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Discussion :: Heat and Mass Transfer

  1. The time constant of a thermocouple is

  2. A.

     The time taken to attain the final temperature to be measured

    B.

     The time taken to attain 50% of the value of initial temperature difference

    C.

     The time taken to attain 63.2% of the value of initial temperature difference

    D.

     Determined by the time taken to reach 100°C from 0°C

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    Answer : Option C

    Explanation :

    The Time Constant of a thermocouple is defined as the time required for the sensor to respond to 63.2% of its total output signal when subjected to a step change in temperature.


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