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Mechanical Engineering :: Steam Nozzles and Turbines

  1. The ratio of the actual vacuum to the ideal vacuum in a condenser is called

  2. A.

     Condenser efficiency

    B.

     Vacuum efficiency

    C.

     Nozzle efficiency

    D.

     Boiler efficiency

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  3. In case of non-condensing steam engines, the pressure of steam in the cylinder during exhaust stroke is _________ the condenser pressure.

  4. A.

     Equal to

    B.

     Lower than

    C.

     Higher than

    D.

     None of these

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  5. Steam exhaust from high pressure turbine is reheated in

  6. A.

     Boiler drums

    B.

     Superheater tubes

    C.

     Economizer

    D.

     A separate coil located in convection path

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  7. In an impulse turbine, steam expands

  8. A.

     Wholly in blades

    B.

     Wholly in nozzle

    C.

     Partly in the nozzle and partly in blades

    D.

     None of these

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  9. An ideal regenerative cycle is

  10. A.

     Equal to Carnot cycle

    B.

     Less than Carnot cycle

    C.

     More than Carnot cycle

    D.

     Could be anything

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  11. Which of the following is steam dial?

  12. A.

     Non-coking bituminous coal

    B.

     Brown coal

    C.

     Pulverized coal

    D.

     Coking bituminous coal

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  13. Heating wet steam at constant temperature is heating it at constant

  14. A.

     Volume

    B.

     Pressure

    C.

     Entropy

    D.

     Enthalpy

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  15. A safety valve in a locomotive starts leaking. The leaking medium will be

  16. A.

     Water

    B.

     Dry steam

    C.

     Wet steam

    D.

     Super heated steam

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  17. Which of the following statement is correct for steam turbines as compared to reciprocating steam engines?

  18. A.

     A steam turbine develops higher speeds

    B.

     The efficiency of steam turbine is higher

    C.

     The steam consumption is less

    D.

     All of these

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  19. Fusible plug for boilers is made of fusible metal containing tin, lead, and

  20. A.

     Bismuth

    B.

     Copper

    C.

     Aluminium

    D.

     Nickel

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