A Thermocouple is used to measure high temprature provided the tempratures measured

Question

Thermocouples are used to measure high temperatures provided the temperatures measured

a. do not exceed the melting points of the wires in the thermocouple

b. are equal to the melting points of the wires in the thermocouple

c.  are not more than the boiling point of water

d. are above 0K

Answer 1

A is the correct answer. A thermocouple is only good as long as the difference in the expansion of the coupled metals is possible. At melting, the expansion of one or both will go into a different parameter altogether.

Mr. A