

MCQOPTIONS
Saved Bookmarks
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 | |