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Mechanical Engineering :: Steam Nozzles and Turbines

  1. The value of diagram factor depends upon

  2. A.

     Initial conditions of steam

    B.

     Back pressure

    C.

     Initial pressure of steam

    D.

     All of these


  3. The average value of diagram factor lies between

  4. A.

     0.2 to 0.5

    B.

     0.5 to 0.65

    C.

     0.65 to 0.9

    D.

     0.8 to 1.2


  5. Which of the following boilers is best suited to meet fluctuating demands?

  6. A.

     Babcock and Wilcox

    B.

     Locomotive

    C.

     Lancashire

    D.

     Cochran


  7. Degree of reaction is defined as the ratio of

  8. A.

     Heat drop in fixed blades to the heat drop in moving blades

    B.

     Heat drop in moving blades to the heat drop in fixed blades

    C.

     Heat drop in moving blades to the heat drop in fixed blades plus heat drop in moving blades

    D.

     Heat drop in fixed blades plus heat drop in moving blades to the heat drop in moving blades


  9. Hard coke is used in

  10. A.

     Cement industry

    B.

     Thermal power plant

    C.

     Blast furnace

    D.

     Domestic use


  11. In a glass tube type water indicator for a boiler, one end of the tube is connected to water space and the other end is connected to

  12. A.

     Water space also

    B.

     Chimney

    C.

     Steam space

    D.

     Superheater


  13. The cylinder dimensions of a compound engine may be designed on the basis of

  14. A.

     Equal power developed in each cylinder for uniform turning moment

    B.

     Equal initial piston loads on all pistons for obtaining same size of piston rod, connecting rod etc. for all cylinders

    C.

     Equal temperature drop in each cylinder for economy of steam

    D.

     All of the above


  15. The aim of a compound steam engine is

  16. A.

     To reduce the ratio of expansion in each cylinder

    B.

     To reduce the length of stroke

    C.

     To reduce the temperature range in each cylinder

    D.

     All of the above


  17. The diameter of internal flue tubes in a Lancashire boiler compared to its shell is

  18. A.

     One-half

    B.

     One-third

    C.

     Two-fourth

    D.

     Two-fifth


  19. The diameter of fire tube of Cornish boiler compared to its shell is

  20. A.

     One half

    B.

     One third

    C.

     One fourth

    D.

     One fifth