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A no-cost or housekeeping measure would be

  • A.recovering the waste heat from a flue by means of an economiser
  • B.switching off idle equipment and correcting set points
  • C.replacing a motor with a higher efficiency class
  • D.installing a variable speed drive on a pump

Answer: B

Turning off compressors during breaks, resetting a thermostat and repairing an air leak cost little or nothing and are usually the first thing implemented. The other three are capital measures needing appraisal and approval.

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