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Mechanical Engineering :: Steam Nozzles and Turbines

  1. The stage efficiency (ηS) is given by (where ηB = Blading efficiency, and ηN = Nozzle efficiency)

  2. A.

    ηS = ηB x ηN

    B.

    ηS = ηBN

    C.

    ηS = ηNB

    D.

    none of these

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  3. The critical pressure ratio for initially dry saturated steam is more as compared to initially wet steam.

  4. A.

    Yes

    B.

    No

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  5. In a convergent divergent nozzle, the discharge depends upon the initial conditions of steam and the area of nozzle at throat.

  6. A.

    Correct

    B.

    Incorrect

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  7. Parson's reaction turbine is a __________ reaction turbine.

  8. A.

    40 percent

    B.

    50 percent

    C.

    60 percent

    D.

    70 percent

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  9. The turbine blades are

  10. A.

    straight

    B.

    circular

    C.

    curved

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