Sling Psychrometer is used to measure-
High-Yield Explanation
Ans. is 'd' i.e., Humidity Instruments MeasureSling psychrometer} Assmann psychrometerHumidityDry & wet bulb hygrometer Kata thermameter-Cooling power and air velocityGlobe thermameter-Radiant tempratureAnemometer-Air velocityWind vane-Wind (air) directionSound level meter-Intensity of soundBond frequency analyzer-Characteristic (pitch) of sound