UPSC General Studies Sample Paper General Studies Sample Paper-10

  • question_answer
    Which of the following is/are causes of thermal pollution?                               
    1. Use of water as coolant.                                                                 
    2. Storm water by power plants.                                                          
    3. Silting effect in the rivers.                                                              
    Select the correct answer using the codes given below.                                    

    A)  Only 1             

    B)  1 and 2      

    C)        1 and 3           

    D)  All of these                           

    Correct Answer: B

    Solution :

    [b] Thermal pollution is the degradation of water quality by any process that changes ambient water temperature. A common cause of thermal pollution is the use of water as a coolant, storm water by power plants and industrial manufacturers. When water used as a coolant is returned to the natural environment at a higher temperature, the change in temperature decreases oxygen supply and effects ecosystem composition.

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