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
E)mechanical hygrometer

Question

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
E)​mechanical hygrometer

Quizplus · Accepted Answer

A sling psychrometer uses two thermometers - one with a wet bulb and one with a dry bulb - to measure both the dry and the wet temperatures of the air. These readings are then used to calculate the relative humidity of the air using a table or a formula. Therefore, the sling psychrometer is the instrument that uses wet-bulb and dry-bulb temperature to obtain relative humidity.

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