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Chemical Engineering :: Chemical Engineering Basics-2

  1. Use of economiser in a boiler plant reduces the fuel consumption for steam generation by about __________ percent.

  2. A.

     1

    B.

     10

    C.

     30

    D.

     45


  3. Joule-Thomson co-efficient is the ratio of

  4. A.

     Pressure change to temperature change occuring during adiabatic compression of a gas

    B.

     Pressure change to temperature change occuring during adiabatic throttling of a gas

    C.

     Temperature change to pressure change occuring during adiabatic compression of a gas

    D.

     Temperature change to pressure change occuring during adiabatic throttling of a gas


  5. Percentage of argon (by volume) in dry atmospheric air is about

  6. A.

     0.09

    B.

     0.3

    C.

     0.57

    D.

     0.94


  7. Iron has got __________ isotopes.

  8. A.

     No

    B.

     Four

    C.

     Three

    D.

     Two


  9. Addition of __________ to steel does not help in improving its machinability.

  10. A.

     Sulphur

    B.

     Silicon

    C.

     Lead

    D.

     Phosphorous


  11. Density in the solid state is slightly less than that in its liquid state, in case of

  12. A.

     Carbon dioxide

    B.

     Water

    C.

     Mercury

    D.

     None of these


  13. On an average __________ fast neutrons are produced by nuclear fission of each atom of uranium⁻²35.

  14. A.

     1

    B.

     2.5

    C.

     3.5

    D.

     5


  15. A dummy activity is used in PERT network to describe the

  16. A.

     Precedence relationship

    B.

     Resource idleness

    C.

     Resource restriction

    D.

     Necessary time delay


  17. __________ method of depreciation calculation ensures that the interest is charged on the cost of machine asset every year on the book value, but the rate of depreciation remains constant every year.

  18. A.

     Annuity charging

    B.

     Atraight line

    C.

     Ainking fund

    D.

     None of these


  19. Eutectoid composition of carbon steel at room temperature is

  20. A.

     Cementite

    B.

     Pearlite

    C.

     Martensite

    D.

     Ferrite