4937Chemical EngineeringMedium
Temperature of molten pig iron (1450°C) and molten slag (1500°C) flowing out of a blast furnace is measured by a/an________?
AChromel-alumel thermocouple
BRadiation pyrometer
COptical pyrometer
DEither B. or C.
Correct answer
D. Either B. or C.
Explanation
The correct answer is Either B. or C..