Process Engineering Division – Instrumentation and Automation Section – Daily Question – Question dated 2020-02-05
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Process Engineering Division – Instrumentation and Automation Section – Daily Question – Question from 2020-02-05: Fill-in-the-blank question: 20. The conditions under which a thermocouple generates a thermoelectric potential are: ( ), ( ). Answer: The materials of the two thermal electrodes are different; the temperatures at the two ends of the thermocouple are different
The materials of the two thermal electrodes are different; the temperatures of the two contacts are different
The materials of the two thermal electrodes are different; the temperatures of the two contacts are different
The two thermoelectric electrode materials are different； The temperatures of the two contacts are different
Two different metals, welded together, with a temperature difference at both ends
Two different metals, welded together, with a temperature difference at both ends
A thermocouple must be composed of two different conductors, and the temperatures at its two junctions must be different.
The two electrode materials are different, and the temperatures at the two contacts are different
Different metals in contact with each other: 2. There is a temperature difference
Two different metals, welded together, with a temperature difference at both ends