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Railways NTPC (Technical Ability) Turbomachinery Question Bank Turbomachinery

  • question_answer
    A double acting steam engine with a cylinder diameter of 19 cm and a stroke of 30 cm has a cut-off of 0.35. The expansion ratio for this engine is nearly:

    A) 1.05                             

    B) 2.85

    C) 6.65                             

    D) 10.05

    Correct Answer: B

    Solution :

    Expansion ratio \[=\frac{1}{cut\,\,off}=\frac{1}{0.35}=2.85\]


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