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Chemical Engineering :: Chemical Engineering Basics

  1. In the acid Bessemer process, the hot metal should have the following com-positon.

  2. A.
    S < 0.05% and P < 0.05%.
    B.
    S < 0.05% and P < 1.5%.
    C.
    S < 0.05% and P > 1.5%.
    D.
    S > 1.5% and P < 0.05%.

  3. Which of the following does not come under the category of electrochemical corrosion ?

  4. A.
    Corrosion in organic liquids.
    B.
    Atmospheric corrosion in moist gas or air.
    C.
    Soil corrosion as in the case of underground pipes.
    D.
    Corrosion in sea water and molten metals.

  5. Unbreakable crockeries are made from __________ polymers.

  6. A.
    polystyrene
    B.
    melamine
    C.
    polystyrene
    D.
    polyurathane

  7. Cupola produces __________ iron..

  8. A.
    pig
    B.
    cast
    C.
    wrought
    D.
    carbon free

  9. Euler number is defined as the ratio of inertia force to __________ force.

  10. A.
    pressure
    B.
    elastic
    C.
    gravity
    D.
    viscous

  11. Holes for rivetting purposes should be preferably made by

  12. A.
    cutting torch
    B.
    drilling
    C.
    punching
    D.
    none of these

  13. One of the methods of purification of leach liquor is ion exchange, which involves

  14. A.
    exchange between two liquid phases.
    B.
    exchange between a gaseous phase and a liquid phase.
    C.
    exchange between a liquid phase and an organic resin phase.
    D.
    exchange between a solid phase and a gas phase.

  15. A steam pipe is intended to be insulated with two layers of insulating materials of different thermal conductivities. For minimum heat transfer to take place

  16. A.
    the better insulation material should be put just next to pipe (i.e., inside).
    B.
    the better insulating material should be put outside.
    C.
    either of the insulating material could be put on either side.
    D.
    steam temperature is considered before deciding as to which insulating material is to be put inside (i.e., just next to the pipe).

  17. Large diameter shafts are manufactured by

  18. A.
    hot rolling.
    B.
    cold drawing.
    C.
    casting and turning to size.
    D.
    forging and turning to size.

  19. Common salt is produced from sea water in India generally by the __________ method.

  20. A.
    freeze drying
    B.
    solar evaporation
    C.
    electrolytic
    D.
    none of these