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Chemical Engineering :: Chemical Engineering Basics-2

  1. __________ is the most important element, which controls the physical properties of steel.

  2. A.

     Manganese

    B.

     Silicon

    C.

     Carbon

    D.

     Vanadium


  3. Friction factor for fluid flow in pipe does not depend upon the

  4. A.

     Pipe length

    B.

     Pipe roughness

    C.

     Fluid density & viscosity

    D.

     Mass flow rate of fluid


  5. Transition from laminar flow to turbulent flow in fluid flow through a pipe does not depend upon the

  6. A.

     Length of the pipe

    B.

     Diameter of the pipe

    C.

     Density of the fluid

    D.

     Velocity of the fluid


  7. The property of material, by which a given amount of energy is absorbed by it, without plastic deformation is called

  8. A.

     Resilience

    B.

     Toughness

    C.

     Ductility

    D.

     Impact strength


  9. Filler material used in welding having the lowest melting point out of the following is

  10. A.

     Aluminium

    B.

     Soft solder

    C.

     Silver solder

    D.

     Brazing spelter


  11. A cylinderical rod subjected to a tensile strain within the elastic limit undergoes a volume change. If the volume strain is equal to half the tensile strain, then the Poisson's ratio of the rod is

  12. A.

     0

    B.

     0.33

    C.

     0.44

    D.

     0.25


  13. Lime contains about 90% CaO. Percentage CaO present in limestone is about

  14. A.

     25

    B.

     50

    C.

     70

    D.

     80


  15. Limestone addition in the blast furnace is done to flux __________ present in the raw materials.

  16. A.

     SiO₂

    B.

     Al2O₃

    C.

     MnO₂

    D.

     P


  17. The most detrimental impurity in high pressure boiler feed water is

  18. A.

     Suspended salt

    B.

     Dissolved salt

    C.

     Silica

    D.

     Turbidity


  19. Air/fuel ratio by weight for combustion of methane with theoretical quantity of air will be about

  20. A.

     9:1

    B.

     17 : 1

    C.

     23 : 1

    D.

     29 : 1