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Mechanical Engineering :: Steam Nozzles and Turbines

  1. The high steam and low water safety valve is not used in

  2. A.

     Cochran boiler

    B.

     Cornish boiler

    C.

     Lancashire boiler

    D.

     Locomotive boiler


  3. Which device is used in thermal power plants to reduce level of pollution?

  4. A.

     Induced draft fan

    B.

     Smoke meter

    C.

     Chimney

    D.

     Precipitator


  5. The pressure at which latent heat of vaporisation of water is zero, is

  6. A.

     Below atmospheric pressure

    B.

     1 kg/cm²

    C.

     100 kg/cm²

    D.

     225.6 kg/cm²


  7. The water tubes in a Babcock and Wilcox boiler are

  8. A.

     Horizontal

    B.

     Vertical

    C.

     Inclined

    D.

     Horizontal and inclined


  9. For combustion of a fuel, following is essential

  10. A.

     Correct fuel air ratio

    B.

     Proper ignition temperature

    C.

     O₂ to support combustion

    D.

     All the three above


  11. The diagram efficiency is the ratio of

  12. A.

     Workdone on the blades to the energy supplied to the blades

    B.

     Workdone on the blades per kg of steam to the total energy supplied per stage per kg of steam

    C.

     Energy supplied to the blades per kg of steam to the total energy supplied per stage per kg of steam

    D.

     None of the above


  13. The nozzle efficiency is the ratio of

  14. A.

     Workdone on the blades to the energy supplied to the blades

    B.

     Workdone on the blades per kg of steam to the total energy supplied per stage per kg of steam

    C.

     Energy supplied to the blades per kg of steam to the total energy supplied per stage per kg of steam

    D.

     None of the above


  15. The specific heat of superheated steam in kcal/kg is generally of the order of

  16. A.

     0.1

    B.

     0.3

    C.

     0.5

    D.

     0.8


  17. Efficiency of a thermal cycle increases by

  18. A.

     Regeneration

    B.

     Reheating of steam

    C.

     Both (A) and (B)

    D.

     Cooling of steam


  19. The actual power generated in the engine cylinder is called

  20. A.

     Indicated power

    B.

     Brake power

    C.

     Frictional power

    D.

     None of these