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The regenerative glass furnace uses a checkerwork of refractory to

  • A.recover heat and preheat the air
  • B.filter particulates from the flue gas
  • C.support the glass melt itself
  • D.distribute the batch across the furnace

Answer: A

The chambers reverse every twenty minutes or so, one heating while the other gives its heat back to the air. Without such recovery the fuel consumption would be far higher than it is. Chamber size is set by the reversal interval.

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