171. 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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172. What is relative humidity ?

1. 1. It is the ratio of specific humidity

   
   
   

   2. It is the indicator of moisture content in the atmosphere

   
   
   

   3. It implies maximum vapour pressure in the atmosphere

   
   
   

   4. It is present everywhere

   
   
   

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   NA

   Correct Option: A

   NA

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173. Which of the following statement is true

1. 1. Saturated air has a relative humidity of 100%

   
   
   

   2. Air with a relative humidity in excess of 100% is said to be supersaturated

   
   
   

   3. Relative humidity is measured with a hygrometer

   
   
   

   4. All of the above

   
   
   

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   NA

   Correct Option: D

   NA

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174. The relative humidity of a region is low when

1. 1. The wet and dry bulb thermometers read the same

   
   
   

   2. The difference between the readings of the wet and dry bulb thermometers is large

   
   
   

   3. The temperatures are high

   
   
   

   4. The temperatures are low

   
   
   

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   NA

   Correct Option: B

   NA

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175. Condensation is a process which occurs when

1. 1. temperature falls below 0^°C

   
   
   

   2. absolute humidity becomes equal to relative humidity

   
   
   

   3. temperature in the air parcel remains static

   
   
   

   4. relative humidity becomes 100% and more

   
   
   

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   NA

   Correct Option: D

   NA

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