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Exhaust gas temperature is measured using

  • A.A chain of thermocouples in parallel around the gas path
  • B.A platinum resistance thermometer
  • C.A bimetallic strip
  • D.An infrared pyrometer at the tailpipe

Answer: A

Several thermocouples wired in parallel give an average around the annulus, which matters because the temperature is far from uniform. The chromel-alumel junction generates its own small voltage and so needs no external excitation.

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