Which of the following thermocouples is incapable of measuring sub-zer – McqOptions

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1.	Which of the following thermocouples is incapable of measuring sub-zero (i.e., < 0°C) temperature ?
A.	Chromel-alumel
B.	Iron-constantan
C.	Platinum-platinum + rhodium
D.	Copper-constantan
Answer» D. Copper-constantan

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