Process Control and Instrumentation
Emf developed by a thermocouple, while measuring a temperature of 600°C is about 5.5 mV. The type of thermocouple used is

Either A, B or C
Iron-constantan
Platinum-platinum+rhodium
Chromel-alumel

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Process Control and Instrumentation
Time constant is the

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

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