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Mechanical Engineering :: Steam Nozzles and Turbines

  1. The expansion of steam in a nozzle follows

  2. A.

     Carnot cycle

    B.

     Rankine cycle

    C.

     Joule cycle

    D.

     Stirling cycle


  3. In a uniflow engine

  4. A.

     Steam enters and exhausts through the same port

    B.

     Steam enters at one end and exhausts at the centre

    C.

     Steam enters at the centre and exhausts at the other end

    D.

     None of the above


  5. The mechanical draught _________ with the amount of smoke.

  6. A.

     Increases

    B.

     Decreases

    C.

     Does not effect

    D.

     None of these


  7. Gradually increasing temperature of flue gases at inlet to chimney for given steam outputs is an indication of

  8. A.

     Higher effectiveness of boiler

    B.

     High calorific value coal being burnt

    C.

     Fouling of heat transfer surfaces

    D.

     Raising of steam temperature


  9. A _________ in a boiler is used to put off fire in the furnace of the boiler when the level of water in the boiler falls to an unsafe limit.

  10. A.

     Blow off cock

    B.

     Fusible plug

    C.

     Stop valve

    D.

     Safety valve


  11. The radius of a dished head is taken approximately as

  12. A.

     One fourth

    B.

     Half

    C.

     One

    D.

     Two


  13. Boiler parameters are expressed by

  14. A.

     Tonnes/hr. of steam

    B.

     Pressure of steam in kg/cm²

    C.

     Temperature of steam in °C

    D.

     All of the above


  15. The high pressure and low pressure cylinders in a Woolf type compound engine are regarded as having cranks

  16. A.

     180° to each other

    B.

     90° to each other

    C.

     0° to each other

    D.

     None of these


  17. The high pressure and low pressure cylinders in a Tandem type compound engine are regarded as having cranks

  18. A.

     180° to each other

    B.

     90° to each other

    C.

     0° to each other

    D.

     None of these


  19. The high pressure and low pressure cylinders in a receiver type compound engine are regarded as having cranks

  20. A.

     180° to each other

    B.

     90° to each other

    C.

     0° to each other

    D.

     None of these