This instrument uses wet-bulb and dry-bulb temperature to obtain relative humidity:
A) infrared hygrometer
B) sling psychrometer
C) hair hygrometer
D) electrical hygrometer

Question

Quizplus · Accepted Answer

The sling psychrometer uses both wet-bulb and dry-bulb temperature to calculate the relative humidity. It is a simple and widely used instrument for measuring relative humidity in the field. Infrared hygrometers utilize the principle of absorption of infrared radiation to measure humidity. Hair hygrometers are less accurate and less precise than other instruments and electrical hygrometers are used for specialized applications in laboratories.

This Instrument Uses Wet-Bulb and Dry-Bulb Temperature to Obtain Relative