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A screening deck is running at design feed rate but effectiveness has fallen steadily over a shift.

What is the most likely cause?

  • A.Progressive blinding
  • B.A rise in feed rate
  • C.A fall in the bed depth
  • D.An increase in the open area

Answer: A

Effectiveness declining at constant feed points to the apertures gradually plugging with near-size or damp material. Ball trays or brushes beneath the deck, which knock the plugged apertures clear, are the standard cure.

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