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Railways NTPC (Technical Ability) Utlization of Electrical Energy Question Bank Utlization of Electrical Energy

  • question_answer
    Which of the following devices is necessarily required for automatic temperature control in a furnace?

    A)  Thermocouple

    B)  Thermostat

    C)  Auto-transformer

    D)  Heating elements of variable resistance material

    Correct Answer: B

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