The temperature of tempering oil baths maintained at 400°C during hea – McqOptions

MCQOPTIONS

1.	The temperature of tempering oil baths maintained at 400°C during heat treatment of steel is measured by a/an __________ thermocouple.
A.	iron-constantan
B.	chromel-alumel
C.	none of these
D.	platinum-platinum/rhodium
Answer» B. chromel-alumel

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