Question Bank • QB_APE_EXP_100 NAT • 2 Marks

Section 6: Agricultural Process Engineering

Processing of Agriculture Produce

Subtopic: Processing of seeds, spices, fruits and vegetables

Question Statement:

In an oil extraction plant, $1000\text{ kg}$ of mustard seed containing $36\%$ oil is expeller pressed, leaving a residual oil cake containing $8\%$ oil. If the moisture loss during processing is negligible and $300\text{ kg}$ of clear oil is recovered, calculate the oil extraction recovery efficiency in percentage of total oil initially present.

Answer Key:

83.33

Step-by-Step Solution & Explanation

Total initial oil in seed: $O_{\text{total}} = 1000 \times 0.36 = 360\text{ kg}$ Recovered oil $O_{\text{rec}} = 300\text{ kg}$. Extraction recovery efficiency: $\eta = \frac{O_{\text{rec}}}{O_{\text{total}}} \times 100 = \frac{300}{360} \times 100 = 83.33\%$
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