Railways Technical Ability Instrument Mechanical Question Bank Instrument Mechanical

  • question_answer For an impulse turbine with exit angle '\[\phi \]', the maximum hydraulic efficiency is:

    A) \[\left( 1-\frac{\cos \phi }{2} \right)\]                    

    B) \[\left( \frac{1}{2}+\cos \phi  \right)\]

    C) \[\left( \frac{1+\cos \phi }{2} \right)\]                   

    D) \[\left( \frac{1-\cos \phi }{2} \right)\]

    Correct Answer: C


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