The temperature of tempering oil baths maintained at 400¬∞C during – McqOptions

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1.	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.
Answer» C. platinum-platinum/rhodium

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