If it is desired to determine the temperature difference between two locations using thermocouples, what wiring technique can be used to accomplish this?

Correct Answer: Option A — The two thermocouples would be wired in series-opposing to measure the difference between the two temperatures.

Wiring two thermocouples in series-opposing causes their generated voltages to subtract from one another. The resulting net voltage is directly proportional to the temperature difference between the two junctions. This technique is commonly used in differential temperature monitoring for heat exchangers and cooling systems.