Discussion
Which of the following best explains why a spiral separator needs no power?
Answer: D
Correct answer: Gravity feed and no moving parts
A spiral separator is a helical chute with nothing that turns or vibrates. The material is fed at the top and descends under gravity, and the separation comes from the difference between rolling and sliding as it goes: round seeds accelerate, are thrown outward and leave over the edge, while flat ones stay on the inner track. There is nothing to drive.
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