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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


  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


  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


  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


  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


  11. Which of the following is steam dial?

  12. A.

     Non-coking bituminous coal

    B.

     Brown coal

    C.

     Pulverized coal

    D.

     Coking bituminous coal


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

  14. A.

     Volume

    B.

     Pressure

    C.

     Entropy

    D.

     Enthalpy


  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


  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


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

  20. A.

     Bismuth

    B.

     Copper

    C.

     Aluminium

    D.

     Nickel