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Chemical Engineering :: Chemical Engineering Basics-2

  1. Which of the following metals reacts violently with water ?

  2. A.

     Mercury

    B.

     Sodium

    C.

     Calcium

    D.

     Magnesium

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  3. The process of removal of scale formed during hot rolling of steel is termed as

  4. A.

     Descaling

    B.

     Shot blasting

    C.

     Pickling

    D.

     Skimming

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  5. Silicon crystal can be converted to p-type semi-conductor by doping with

  6. A.

     Phosphorous

    B.

     Nitrogen

    C.

     Carbon

    D.

     Boron

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  7. During sensible heating of humid air

  8. A.

     Relative humidity increases

    B.

     Dew point remains constant

    C.

     Dry bulb & wet bulb temperature increases

    D.

     Both 'b' & 'c'

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  9. At the point of boundary layer separation in fluid flow, the

  10. A.

     Shear stress is maximum

    B.

     Velocity gradient is flat

    C.

     Density variation is maximum

    D.

     Shear stress is zero

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  11. The most suitable material of construction for a sewer to carry sewage under high pressure is

  12. A.

     Asbestos cement

    B.

     Steel

    C.

     Cement concrete

    D.

     Stoneware

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  13. Stretcher strains found in a low carbon sheet are associated with the

  14. A.

     Texture

    B.

     Dislocation density

    C.

     Yield point phenomenon

    D.

     Thickness of the sheet

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  15. For hardening high alloy steel, it is to be heated slowly and uniformly to avoid

  16. A.

     Local hardening

    B.

     Scale formation

    C.

     Segregation

    D.

     Warpage

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  17. To improve the machinability of steel by its softening, it is subjected to

  18. A.

     Cold working

    B.

     Annealing

    C.

     Shot blasting

    D.

     Heating

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  19. A compact estimate about the amount of materials handling between various work stations is obtained from the

  20. A.

     Gantt chart

    B.

     Bin chart

    C.

     String diagram

    D.

     Travel chart

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