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A line rated at 6 t/h is found to deliver only 4.5 t/h, and material accumulates ahead of one machine.

What should be done first?

  • A.Increase the feed rate
  • B.Reduce the feed rate to match the output
  • C.Uprate the limiting stage, then the next
  • D.Uprate every stage equally

Answer: C

Correct answer: Uprate the limiting stage, then the next

The line is delivering the capacity of its slowest stage, and material accumulating in front of one machine identifies it. Uprate that one, then look again - the next slowest becomes the constraint, and debottlenecking proceeds one stage at a time. Uprating everything equally would spend far more for the same result.

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