank • ALLIED_1256 NAT • 2 Marks

Section 6: Agricultural Process Engineering

Psychrometry and Grain Drying

Subtopic: Thin Layer Drying - Page's Equation

Question Statement:

In a thin-layer grain drying process governed by Page's equation with drying constant $k = 0.05\text{ min}^{-1}$ and index $n = 1.0$, given $e^{-1} \approx 0.368$, the moisture ratio $MR$ at time $t = 20\text{ minutes}$ is:

Answer Key:

0.368

Step-by-Step Solution & Explanation

$MR = \exp(-0.05 \times 20^1) = \exp(-1.0) \approx 0.3679$.
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