Allied & ICAR Exam Bank • ALLIED_1272 NAT • 2 Marks

Section 6: Agricultural Process Engineering

Engineering Properties of Grains

Subtopic: Porosity

Question Statement:

Bulk wheat grain has a measured bulk density $\rho_b = 780\text{ kg/m}^3$ and a true grain density $\rho_t = 1300\text{ kg/m}^3$. The bed porosity $\epsilon = \left(1 - \frac{\rho_b}{\rho_t}\right) \times 100$ in % is:

Answer Key:

40.0

Step-by-Step Solution & Explanation

$\epsilon = \left(1 - \frac{780}{1300}\right) \times 100 = (1 - 0.60) \times 100 = 40.0\%$.
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