166. Humidity refers to

1. 1. Brackishness of water

   
   
   

   2. Latent heat

   
   
   

   3. Water vapour in the atmosphere

   
   
   

   4. None of these

   
   
   

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   NA

   Correct Option: D

   NA

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167. Which of the following instruments is used to measure humidity ?

1. 1. Kata Thermometer

   
   
   

   2. Anemometer

   
   
   

   3. Sling psychrometer

   
   
   

   4. clinical Thermometer

   
   
   

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   NA

   Correct Option: C

   NA

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168. Relative humidity refers to

1. 1. Absolute amount of water vapour in the atmosphere

   
   
   

   2. The amount of hygroscopic nuclei in the atmosphere

   
   
   

   3. Saturated vapour pressure

   
   
   

   4. Ration of actual amount of water vapour in the air to the amount it could hold at the temperature

   
   
   

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   NA

   Correct Option: D

   NA

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169. All of the following statements are true except

1. 1. Relative humidity of a mass of air falls if the temperature of the air rises

   
   
   

   2. Air is saturated when its relative humidity is 100%

   
   
   

   3. When air subsides its relative humidity decreases

   
   
   

   4. The relative humidity of a mass of air remains constant when the air crosses over a cold land surface from a warm water surface

   
   
   

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   NA

   Correct Option: D

   NA

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170. Specific humidity is

1. 1. The indecator of density of water vapour

   
   
   

   2. The maximum water content existing in the atmosphere

   
   
   

   3. It is the ratio of the mass of water vapour present to the total mass of air

   
   
   

   4. None of the above

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

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