Q. The temperature of tempering oil baths maintained at 400°C during heat treatment of steel is measured by a/an __________ thermocouple.

  • (A) Chromel-alumel
  • (B) Iron-constantan
  • (C) Platinum-platinum/rhodium
  • (D) None of these
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✅ Correct Answer: (B) Iron-constantan

Published by Ram Sharma ⭐ 193.88K Points at 04-Jul-2023 03:39 pm in Process Control And Instrumentation

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