Discussion
A colour sorter inspects \( 12000 \) kernels per second and rejects \( 0.8 \) per cent. The rejection rate is
Answer: D
Correct answer: 96 kernels per second
Apply the rejection percentage to the inspection rate:
\[ 12\,000 \times 0.008 = 96\ \mathrm{kernels\ per\ second} \]
Each of those must be removed by an air jet firing for a few milliseconds within a window of similar length, which is what sets the demands on the ejector array and its timing. The figure also bears on yield: every good kernel caught alongside a bad one is a loss, so ejector precision is as important as detection sensitivity.
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