41. The mass of water vapour divided by the mass of dry air in a volume of air at a given temperature is called

1. 1. Absolute humidity

   
   
   

   2. Specific humidity

   
   
   

   3. Relative humidity

   
   
   

   4. Humidity during rain

   
   
   

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   NA

   Correct Option: A

   NA

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42. 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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43. 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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44. 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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45. Which of the following statements is / are correct about convection ?

1. 1. The act of process of conveying ; transmission

   
   
   

   2. Heat transfer in a gas or liquid by the circulation of currents from one region to another

   
   
   

   3. The transfer of heat or other atmospheric properties by massive motion within the atmosphere especially by such motion directed upward

   
   
   

   4. All of the above

   
   
   

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   NA

   Correct Option: D

   NA

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