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Exhaust gas recirculation at \( 15 \) per cent replaces that fraction of the fresh charge. Of \( 400 \) mg of charge per cycle, the recirculated mass is

  • A.60 mg
  • B.340 mg
  • C.26.7 mg
  • D.6 mg

Answer: A

Fifteen per cent of four hundred milligrams is sixty. That inert fraction absorbs combustion heat without releasing any, which is exactly how it lowers the peak temperature and the thermal nitrogen oxide formation with it.

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