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    Question

    The instrument that measures and records the relative

    humidity of air is –
    A Hydrometer Correct Answer Incorrect Answer
    B Hygrometer Correct Answer Incorrect Answer
    C Lactometer Correct Answer Incorrect Answer
    D Barometer Correct Answer Incorrect Answer

    Solution

    A hygrometer is an instrument used for measuring the moisture content in the environment. Humidity measurement instruments usually rely on measurements of some other quantity such as temperature, pressure, mass or a mechanical or electrical change in a substance as moisture is absorbed. By calibration and calculation, these measured quantities can lead to a measurement of humidity.

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