Discussion
A rubber roll huller works by
Answer: B
Correct answer: Passing paddy between rolls of unequal speed
A rubber roll huller passes the paddy between two rubber-covered rolls turning in opposite directions at different speeds. The speed differential shears the husk open and strips it away, while the rubber surface cushions the kernel.
That gentleness is the point: compared with the older disc sheller, which abrades the grain between emery-coated discs, the rubber roll causes far less breakage and gives a markedly better head rice yield. The cost is roll wear, since the rubber is consumed and must be replaced regularly.
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