The following thermocouple may be used for measuring temperature upto 1873°K__________________?
Correct answer: C. Platinum-platinum rhodium
- A. Chromel-alumel
- B. Copper-constantan
- C. Platinum-platinum rhodium
- D. Iron-constantan
Explanation
A platinum-platinum-rhodium thermocouple, commonly Type R or Type S, is suitable for very high temperatures approaching 1873 K. Chromel-alumel and the copper- or iron-constantan couples have lower practical temperature limits.
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