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EEE :: Power Plant Engineering in EE

  1. Blowing down of boiler water is the process

  2. A.

     to reduce the boiler pressure

    B.

     to increase the steam temperature

    C.

     to control the solid concentration in the boiler water by removing some of the concentrated saline water

    D.

     none of the above


  3. Reheat cycle in steam power plant is used to

  4. A.

     utilise heat of flue gases

    B.

     increase thermal efficiency

    C.

     improve condenser performance

    D.

     reduce loss of heat


  5. Underfeed stokers work best for __________ coals high in volatile matter and with caking tendency

  6. A.

     Anthracite

    B.

     Lignite

    C.

     Semi-bituminous and bituminous

    D.

     All of the above


  7. The isentropic expansion of steam through nozzle for the steam initially dry saturated at inlet is approximated by equation.

  8. A.

     pv = C

    B.

     pv1A = C

    C.

     pv1i = C

    D.

     pv


  9. Rankine cycle efficiency of a good steam power plant may be in the range of

  10. A.

     15 to 20 per cent

    B.

     35 to 45 per cent

    C.

     70 to 80 per cent

    D.

     90 to 95 per ceut


  11. The efficiency of a modern boiler using coal and heat recovery equipment is about

  12. A.

     25 to 30%

    B.

     40 to 50%

    C.

     65 to 70%

    D.

     85 to 90%


  13. The draught which a chimney produces is called

  14. A.

     induced draught

    B.

     natural draught

    C.

     forced draught

    D.

     balanced draught


  15. Evaporative type of condenser has

  16. A.

     steam in pipes surrounded by water

    B.

     water in pipes surrounded by steam

    C.

     either (A) or (B)

    D.

     none of the above