UPSC General Studies Solved Paper - General Studies-2011

  • question_answer
    The jet aircrafts fly very easily and smoothly in the lower stratosphere. What could be the appropriate explanation?
    1. There are no clouds or water vapour in the lower stratosphere.
    2. There are no vertical winds in the lower stratosphere.
    Which of the statement(s) given above is/are correct?

    A)  Only-1             

    B)  Only 2

    C)  Both 1 and 2                

    D) Neither1nor 2

    Correct Answer: C

    Solution :

    Exp. [c] Clouds and thunderstorms are dangerous to aircraft and water vapours and other weather phenomena causes changes in air density, which too is not optimal for flight. Most importantly a jet aircraft achieves most efficient flight in low density air. Vertical winds or convection currents due to weather activity causes turbulence which too is dangerous to flight. In normal circumstances, a jet aircraft will fly around a thunderstorm.

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