Process Control and Instrumentation
__________ is undesirable in thermocouples used in industries,

Linear relation of emf to temperature
Corrosion resistance
Oxidation resistance
Non-linear relation of emf to temperature

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Process Control and Instrumentation
Time constant is the

Same as dead time
Time taken by the controlled variable to reach 63.2% of its full change
Time required by the measured variable to reach 63.2% of its ultimate change
Same as transportation lag

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