The instrument that measures and records the relative humidity of air is – (1) Hydrometer (2) Hygrometer (3) Lactometer (4) Barometer

The instrument that measures and records the relative humidity of air is – (1) Hydrometer (2) Hygrometer (3) Lactometer (4) Barometer
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(2) Hygrometer Explanation: A hygrometer is an instrument used for measuring the moisture content in the environment. Humidity measurement instruments usually rely on measurements of some other quantity such as temperature, pressure, mass or a mechanical or electrical change in a substance as moisture is absorbed. By calibration and calculation, these measured quantities can lead to a measurement of humidity.
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The mass of water vapour per unit volume of air is known as - (1) relative humidity (2) specific humidity (3) absolute humidity (4) variable humidity

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Amount of water vapour (gaseous) in a given volume of air (cubic metre) is known as: (1) Mixing ratio (2) Relative humidity (3) Absolute humidity (4) Specific humidity

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Last Answer : (3) Absolute humidity Explanation: The relative humidity of air at a given temperature is the ratio of mass of water vapour actually present in a certain volume of air to the mass of water vapour required to saturate the same volume of air at the same temperature, multiplied by 100.

Amount of water vapour in a unit volume (Cubic metre) of air is called: (1) Mixed ratio (2) relative humidity (3) absolute humidity (4) specific humidity

Description : Amount of water vapour in a unit volume (Cubic metre) of air is called: (1) Mixed ratio (2) relative humidity (3) absolute humidity (4) specific humidity

Last Answer : (3) absolute humidity Explanation: Absolute humidity is the measure of water vapor (moisture) in the air, regardless of temperature. It is expressed as grams of moisture per cubic meter of air (g/m3).

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Description : The humidity of air measured in percentage is called – (1) absolute humidity (2) specific humidity (3) relative humidity (4) all of these

Last Answer : (3) relative humidity Explanation: The relative humidity is the percent of saturation humidity, generally calculated in relation to saturated vapour density.

Amount of water vapour (gaseous) in a given volume of air (cubic metre) is known as: (1) Mixing ratio (2) Relative humidity (3) Absolute humidity (4) Specific humidity

Description : Amount of water vapour (gaseous) in a given volume of air (cubic metre) is known as: (1) Mixing ratio (2) Relative humidity (3) Absolute humidity (4) Specific humidity

Last Answer : Absolute humidity

Which is an instrument which measures insulation resistance of an electric circuit relative to earth and one another?

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Last Answer : (D) All 'a', 'b' & 'c

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Last Answer : ANSWER: A -- RESPIROMETER 

___________ is device that measures the internal open circuit voltage of an equivalent noise generator having an impedance of 600Ω and delivering noise power to a 600 Ω load. A. Psophometer B. Barometer C. Reflectometer D. Voltmeter

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Last Answer : A. Psophometer

Hydroscope is an instrument that shows changes in: (1) Sound under water (2) Atmospheric humidity (3) Density of liquid (4) None of these

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What does 60% relative humidity mean ?

Description : What does 60% relative humidity mean ?

Last Answer : The ratio of water vapor in air to water vapor in air is 60 % .

Relative humidity is expressed as – (1) Grams (2) Kilograms (3) Percentage (4) Ratio

Description : Relative humidity is expressed as – (1) Grams (2) Kilograms (3) Percentage (4) Ratio

Last Answer : (3) Percentage Explanation: Relative humidity is the amount of moisture in the air compared to what the air can "hold" at that temperature. It signifies the mass of water vapour present in the air ... of the mass that would be present in an equal volume of saturated air at the same temperature.