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In an axial-flow thresher the crop

  • A.Never contacts the concave
  • B.Travels along the axis, over many passes
  • C.Passes across the cylinder in a single pass
  • D.Is fed radially and discharged at once

Answer: B

The helical path gives a much longer residence time, so threshing and separation happen together over the whole cylinder length. It handles damp and tough material well but consumes more power than a tangential machine.

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