Railways R.R.C. (Kolkata) Solved Paper Held on 17-11-2013

  • question_answer
    A thermostat is?

    A) a device which varies the temperature of a bath

    B) an instrument by which the accuracy of thermometers are determined

    C) a device used to maintain a constant tempera-ture of a water bath or an oven

    D) a modem type of thermo flask which works on the principle of equipartition of heat energy

    Correct Answer: C


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