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Mechanical Engineering :: Steam Nozzles and Turbines

  1. A closed vessel made of steel and used for the generation of steam is called a

  2. A.

     Steam boiler

    B.

     Steam turbine

    C.

     Steam condenser

    D.

     Steam injector


  3. The ratio of heat equivalent to brake power to the energy supplied in steam is known as

  4. A.

     Mechanical efficiency

    B.

     Overall efficiency

    C.

     Indicated thermal efficiency

    D.

     Brake thermal efficiency


  5. A condenser in a steam power plant

  6. A.

     Increases expansion ratio of steam

    B.

     Reduces back pressure of steam

    C.

     Reduces temperature of exhaust steam

    D.

     All of these


  7. Vacuum for reciprocating steam engines compared to steam turbines is

  8. A.

     More

    B.

     Equal

    C.

     Less

    D.

     Could be more or less depending on the size of plant


  9. In order to compare the capacity of boilers, the feed water temperature and working pressure are taken as

  10. A.

     50°C and normal atmospheric pressure

    B.

     50°C and 1.1 bar pressure

    C.

     100°C and normal atmospheric pressure

    D.

     100°C and 1.1 bar pressure


  11. The evaporation of 15.653 kg of water per hour from and at 100°C is called

  12. A.

     Evaporative capacity

    B.

     Factor of evaporation

    C.

     Equivalent evaporation

    D.

     One boiler h.p.


  13. The ratio of total useful heat drop to the total isentropic heat drop, is called

  14. A.

     Stage efficiency

    B.

     Internal efficiency

    C.

     Rankine efficiency

    D.

     None of these


  15. With increase in load, radiant superheater has

  16. A.

     Drooping characteristic

    B.

     Linear characteristic

    C.

     Rising characteristic

    D.

     Flat characteristic


  17. When the cross-section of a nozzle increases continuously from entrance to exit, it is called a

  18. A.

     Divergent nozzle

    B.

     Convergent nozzle

    C.

     Convergent-divergent nozzle

    D.

     None of these


  19. The number of drums in Benson steam generator is

  20. A.

     One

    B.

     Two

    C.

     One steam drum and one water drum

    D.

     No drum