Question

Hygrometer is used for estimating:
1. water vapour content of air
2. water content of soil
3. capillary potential of soil water
4. specific gravity of a liquid

Answer 1

Correct Answer - Option 1 : water vapour content of air

Explanation

Devices	Purpose
Pitot tube	Velocity of flow in rivers or Open channel flow velocity measurement
Hygrometer	A hygrometer is an instrument used to measure relative humidity. Humidity is the measure of the amount of moisture in the air. A psychrometer is an example of a hygrometer
Orifice Meter	Discharge in pipe
Tensiometer	The capillary potential of soil water
Piezometer	Measurement of low pressure at any point in pipe flow
Single column manometer	Measurement of high pressure at any point in pipe flow.
Differential manometer	Measurement of the difference in pressures between two points in a pipe.
Spring Balance	Measures weight or Force acting on the object by measuring the tension of a spring.
Barometer	Measurement of atmospheric pressure