Discussion
Consider the following pairs of quality measure and what it indicates:
Ash content of flour - Bran contamination
Head rice yield - Proportion of whole kernels
Extraction rate - Flour obtained per unit wheat
Degree of milling - Moisture removed during whitening
How many of the pairs given above are correctly matched?
Answer: D
Correct answer: Only three
Three pairs are right. Flour ash indicates bran contamination, since the bran and aleurone are far richer in minerals than the endosperm; head rice yield is the proportion of whole kernels; and extraction rate is the flour obtained per unit of wheat.
The fourth is wrong. Degree of milling is the proportion of bran removed during whitening, not moisture. Whitening removes bran layers and germ by abrasion; the moisture change across it is incidental and is not what the term measures.
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