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Railways NTPC (Technical Ability) Engineering Mechanics and Strength of Materials Question Bank Engineering Mechanics

  • question_answer
    For a free vortex design of blade in the rotor of a reaction axial turbine, the specific work along the blade height is:                                

    A) Higher at the blade hub and lower at the blade tip

    B) Constant from huh to tip                  

    C) Lower at the hub and tip but different from the mean section                             

    D) Same at the hub and tip but different from the mean section. 

    Correct Answer: A

    Solution :

    For a free vortex,  \[{{\upsilon }_{w}}\propto \frac{1}{r}\]


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