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2017 · Q76

Which one of the following instruments is used for measuring moisture content of air?

general-sciencephysics-mechanics
  1. AHydrometer
  2. BHygrometer
  3. CHypsometer
  4. DPycnometer

Explanation

A hygrometer measures the moisture content (humidity) of air. A hydrometer measures the density of liquids, a hypsometer determines altitude via the boiling point of water, and a pycnometer measures the density of solids or liquids. Hence (B).