Multiple choice

Which of the following apparatus is used to measure the relative humidity of air?

  1. Maximum - minimum thermometer

  2. Rain gauge

  3. Stethoscope

  4. Hygrometer

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A hygrometer is specifically designed to measure relative humidity (the amount of water vapor in air compared to the maximum it can hold at that temperature). Maximum-minimum thermometers measure temperature range, rain gauges measure precipitation, and stethoscopes are medical instruments for listening to body sounds.

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