Question Bank • QB_APE_EXP_091 NAT • 2 Marks

Section 6: Agricultural Process Engineering

Size Reduction and Material Handling

Subtopic: Cleaning and grading

Question Statement:

A specific gravity separator grades cereal seeds having a terminal velocity difference. If wheat grain has a terminal velocity of $9.0\text{ m/s}$ in upward air, calculate the dynamic velocity pressure in $\text{Pa}$ corresponding to this air velocity. (Air density $\rho = 1.20\text{ kg/m}^3$)

Answer Key:

48.6

Step-by-Step Solution & Explanation

Dynamic velocity pressure: $P_v = \frac{1}{2} \rho v^2 = \frac{1}{2} \times 1.20 \times 9.0^2 = 0.60 \times 81 = 48.6\text{ Pa}$
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